observational studies
Unobserved Heterogeneity in Observational Studies of Political Behavior
... in observational studies in political science, and the social sciences in ...In studies of political behavior, this heterogeneity sometimes takes the form of voters’ core beliefs, which are hard to ...
130
DEBATE-statistical analysis plans for observational studies
... for observational studies has been intensely debated [12–15, ...and observational studies and are parallel to our previ- ous recommendations to publicly and transparently communicate all ...
10
The Analysis of Censored Covariates in Observational Studies
... most observational studies, because infusion length was left to the discretion of the physician rather than dictated by design (randomization), patients receiving different durations may not be ...
109
The risk of bias in observational studies of exposures (ROBINS-E) tool: concerns arising from application to observational studies of exposures
... 3 observational studies from different research areas relevant to meta-analyses that we were conducting (1) a cohort study examining association of dairy consumption with cardiovascular disease [22], (2) a ...
11
Cholesterol consumption and risk of endometrial cancer: a systematic review and dose-response meta-analysis of observational studies
... included studies. Second, the differences between studies design of these included studies also limited us to interpret the findings of this ...Case-control studies are inherently more ...
13
The specification of the propensity score in multilevel observational studies
... 2004). In particular, propensity score matching methods have become popular among researchers: this approach is, for example, widely applied when evaluating labour market policies (see e.g., Bryson et al, 1992; Heckman ...
20
Observational studies of treatment effectiveness: worthwhile or worthless?
... in observational studies, is known as channeling bias or confounding by indication, and arises when the indication for choosing a particular treatment also affects the ...
8
Modern Optimization in Observational Studies
... Each of the four chapters within the body of the chapter contains a single, self-contained, paper. In the first paper, we investigate the causal effect of admission to an ICU versus to a hospital ward on 60 day mortality ...
177
Quality of observational studies in prestigious journals of occupational medicine and health based on Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: a cross sectional study
... Observational studies have an important role in research- ing the benefits and harms of medical interventions ...these studies should be reported as trans- parently as possible “so that readers can ...
7
Recommendations for observational studies of comorbidity in multiple sclerosis
... heterogeneity in study design, bias, and true differ- ences between populations. Common limitations included the failure to report diagnostic criteria or validation of the approach used to identify the MS population or ...
9
Kinematic and observational studies of stellar streams
... Figure 1.3 presents the radial velocities of the Niichigan stars against galactic longitude, and shows clear evidence for the continuation of the Hyades and Sirius streams amongst the mo[r] ...
197
ba98a6d76b43bfe6876aa015971f8c9e3c487db3.pdf
... from observational studies were inconsis- tent with our instrumental variable ...general observational association between dairy intake and ...
11
Early versus late intramedullary nailing for traumatic femur fracture management: meta-analysis
... of observational studies. Included cohort studies were rated favorably on most ...cohort studies was fa- vorable on the former and only two studies reported at- tempts to control for ...
11
Qualitative Assessment and Reporting Quality of Intracranial Vessel Wall MR Imaging Studies: A Systematic Review
... Categorical variables are expressed in counts and percentages. Distributions of continuous variables are summarized with means and SDs or medians and interquartile ranges. Agreement was calculated with an unweighted ...
8
Thymectomy in nonthymomatous myasthenia gravis - systematic review and meta-analysis
... of observational studies provide support for clinical practice until RCTs are conducted, although clinical and methodological heterogeneities are observed due to the nature of observational ...
11
The association of hypertriglyceridemia with cardiovascular events and pancreatitis: a systematic review and meta-analysis
... association studies is the observa- tional nature of the existing ...of observational studies, the ability to adjust for confounding is limited by the level of adjustment conducted in the original ...
18
Review Article Early actate levelsfor prediction of mortality in patients with sepsis or septic shock: a meta-analysis
... vational studies (POSs) and retrospective observational studies (ROSs) prognosticating ...prospective observational studies (POSs) and fourteen retrospective observational ...
11
Agreement between retinal images obtained via smartphones and images obtained with retinal cameras or fundoscopic exams – systematic review and meta-analysis
... included observational studies – cohort, cross-sectional, or case–control studies – baseline results of randomized or non-randomized clinical tri- als, or observational follow-up after ...
9
One and two stage surgical revision of infected elbow prostheses following total joint replacement: a systematic review
... longitudinal observational studies and RCTs that reported on infection control and/or other clinical endpoints after one- or two-stage surgical revision of an infected elbow ...human studies were ...
9
Pulmonary Hypertension Therapy and a Systematic Review of Efficacy and Safety of PDE-5 Inhibitors
... the observational studies, children varied in age from extremely preterm infancy to ...13 observational studies, although intravenous sildenafil, 36, 38 enteral vardenafil, 40 and enteral ...
23