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I. Introduction: Anorexia Nervosa

Anorexia nervosa (AN) is a serious, potentially life-threatening eating disorder characterized

by self-starvation and excessive weight loss. Anorexia is one of the most common psychiatric

diagnoses in young women, affecting about 1%, and has the highest mortality rate of any mental

illness. Between 5-20 percent of individuals struggling with AN will die from the disorder2. The

probability of death increases with increased duration of the illness. The following is the DSM-V

diagnostic criteria for Anorexia Nervosa3:

A. Restriction of energy intake relative to requirements leading to a significantly low body

weight in the context of age, sex, developmental trajectory, and physical health.

Significantly low weight is defined as a weight that is less than minimally normal, or, for

children and adolescents, less than that minimally expected.

B. Intense fear of gaining weight or becoming fat, or persistent behavior that interferes with

weight gain, even though at a significantly low weight.

C. Disturbance in the way in which one's body weight or shape is experienced, undue

influence of body weight or shape on self-evaluation, or persistent lack of recognition of

the seriousness of the current low body weight.

The DSM-V also divides AN into two diagnostic categories, restrictive anorexia and binge/purge

anorexia. The restricting type is characterized by self-starvation without engagement in recurrent

episodes of binge eating or purging behavior (i.e., self induced vomiting or the misuse of

laxatives, diuretics, or enemas). The binge/purge subtype is characterized by self-starvation with

engagement in recurrent episodes of these binge eating or purging behaviors3.

The level of care needed for the treatment of an AN patient depends on the severity of the

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constant monitoring of weight, vital signs and/or laboratory test values, are malnourished and/or

refuse oral intake, possibly require nutrition support, and weigh less than 75% of ideal body

weight (IBW). Those requiring partial hospitalization treatment and day treatment are medically

stable but have difficulty following a meal plan without supervision. Treatment typically lasts

two to three months and consists of a structured behavioral program aimed at normalizing weight

and eating behavior. Patients are prescribed meal plans with sufficient caloric content to gain at

least one kilogram per week and additional calories in the form of supplements, such as Ensure,

Boost, etc are often added. These supplements are used when patients do not consume 100% of

their meal in order to assure that patients are still meeting their caloric needs even if restriction

and other ED behaviors are being used. Patients are seen in individual therapy as well as group

and family therapy multiple times per week.

Weight-restoration continues until the patient reaches at least 90% of IBW. After

weight-restoration, patients remain in treatment between two to four weeks for practice with “normal”

eating behaviors such as buffet portioning and ordering at restaurants, continued support with

meals and redirection of eating disorder behaviors, and discharge planning. Once patients

suffering from anorexia are weight restored, they usually require more calories than the general

population to maintain their weight, needing approximately 50-60 kilocalories/kg/day, as

compared with 30-40 kilocalories/kg/day6. By the end of their hospital stay, patients’ daily food intake routinely exceeds 3000 kcals. It is estimated that these increased metabolic requirements

in weight-restored AN patients may last up to a year6. Unfortunately, the rate of relapse

following treatment is very high. Reported relapse rates range from 30% to 50%, with the

greatest risk of relapse occurring in the first year following treatment1. These high relapse rates

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that weight restoration is only the first step in an extensive recovery process for patients with

AN.

II. Eating Behaviors in AN Patients Before and After Treatment

In addition to weight loss, disturbance in eating behavior is a hallmark clinical feature of

anorexia. Before treatment, AN patients typically avoid high-calorie foods and eat a limited

variety of foods both across and within food groups8. Hadigan et al. documented that, when

allowed to choose their own meals, AN patients consumed far fewer calories than controls,

especially by reducing calories from fat16. Most patients regularly skip meals and maintain very strict diets such as vegetarianism, low-carb, or low-fat diets. Structured treatment programs, like

day hospitals and in patient facilities are generally successful at helping patients to gain weight

and provide varied diets and sufficient calories; however, abnormal eating behaviors typically

persist after treatment16. Steinglass et al. reported that weight-restored patients ate significantly

less than healthy controls at a single-item (i.e., macaroni and cheese) meal than healthy

controls15. Another study reported that weight-restored AN individuals who had completed

inpatient treatment chose diets after treatment that were significantly lower in energy,

carbohydrate, and fat content than healthy individuals16. Mayer et al., replicated these findings in a study in which patients were asked to consume lunch meals near the beginning and end of their

hospital stays. While the kilocalories in the end-of-stay meal increased from the

beginning-of-stay meal, intake at both meals was less than controls by more than 200 kilocalories and was

lower in percent of calories derived from fat7. These behaviors may persist for many years

following treatment. In a 20-year follow-up study of previously hospitalized patients, Eckert et

al., found abnormal eating behaviors that included eating low calorie foods (71%), eating small

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treatment, such as avoiding fat or skipping meals, often return rather quickly after he/she leaves

treatment.

