Table 4.
Incidence Rate Ratio and Hazard Ratio of the Risk of systemic ADs between IBT and non-IBT group.
| Event | Person Year | IncidenceRate† | IRR | aHR | |||
|---|---|---|---|---|---|---|---|
| Polymyositis/dermatomyositis |
|
|
|||||
| IBT Group | 0 | 73009.17 | 0.00 | N.A | N.A | ||
| Non-IBT Group | 7 | 474442.69 | 1.48 | Ref. | Ref. | ||
| Rheumatoid arthritis | |||||||
| IBT Group | 18 | 72946.54 | 24.68 | 1.04 (0.63-1.70) | 0.91 (0.55-1.52) | ||
| Non-IBT Group | 113 | 474132.51 | 23.83 | Ref. | Ref. | ||
| Primary Sjogren’s syndrome | |||||||
| IBT Group | 28 | 72940.62 | 38.39 | 1.12 (0.75-1.68) | 1.06 (0.70-1.60) | ||
| Non-IBT Group | 162 | 474072.65 | 34.17 | Ref. | Ref. | ||
| Systemic lupus erythematosus | |||||||
| IBT Group | 2 | 73000.58 | 2.74 | 0.39 (0.09-1.64) | 0.38 (0.09-1.62) | ||
| Non-IBT Group | 33 | 474384.46 | 6.96 | Ref. | Ref. | ||
| Systemic sclerosis | |||||||
| IBT Group | 1 | 73006.74 | 1.37 | 0.81 (0.10-6.49) | 0.94 (0.11-7.97) | ||
| Non-IBT Group | 8 | 474436.63 | 1.69 | Ref. | Ref. | ||
| Systemic vasculitis | |||||||
| IBT Group | 0 | 73009.17 | 0.00 | N.A | N.A | ||
| Non-IBT Group | 1 | 474444.39 | 0.21 | Ref. | Ref. | ||
IR, incidence rate was incidences of per 100,000 person-years. HR, hazard ratio; aHR, adjusted hazard ratio; CI, confidence interval; NA, not available.