Age-adjusted standardized incidence ratio of Sjögren syndrome in patients with dermatomyositis, stratified by age
Age, yr | Dermatomyositis n = 1602 | Control n = 7981 | Rate ratio (95% CI) | ||
---|---|---|---|---|---|
No. (incidence)* | Follow-up† | No. (incidence) | Follow-up | ||
20–29 | 21 (19.37) | 1084.00 | 23 (3.72) | 6189.53 | 5.21 (2.89–9.42) |
30–39 | 22 (17.33) | 1269.83 | 20 (2.52) | 7949.00 | 6.89 (3.76–12.62) |
40–49 | 43 (20.78) | 2068.83 | 40 (3.54) | 11306.67 | 5.88 (3.82–9.04) |
50–59 | 39 (22.23) | 1754.50 | 27 (3.03) | 8902.50 | 7.33 (4.49–11.97) |
60–69 | 9 (9.55) | 942.00 | 14 (3.11) | 4508.67 | 3.08 (1.33–7.11) |
≥ 70 | 5 (11.13) | 449.33 | 3 (1.56) | 1924.17 | 7.14 (1.71–29.87) |
Total | 139 (18.37) | 7568.50 | 127 (3.11) | 40780.58 | 5.90 (4.64–7.50) |
Age-adjusted standardized incidence ratio | 5.92 (3.82–9.16) |