Research reveals that decreased dietary energy density and decreased diet variety may

play a significant role in increasing the rate of relapse among weight restored AN patients after

treatment. Schebendach et al. conducted two separate studies that examined the relationship

between eating behavior immediately prior to hospital discharge and outcome over the next year

among weight restored AN patients. Eating behavior was assessed from four-day food records

obtained after participants had maintained >90% IBW for 2 to 4 weeks. Dietary energy density

scores and diet variety scores were calculated from the four-day food record. Weight-restored

patients consuming a diet of lower energy density or of a limited variety of foods were more

likely to relapse in the year following hospital discharge compared to those individuals with

more varied diets and higher overall density10. Studies suggest that in normal weight,

overweight, and obese individuals, increased diet variety is associated with increased energy

intake, while limited dietary variety is associated with decreased energy intake and weight loss9. The decreased diet variety of AN patients after treatment may possibly contribute to weight loss

and successive relapse. Weight maintenance in AN patients has been shown to be a crucial factor

in recovery1. Once a weight-restored patient begins to lose even a small amount of weight, it is a

slippery slope and many patients will return back to their very low IBW reached prior to

treatment.

It is evident that current treatment strategies are able to promote weight restoration in AN

patients but are not as successful in normalizing eating behavior. Without addressing the factors

responsible for abnormal eating behaviors, AN patients may return back to their restrictive,

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variety is correlated with increased overall calorie intake and weight gain, the outcome of AN

may be improved through increased focus on improving patients’ narrow range of food choices.

III. Overlap Between Anxiety Disorders and AN

Research suggests that many of the abnormal eating behaviors seen in AN, described

above, may be anxiety-reducing coping mechanisms14. There are clear similarities between the

clinical phenomena seen in AN and those described in anxiety disorders and

obsessive-compulsive disorders (OCD). Patients with AN commonly describe feeling nervous and unable

to relax and often report physical symptoms of anxiety, such as muscle tension, shortness of

breath, and fidgeting. There is also a high degree of comorbidity diagnosis between anxiety

disorders and AN. In a study of lifetime diagnoses, 55-62% of patients with current or past AN

had at least one DSM-IV anxiety disorder diagnosis. Studies have consistently found that in the

majority of patients with comorbid diagnoses, anxiety disorders preceded the onset and diagnosis

of AN. In addition, those with comorbid diagnoses manifested more severe symptoms of AN14.

The primary characteristic of AN is an avoidance of food due to the belief that it will

produce weight gain. Three core features of anxiety- fear, avoidance, and rituals- may play a

significant role in this disturbance. “Fear of fat” is central to the diagnosis of AN and this fear

often drives avoidance behavior, such as avoiding high calorie or high fat foods. Individuals with

AN also often demonstrate rigidly controlled, rule-bound eating patterns as well as abnormal,

ritualized eating behaviors that are meant to decrease their anxiety around food, such as cutting

food into tiny pieces, taking very small bites, refusing to touch silverware, etc. Individuals with

AN may also develop “safe” and “unsafe” foods that leads to a narrow, restricted diet that lacks

variety and is often low in fat14. Steinglass et al., also found that for patients with AN, greater

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suggests that there is a direct association between anxiety and the restrictive eating behavior seen

in AN15.

Steinglass et al., created a model of AN in which traits of anxiety and obessionality result

in a combination of fearful avoidance of calorie dense foods and irrational beliefs surrounding

eating. This combination ultimately results in a diet with limited variety that promotes weight

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In this model, if the anxiety-related components of AN are not addressed- specifically

those of avoidance, rigidity, and rituals- even after successful weight gain, patients are highly

susceptible to losing weight and becoming vulnerable to relapse. While anxiety decreases in

some patients after weight-restoration, many patients experience the same level, if not increased

anxiety after weight restoration. Addressing these “food fears” and avoidance behaviors may be

a useful approach to treating the dysfunctional beliefs and behaviors that serve to perpetuate AN.

