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Optimising the use of electronic health records to estimate the incidence of rheumatoid arthritis in primary care: what information is hidden in free text?

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Academic year: 2020

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Figure

Figure 1 Schematic model of GPRD database.
Table 2 Prevalence of indicator markers and keywords in the records of rheumatoid arthritis patients in the yearpreceding diagnosis, and time interval before RA diagnosis
Table 3 List of the most frequent Read codes used in conjunction with free text containing keywords
Table 4 Comparison of information available from codes and keywords in year preceding diagnosis in RA patients

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