Time interval and surgery | Number of patients | Risk, % (95% CI)a | aOR (95% CI)b | P value |
---|---|---|---|---|
Cholecystectomy | (n = 378) |  |  |  |
 13–24 months before surgery | 64 | 16.9 (13.1–20.7) | Reference | – |
 1–12 months before surgery | 129 | 34.1 (29.3–38.9) | 2.13 (1.56–2.91) | <0.0001 |
 0–12 months after surgery | 135 | 35.7 (30.9–40.6) | 2.24 (1.65–3.06) | <0.0001 |
 13–24 months after surgery | 67 | 17.7 (13.9–21.6) | 1.05 (0.74–1.49) | 0.79 |
Hysterectomy | (n = 112) |  |  |  |
 13–24 months before surgery | 20 | 17.9 (10.7–25.1) | Reference | – |
 1–12 months before surgery | 42 | 37.5 (28.4–46.6) | 2.26 (1.29–3.95) | 0.004 |
 0–12 months after surgery | 34 | 30.4 (21.7–39.0) | 1.78 (1.002–3.18) | 0.049 |
 13–24 months after surgery | 21 | 18.8 (11.4–26.1) | 1.05 (0.56–1.99) | 0.87 |
Spinal fusion | (n = 61) |  |  |  |
 13–24 months before surgery | 11 | 18.0 (8.1–28.0) | Reference | – |
 1–12 months before surgery | 20 | 32.8 (20.7–44.9) | 1.92 (0.89–4.14) | 0.10 |
 0–12 months after surgery | 17 | 27.9 (16.3–39.4) | 1.60 (0.73–3.53) | 0.24 |
 13–24 months after surgery | 11 | 18.0 (8.1–28.0) | 1.00 (0.42–2.37) | 0.99 |
Mastectomy | (n = 30) |  |  |  |
 13–24 months before surgery | 5 | 16.7 (25.1–30.8) | Reference | – |
 1–12 months before surgery | 11 | 36.7 (18.4–55.0) | 2.34 (0.78–6.98) | 0.13 |
 0–12 months after surgery | 9 | 30.0 (12.6–47.4) | 1.87 (0.61–5.78) | 0.28 |
 13–24 months after surgery | 5 | 16.7 (25.1–30.8) | 1.00 (0.28–3.55) | 0.99 |