Currently, the most widely used treatment for all eating disorders is Cognitive Behavioral

Therapy (CBT), which emphasizes changing beliefs that lead to maladaptive behaviors. CBT has

been demonstrated to be successful in treating bulimia nervosa; however, its success with AN is

not as clear4. While CBT may help patients to manage the stress of gaining weight during

treatment, it does not necessarily repair the dysfunctional eating behaviors that prompted the

weight loss. If AN and anxiety share characteristic traits, and if these traits are at the core of

these abnormal eating behaviors, it is reasonable to suggest that treatment approaches aimed at

reducing anxiety could potentially be successful treatment strategies for AN. A number of

studies have applied Exposure and Response Prevention therapy, a common treatment strategy

for anxiety disorders, to the treatment of AN. To date, there is limited research on the effect of

exposure therapy to improve food intake in AN. The following section reviews the available

evidence on the use of exposure therapy for treating AN.

IV. Exposure Therapy to Improve Eating Behaviors in AN Patients: A Review of the Evidence

Exposure and Response Prevention therapy is one of the primary treatment methods for

anxiety disorders such as generalized anxiety, OCD, and phobias5. This treatment is predicated

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designed to elicit a patient’s emotional experience in the moment and to, in the process, identify

and address feared consequences. While in the presence of a trained professional, the patient is to

stay in contact with the trigger without engaging in ritual (escape) behaviors. The goal is to

habituate the patient to the anxiety and therefore decrease the psychological and physical

responses to the phobia over time14.

Research demonstrates that AN patients have high anxiety towards high calorie and high

fat foods. This has been shown in Cynthia Bulik’s work in which she studied the psychological

affect (i.e., feelings, attitudes) towards food and weight stimuli in three groups: patients with

acute AN, patients recovered from AN, and healthy controls with no AN history. In this study, participants from each group were shown a variety of high-calorie, low-calorie, thinness-related,

and fat-related images, amongst others. They found that AN patients displayed significantly

greater negative implicit affect toward images of high- but not low-calorie food, indicating that

they do not display negative implicit affect toward all foods: only high-calorie foods. Bulik et al., recommend that treatment should help patients reduce negative reactions to high-calorie (junk, hyper-palatable, etc.) food through exposure therapy11.

Recently Joanna Steinglass and colleagues have published a few papers developing a

treatment intervention to target eating-related fear and anxiety, known as Exposure and Response

Prevention for AN (AN-EXRP). AN-EXRP is a manualized treatment that adapts exposure and

response prevention techniques to address eating disorder behaviors. They argue that, given the

fact that “eating patterns prior to discharge are related to such individuals’ ability to maintain

longer-term health” it is important to engage “patients in the task of confronting, rather than avoiding, fears” so that they can “experience decreasing anxiety over time”. During individual

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holding a sandwich and eating it without the use of anxiety-reducing rituals, such as breaking it

into pieces or taking tiny bites. Interventions aim to enhance the patient’s awareness of the

physical symptoms of anxiety (ex. nausea, sensations of fullness, tension, etc), help him/her

articulate the feared consequences (ex. immediate obesity), and recognize that the feared

outcome (ex. weight gain) did not occur. A patient may begin the exposure treatment by simply

holding, smelling, and tasting the food and over several sessions work up to eating the food in its

entirety in one sitting. According to the literature that describes AN-EXRP, the ultimate goal of

AN-EXRP is to specifically encourage increased dietary variety, increased intake of high fat

foods or high calorie foods, and increased caloric intake overall12.

Two studies conducted by Steinglass et al., evaluated the use of AN-EXRP and its effect

on the eating behavior of weight-restored AN patients, specifically its effect on overall caloric

intake. In the first study, 9 participants were recruited between the ages of 16 and 45 who met the

DSM-IV criteria for AN. The intervention consisted of 12 individual 90-minute sessions for four

weeks. Each session included an exposure to a feared eating situation, beginning with the least

feared exposure at the first session and progressively moving up to the most feared exposure.

