Table 2 The risk of a VTE during the postpartum period, as a function of the time after delivery
From: Case-crossover study to examine the change in postpartum risk of pulmonary embolism over time
Time period (days after delivery) | Case period Number of events b (rate/100,000 deliveries) | Control periods Number of events a, b (rate/100,000 deliveries) | OR b [95%CI] |
|---|---|---|---|
0–13 | 387 (10.8) | 22.4 (0.6) | 17.2 [14.0–21.3] |
14–27 | 259 (7.2) | 23.0 (0.6) | 11.2 [9.0–14.0] |
28–41 | 139 (3.8) | 22.6 (0.6) | 6.1 [4.7–7.8] |
42–55 | 85 (2.3) | 22.0 (0.6) | 3.8 [2.9–5.1] |
56–69 | 62 (1.7) | 22.8 (0.6) | 2.7 [1.9–3.7] |
70–83 | 48 (1.3) | 24.4 (0.6) | 1.9 [1.4–2.7] |
84–97 | 36 (1.0) | 25.4 (0.7) | 1.4 [0.9–2.0] |
98–111 | 31 (0.8) | 27.6 (0.7) | 1.1 [0.7–1.6] |
112–125 | 24 (0.6) | 25.6 (0.7) | 0.9 [0.6–1.4] |
126–139 | 24 (0.6) | 27.2 (0.7) | 0.8 [0.5–1.3] |