Figure 5From: Percentile benchmarks in patients with rheumatoid arthritis: Health Assessment Questionnaire as a quality indicator (QI)Age-related changes in median Health Assessment Questionnaire Disability Index (HAQ-DI) in 64,647 observations in 6436 patients with rheumatoid arthritis compared with 5751 observations in 587 nondiseased controls of the Stanford Runners study and 23,414 observations in 2843 subjects in the University of Pennsylvania Alumni study.Back to article page