Eating behavior and anxiety were assessed before and after the study treatment using test meals,

self-report four-day food records, and three standardized anxiety measurement tests (STAI-S,

STUDS, FAH). The primary outcome measure was caloric intake and meal-related anxiety in a

laboratory meal in which patients were provided with a tray consisting of a sandwich, a large

bowl of potato chips, and a small bottle of water. Participants were instructed to eat an

appropriate lunch and intake was calculated by measuring the weight of the food. Pre-meal

anxiety, as measured by STAI-S before entering the test meal room decreased from 58.4±6.4

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before AN-EXRP was 429±169 kcal and after AN-EXRP mean intake was 434±242 kcal. These

results suggest that over the course of AN-EXRP treatment, mean meal-related anxiety decreased

and caloric intake increased12. Limitations of this study include the small sample size, lack of a control group, and relatively short treatment period.

Steinglass et al., replicated the study above in a 4-week randomized controlled trial to

again evaluate the effects of AN-EXRP on caloric intake in a laboratory setting. Cognitive

remediation therapy (CRT) was selected as a control for the experiment as there is no evidence,

to date, that CRT is associated with an increase in caloric intake in AN patients. All participants

were receiving in patient treatment for AN at the same treatment center and were randomly

assigned to receive either AN-EXRP or CRT. There were 30 individuals in each group that

completed the study. The intervention is similar to the intervention described above and the

primary outcome was change in caloric intake between the baseline and post-treatment

laboratory lunch meal. The meal consisted of a large sandwich, a bottle of mayonnaise, a bowl of

potato chips and a bottle of water. Participants were instructed to eat an appropriate lunch and

intake was calculated by measuring the weight of the food. The average test meal caloric intake

of participants who received AN-EXRP increased from 352±263 kcal at baseline to 401±215

kcal post-treatment, while that of participants who received CRT decreased from 501±232 kcal

at baseline to 424±221 kcal post-treatment. These results indicate that those randomized to

AN-EXRP had significantly better change in food intake in a test meal than the control group13. Levinson and Byrne created a Fear of Food Measure (FOFM) to assess the improvements

in patients undergoing AN-EXRP treatment. They conducted four separate studies to first assess

the validity of the FOFM and then to assess the anxiety about eating, food anxiety behavior, and

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recruited from an eating disorder facility (n=41) were matched to healthy controls (n=23)

recruited from the local community. Participants completed four sessions of a 45-minute

mealtime exposure intervention focusing on mealtime anxiety. Food percentage was measured at

the end of the meal to calculate percent consumed. As expected, participants with an eating

disorder had significantly higher levels of anxiety about eating than the matched controls, both

before and after the study. However, across the AN-EXRP intervention, anxiety about eating,

food avoidance behaviors, and feared concerns all significantly decreased in the eating disorder

participants. As described previously, pre-meal anxiety has been shown to be associated with

food intake. By decreasing pre-meal anxiety, AN-EXRP could potentially increase caloric intake

and decrease the fear of food among AN patients. It is important to note that this study did not

exclude other eating disorder diagnoses and some participants were diagnosed with bulimia

nervosa5.

V. Research Translated into Practice

While the research demonstrates that exposure therapy can be a useful tool in the

treatment of AN, its implementation in practice is not typically the scientific, manualized

treatment that is described in the studies above. There is a gap that exists between how exposure

therapy has been utilized in research and how it is currently being utilized in practice. Current

practice includes strategies that could also could be considered exposure therapy, however, these

strategies are mostly done in group settings rather than individually and take place outside the

walls of a therapy room. In most current eating disorder treatment centers, these strategies

include group restaurant outings, cooking groups, and buffet portioning. Once patients get to a

certain level in treatment (i.e. greater than 85% IBW and 100% completion at most meals), they

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themselves or in small groups. Restaurant outings expose patients to “fear foods” that they would

face in their normal, everyday lives such as when they are at school or when they are eating out

with family and friends. Another strategy is cooking groups in which patients cook meals for

themselves in small groups at the treatment center facility. Cooking groups give patients the

opportunity to be exposed to ingredients that they would not normally cook with (i.e. pasta, red

meat, butter, etc) and mimic the “normal” experience of cooking with family and friends at

home. In addition, patients become more familiar with the kitchen and more comfortable with

cooking a wider variety of foods in the hopes that they will continue to cook a wider variety of

foods upon their return home after treatment. Patients also practice buffet portioning at the

treatment center. With the help of a Registered Dietitian, patients serve themselves and plate

their own meals from a buffet that is set up by the kitchen. At first, most patients will greatly

under portion themselves when plating their own meals; buffet portioning helps them practice

meeting their exchanges at meals while they still have the help and support of an RD present.

