Table 3.
Observed number of CIN and cervical cancer cases, person-years, incidence rates per 1000 person-years, and incidence rate ratios for women with IBD compared with matched women from general population excluding women with an abnormal primary screen.
| Person-years | Obs-No | IR [95% CI] | IRR [95% CI] | |
|---|---|---|---|---|
| CIN1 | ||||
| IBD women | 23726 | 18 | 0.76 [0.45–1.20] | 0.95 [0.57–1.60] |
| Matched women | 92956 | 74 | 0.80 [0.63–1.01] | |
| CIN2 | ||||
| IBD women | 23235 | 26 | 1.12 [0.73–1.64] | 1.83 [1.15–2.91] |
| Matched women | 93167 | 57 | 0.61 [0.46–0.79] | |
| CIN3 | ||||
| IBD women | 23228 | 28 | 1.21 [0.80–1.74] | 1.56 [1.01–2.41] |
| Matched women | 93030 | 72 | 0.77 [0.61–0.97] | |
| Cervical cancer | ||||
| IBD women | 23383 | 2 | 0.09 [0.01–0.28] | 1.14 [0.16–5.13] |
| Matched women | 93381 | 7 | 0.07 [0.03–0.15] | |
| CIN2+ | ||||
| IBD women | 23070 | 56 | 2.43 [1.83–3.15] | 1.66 [1.21–2.25] |
| Matched women | 92726 | 136 | 1.47 [1.23–1.74] |
Bold numbers: statistically different.
OBS-No, observed number; CI, confidence interval; CIN, cervical intraepithelial neoplasia; CIN2+, CIN2, 3, or cervical cancer; IBD, inflammatory bowel disease; No. number; IR incidence rate; IRR, incidence rate ratio.