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Table 1 Demographic characteristics of studied patients

From: Comprehensibility, reliability, validity, and responsiveness of the Thai version of the Health Assessment Questionnaire in Thai patients with rheumatoid arthritis

Demographic characteristics Comprehensibility assessment Reliability, validity, responsiveness assessment
Number of patients 126 115
Females/males, number (percentage) 114/12 (90.5%/9.5%) 99/16 (86.1%/13.9%)
Age in years, mean ± SD 50.5 ± 13.0 48.9 ± 11.9
Disease duration in months, mean ± SD ND 68.9 ± 71.8
Rheumatoid factor-positive patients, number (percentage) ND 88 (76.5%)
Formal education, number (percentage) of patients   
   ≤6 years 92 (73.0%) 81 (70.4%)
   >6 to ≤12 years 26 (20.6%) 24 (20.9%)
   >12 years 8 (6.4%) 10 (8.7%)
  1. ND, no data; SD, standard deviation.