These activities are typically done at least 2-3 times per week and serve to help patients confront

the anxiety that undoubtedly comes with eating meals that are viewed as “scary” such as

restaurant foods and desserts.

While all three of these strategies are successful at utilizing exposure therapy, they do not

have specific, measurable outcomes that show that their use in treatment is effective at increasing

diet variety and decreasing food avoidance once patients return home. In typical treatment, these

strategies are mostly successful at decreasing patients’ anxiety surrounding fear foods, but it is

difficult to follow patients after leaving treatment. Do these strategies continue to reduce a

patient’s anxiety around food once he/she returns home? Would they have the same outcome as

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manualized exposure therapy sessions into AN patients’ treatment may improve AN treatment

outcomes, there are barriers to incorporating AN-EXRP into treatment. These barriers include

available training to practitioners, reimbursement, lack of measurable outcomes, and lack of

knowledge related to frequency of treatment (i.e. once per week, twice per week, etc.). It is

therefore easier, cheaper, and more pragmatic to instead incorporate the three strategies

described above.

VI. Discussion

While current treatment strategies for AN are generally successful at promoting

weight-restoration among the AN patient population, the rate of relapse following treatment is

substantial, indicating that current treatments are not completely adequate. Although the research

on Exposure and Response Prevention therapy in the treatment of AN is very limited, the studies

described above demonstrate that this approach may be a novel strategy to address the abnormal

eating behaviors that still plague many patients after treatment. While there are no studies that

directly measure changes or improvements in diet variety as an outcome, these studies do

suggest that overall energy intake increases after AN-EXRP treatment. As described previously,

studies suggest that in normal weight, overweight, and obese individuals, increased diet variety is

associated with increased energy intake and limited dietary variety is associated with decreased

energy intake and weight loss9. Therefore producing an increase in these patients’ caloric intake will most likely also produce an increase in diet variety. It is also reasonable to assume that by

overcoming anxiety related to “fear foods”, patients will be able to leave treatment with a less

restrictive diet by being willing and open to incorporate more of these fear foods into their daily

diet. For example, if a patient is vegetarian due to the belief that eating meat will make him/her

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the feared outcome of instantly gaining weight when consuming meat will not occur. The patient

is then more likely to return home with a diet that incorporates meat. In addition, while treatment

programs often incorporate “food challenges” in which patients are encouraged to add fear foods

into their diet, few treatment programs structure meals to ensure that the foods that are presented

are those that the patient actually fears. A critical component of AN is that all patients have

slightly different fears/avoidances/behaviors. One patient may have severe anxiety when asked to

eat a turkey sandwich, while another may have very little anxiety when faced with the sandwich

but really struggle when presented with dessert. If the second patient is only challenged once

during treatment with a dessert, he/she will most likely leave treatment continuing to avoid most

dessert foods.

Despite the advantages described above, incorporating AN-EXRP treatment into practice

is not necessarily realistic or practical. Few treatment centers have the resources to actually

provide the one-on-one time that is required for implementation of AN-EXRP therapy.

Restaurant outings, cooking groups, and other food exposure activities are typically done in

group settings because this is more efficient and ultimately requires fewer staff members to

participate. Conducting at least 12 one-on-one sessions throughout a patient’s treatment stay

would require an excessive amount of paid RD staffing time. More than likely treatment centers

would have to hire additional RDs and additional primary therapists to accommodate this large

increase in patient sessions. In addition, very few RDs and therapists are actually trained to

conduct the manualized treatment of Exposure and Response Prevention Therapy. Treatment

centers would need to provide additional training for their employees, which is costly and time

consuming. Treatment centers are also typically not reimbursed by insurance for each patient

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a larger number of one-on-one patient sessions during a patient’s stay does not necessarily equate

to a larger financial return.

