Disorder | Age group | Rheumatoid arthritis cohort | Comparison cohort | IRR (95% CI) | aIRR (95% CI) | ||||
---|---|---|---|---|---|---|---|---|---|
(ICD-9-CM) | (Years) | No. of patient | Person-years | Incidence | No. of patient | Person-years | Incidence | p value | p value |
Gingivitisa (523.0, 523.1, 523.2) | |||||||||
Overall | 419 | 5938 | 70.56 | 3805 | 60,310 | 63.09 | 1.12 (1.01–1.24) 0.030 | 1.13 (1.01–1.25) 0.027 | |
Sex | |||||||||
Male | 67 | 1357 | 49.37 | 817 | 13,499 | 60.52 | 0.82 (0.64–1.05) 0.109 | 0.86 (0.66–1.11) 0.241 | |
Female | 352 | 4581 | 76.84 | 2988 | 46,811 | 63.83 | 1.20 (1.08–1.34) 0.001 | 1.19 (1.06–1.34) 0.003 | |
Age group (years) | |||||||||
20–54 | 269 | 3258 | 82.57 | 2443 | 33,870 | 72.13 | 1.14 (1.01–1.30) 0.036 | 1.17 (1.02–1.33) 0.022 | |
> 55 | 150 | 2680 | 55.97 | 1362 | 26,440 | 51.51 | 1.09 (0.92–1.29) 0.334 | 1.09 (0.92–1.30) 0.330 | |
Periodontitisb (523.3, 523.4, 523.5, 523.8) | |||||||||
Overall | 694 | 4049 | 171.40 | 6239 | 40,686 | 153.35 | 1.12 (1.03–1.21) 0.005 | 1.13 (1.04–1.22) 0.004 | |
Sex | |||||||||
Male | 144 | 989 | 145.60 | 1381 | 8943 | 154.42 | 0.94 (0.79–1.12) 0.503 | 1.00 (0.83–1.19) 0.962 | |
Female | 550 | 3060 | 179.74 | 4858 | 31,743 | 153.04 | 1.17 (1.08–1.28) < 0.001 | 1.17 (1.07–1.28) 0.001 | |
Age group (years) | |||||||||
20–54 | 405 | 2207 | 183.51 | 3722 | 22,673 | 164.16 | 1.12 (1.01–1.24) 0.033 | 1.15 (1.03–1.28) 0.013 | |
> 55 | 289 | 1842 | 156.89 | 2517 | 18,013 | 139.73 | 1.12 (0.99–1.27) 0.063 | 1.14 (1.00–1.29) 0.043 |