Table 5.
Odds ratios of cervical cancer (aged 29+) among women having abnormalities compared to women having normal tests in the past two screening rounds, and stage distributions of cases by screening history
| Screening history1 | No. of case sub. | No. of control sub. | OR | OR adjusted2 | Stage distribution of cases | |||
|---|---|---|---|---|---|---|---|---|
| Stage IA (%) | Stage IB (%) | Stage II+ (%) | PropOR (95%CI)3 | |||||
| Nor.–Nor. | 651 | 48,742 | Ref. | Ref. | 116 (17.8) | 343 (52.7) | 192 (29.5) | Ref. |
| Abn.–Nor. | 85 | 1,605 | 4.1 (3.2–5.1) | 4.0 (3.2–5.1) | 19 (22.4) | 45 (52.9) | 21 (24.7) | 0.8 (0.5–1.2) |
| Abn.–Unscr. | 84 | 283 | 24.1 (18.6–31.1) | 23.7 (18.3–30.7) | 21 (25.0) | 34 (40.5) | 29 (34.5) | 1.0 (0.7–1.6) |
| Nor.–Abn. | 237 | 1,166 | 15.4 (13.1–18.0) | 15.3 (13.1–18.0) | 89 (37.6) | 119 (50.2) | 29 (12.2) | 0.4 (0.3–0.6) |
| Unscr.–Abn. | 128 | 474 | 21.3 (17.2–26.3) | 21.1 (17.1–26.1) | 52 (40.6) | 51 (39.8) | 25 (19.5) | 0.5 (0.3–0.7) |
| Abn.–Abn. | 72 | 316 | 17.5(13.4–22.8) | 17.4(13.3–22.8) | 25 (34.7) | 36 (50.0) | 11 (15.3) | 0.5 (0.3–0.8) |
1
Left‐hand side of hyphen represents the previous screening round, and right‐hand side represents the most recent screening round.
2
Adjusted for education and age group.
3
Proportional odds ratio, measuring the risk of being diagnosed with progressively higher staged cervical cancer, adjusted for age group.
Abbreviations: Abn., abnormal; Nor., normal; Unscr., unscreened.