While the research suggests that AN-EXRP may be a successful strategy, more questions

need to be answered in the research in order to determine if the benefits gained from its

implementation into practice support the increase in cost and staffing. How often should

exposure therapy sessions be conducted? Does exposure therapy need to be conducted in

therapeutic sessions or does exposing a particular food to a patient everyday have a similar

outcome? For example, if a patient fears chocolate cake, does including chocolate cake in their

dinner every night have the same outcome on their anxiety levels as exposing the patient to

chocolate cake in weekly sessions with a therapist? If exposures do not necessarily need to be

conducted in one-on-one patient sessions and can rather be implemented during meals,

implementation of AN-EXRP is significantly more practical. Another question that needs to be

answered is whether or not there is certain criteria that AN patients need to meet in order to be

“eligible” for AN-EXRP sessions. It is unlikely that AN-EXRP is applicable to all AN patients

because the root cause, severity, and willingness of AN patients is going to be somewhat

different. Some patients may be very opposed to weekly one-one-one exposure sessions, and

their lack of willingness will definitely influence the effectiveness of the treatment. AN patients

are extremely complex, and one treatment strategy will not work for all patients.

Finally, it is important for additional research to determine a best practice when

measuring the change in a patient’s anxiety levels and food behaviors both before and after

exposure therapy sessions. Should the outcome measured be the presence of specific eating

disorder behaviors (i.e. hiding food, taking tiny bites, etc.) that are serving as a coping

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patient’s anxiety level itself using standardized anxiety measurement tests (ex. STAI-S, STUDS,

FAH)? Having a measurable outcome that can confirm the effectiveness of AN-EXRP treatment

is essential in order to provide motive for its implementation. Answering these questions will

help shape the best practices for the implementation of AN-EXRP therapy, as well as solidify the

evidence for its use in treatment.

The one factor that has not yet been addressed but that is critical to the success of

AN-EXRP therapy is the importance of patients completing the entire treatment program.

Unfortunately some patients, due to both cost and to willingness/motivation, leave treatment

before the clinical staff recommends it. Although patients may be weight-restored at the time that

they leave, many of their eating disorder behaviors, food fears, and food avoidances may not

have been addressed. If this is the case there is a very high probability for relapse, and this

patient will most likely end up back in treatment. In order for AN-EXRP therapy to be

successful, patients need to be in treatment long enough to be exposed to most or all of their food

avoidances and food fears. This will ultimately increase their diet variety upon completion of

treatment.

VII. Conclusion

As described previously, most AN patients that leave treatment require a significant

number of calories in order to maintain their weight. AN patients are at a high risk for relapse

after weight-restoration, indicating that abnormal eating behaviors, such as food avoidance and

food fears, are not always addressed during treatment. The diet variety of AN patients tends to be

narrow and limited both before and after treatment, which is likely due to the continued presence

of these abnormal eating behaviors. AN and anxiety share core features, namely fear, avoidance,

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Prevention Therapy, has been suggested as a possible treatment approach for addressing these

abnormal AN eating behaviors. AN-EXRP could alter patients’ experiences around eating and

increase their flexibility of food choice and caloric consumption, thus improving their ability to

maintain weight and prevent relapse. While studies utilizing this approach suggest that this may

be an effective treatment tool, the current research is very limited and describes only short-term

results. Future longitudinal research will be needed to test the long-term effects of AN-EXRP in

the treatment of AN.

One of the biggest barriers in implementation of AN-EXRP treatment is a lack of

proficient providers. I would recommend that all dietetic (RD) education programs offer students

the opportunity to receive training in exposure therapy. In addition, the Academy of Nutrition

and Dietetics should offer continuing education credits for this training on a consistent basis to

current and future RDs. I would also like to see an increase in “on the job” training for those RDs

currently working in the ED field that would like to implement this training into their practice.

Simply put, I would like to see an increase in general knowledge and awareness surrounding

exposure therapy and its use in AN treatment. In addition, I would like to see research that

addresses how often this therapy needs to be conducted in order for it to be effective, who

qualifies for the treatment, and how changes in anxiety or food behaviors can be accurately

measured in order to confirm that the treatment has been successful for a particular patient. If

these questions are not answered, implementation of AN-EXRP treatment may simply be too

costly and impractical.

