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Agreement between self-reported rheumatic disease and medical chart review
| Self-reported diagnosis | N | Available medical chart, n | Confirmed cases, n | Agreement between self-report and medical chart review, n (%) |
| RA | 2692 | 305 | 129 | 125 (40.9) |
| RA only | 2583 | 290 | 129 | 122 (42.1) |
| SpA | 637 | 90 | 60 | 48 (53.3) |
| SpA only | 528 | 75 | 60 | 42 (56.0) |
| RA and SpA | 109 | 15 | 0 | 0 (0.0) |
| Total | 3230 | 399 |
RA, rheumatoid arthritis; SpA, spondylarthritis.