To date, there are few studies and a lack of evidence-based interventions for eating

disorders in general and there are large gaps in research identifying successful treatment

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currently there is no “gold standard” treatment strategy. AN is an extremely complex disorder

with many factors contributing to the development and progression of the disorder. Therefore

exposure interventions should be integrated into a broader treatment program. CBT and

family-based therapy are useful in reducing cognitive rigidity, changing negative self-image beliefs, and

improving family relationships. Together, these various therapeutic strategies can form the base

of a comprehensive treatment program that can hopefully decrease AN patients’ anxiety,

improve abnormal eating behaviors, and ultimately improve the outcome of this devastating

illness.

References

1. Bodell, L. P., & Mayer, L. E. S. (2011). Percent body fat is a risk factor for relapse in anorexia

nervosa: a replication study. The International Journal of Eating Disorders, 44(2), 118–

123.

2. Eating Disorders Statistics - National Association of Anorexia Nervosa and Associated

Disorders. (n.d.). Retrieved from

http://www.anad.org/get-information/about-eating-disorders/eating-disorders-statistics/ on October 3rd 2015.

3. Important Changes in Eating Disorder Diagnoses in DSM-V - National Association of

Anorexia Nervosa and Associated Disorders. (n.d.). Retrieved from on

http://www.anad.org/news/important-changes-in-eating-disorder-diagnoses-in-dsm-v/ on

October 3rd 2015.

4. Koskina, A., Campbell, I. C., & Schmidt, U. (2013). Exposure therapy in eating disorders

revisited. Neuroscience and Biobehavioral Reviews, 37(2), 193–208.

5. Levinson, C. A., & Byrne, M. (2015). The fear of food measure: a novel measure for use in

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48(3), 271–283.

6. Marzola, E., Nasser, J. A., Hashim, S. A., Shih, P.-A. B., & Kaye, W. H. (2013). Nutritional

rehabilitation in anorexia nervosa: review of the literature and implications for treatment.

BMC Psychiatry, 13, 290.

7. Mayer, L. E. S., Schebendach, J., Bodell, L. P., Shingleton, R. M., & Walsh, B. T. (2012).

Eating behavior in anorexia nervosa: before and after treatment. The International

Journal of Eating Disorders, 45(2), 290–293.

8. Schebendach, J. E., Mayer, L. E., Devlin, M. J., Attia, E., Contento, I. R., Wolf, R. L., &

Walsh, B. T. (2008). Dietary energy density and diet variety as predictors of outcome in

anorexia nervosa. The American Journal of Clinical Nutrition, 87(4), 810–816.

9. Schebendach, J. E., Mayer, L. E., Devlin, M. J., Attia, E., Contento, I. R., Wolf, R. L., &

Walsh, B. T. (2011). Food Choice and Diet Variety in Weight-Restored Patients with

Anorexia Nervosa. Journal of the American Dietetic Association, 111(5), 732–736.

10. Schebendach, J., Mayer, L. E. S., Devlin, M. J., Attia, E., & Walsh, B. T. (2012). Dietary

energy density and diet variety as risk factors for relapse in anorexia nervosa: a

replication. The International Journal of Eating Disorders, 45(1), 79–84.

11. Spring, V. L., & Bulik, C. M. (2014). Implicit and explicit affect toward food and weight

stimuli in anorexia nervosa. Eating Behaviors, 15(1), 91–94.

12. Steinglass, J., Albano, A. M., Simpson, H. B., Carpenter, K., Schebendach, J., & Attia,

E.(2012). Fear of food as a treatment target: exposure and response prevention for

anorexia nervosa in an open series. The International Journal of Eating Disorders, 45(4),

615–621.

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(2014). Confronting fear using exposure and response prevention for anorexia nervosa: A

randomized controlled pilot study. The International Journal of Eating Disorders, 47(2),

174–180.

14. Steinglass, J. E., Sysko, R., Glasofer, D., Albano, A. M., Simpson, H. B., & Walsh, B. T.

(2011). Rationale for the application of exposure and response prevention to the

treatment of anorexia nervosa. The International Journal of Eating Disorders, 44(2),

134–141.

15. Steinglass, J. E., Sysko, R., Mayer, L., Berner, L. A., Schebendach, J., Wang, Y., Walsh, B.

T. (2010). Pre-meal anxiety and food intake in anorexia nervosa. Appetite, 55(2), 214–

218.

16. Walsh, B. T. (2011). The importance of eating behavior in eating disorders. Physiology &

References

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