Incidence rates of VTE per 100 000 person-years and IRRs during different periods of postpartum and around delivery
| . | 1-3 wk postpartum . | 4-6 wk postpartum . | 7-12 wk postpartum . | ||||||
|---|---|---|---|---|---|---|---|---|---|
| VTE . | Rate (95% CI)* . | IRR (95% CI)† . | VTE . | Rate (95% CI)* . | IRR (95% CI)† . | VTE . | Rate (95% CI)* . | IRR (95% CI)† . | |
| BMI ≥ 30 kg/m2 | |||||||||
| No | 40 | 598 (438-815) | 1.00 | 9 | 161 (84-311) | 1.00 | 11 | 101 (56-182) | 1.00 |
| Yes | 27 | 1650 (1131-2406) | 2.74 (1.66-4.52) | 10 | 735 (395-1366) | 4.18 (1.65-10.5) | 3 | 112 (36-350) | 0.97 (0.4-3.88) |
| Preeclampsia/eclampsia | |||||||||
| No | 119 | 814 (680-974) | 1.00 | 27 | 221 (151-322) | 1.00 | 18 | 75 (47-119) | 1.00 |
| Yes | 8 | 2263 (1131-4525) | 2.54 (1.23-5.26) | 4 | 1360 (510-3623) | 5.41 (1.84-15.8) | 2 | 349 (87-1397) | 4.76 (1.05-21.6) |
| Length of gestation | |||||||||
| Normal (36-42 wk) | 98 | 788 (646-960) | 1.00 | 22 | 211 (139-321) | 1.00 | 15 | 73 (44-122) | 1.00 |
| Preterm (<37 wk) | 20 | 1736 (1120-2691) | 2.04 (1.26-3.28) | 5 | 519 (216-1247) | 1.92 (0.77-4.78) | 4 | 213 (80-569) | 2.81 (0.86-9.16) |
| Cesarean section | |||||||||
| No | 75 | 662 (528-831) | 1.00 | 9 | 95 (49-182) | 1.00 | 11 | 59 (33-107) | 1.00 |
| Yes | 52 | 1425 (1086-1870) | 1.89 (1.30-2.74) | 22 | 722 (475-1096) | 6.99 (3.07-15.9) | 9 | 151 (78-290) | 2.22 (0.85-5.79) |
| Postpartum hemorrhage | |||||||||
| No | 103 | 756 (623-917) | 1.00 | 27 | 237 (163-346) | 1.00 | 18 | 81 (51-129) | 1.00 |
| Yes | 24 | 1778 (1192-2653) | 2.22 (1.42-3.47) | 4 | 347 (130-353) | 1.38 (0.47-4.04) | 2 | 88 (22-353) | 1.00 (0.22-4.46) |
| Postpartum acute systemic infection | |||||||||
| No | 114 | 775 (645-932) | 1.00 | 28 | 230 (158-333) | 1.00 | 18 | 76 (48-121) | 1.00 |
| Yes | 13 | 4813 (279-828) | 5.99 (3.36-10.6) | 3 | 899 (289-2787) | 3.56 (1.08-11.7) | 2 | 253 (63-1011) | 3.27 (0.73-14.6) |
| . | 1-3 wk postpartum . | 4-6 wk postpartum . | 7-12 wk postpartum . | ||||||
|---|---|---|---|---|---|---|---|---|---|
| VTE . | Rate (95% CI)* . | IRR (95% CI)† . | VTE . | Rate (95% CI)* . | IRR (95% CI)† . | VTE . | Rate (95% CI)* . | IRR (95% CI)† . | |
| BMI ≥ 30 kg/m2 | |||||||||
| No | 40 | 598 (438-815) | 1.00 | 9 | 161 (84-311) | 1.00 | 11 | 101 (56-182) | 1.00 |
| Yes | 27 | 1650 (1131-2406) | 2.74 (1.66-4.52) | 10 | 735 (395-1366) | 4.18 (1.65-10.5) | 3 | 112 (36-350) | 0.97 (0.4-3.88) |
| Preeclampsia/eclampsia | |||||||||
| No | 119 | 814 (680-974) | 1.00 | 27 | 221 (151-322) | 1.00 | 18 | 75 (47-119) | 1.00 |
| Yes | 8 | 2263 (1131-4525) | 2.54 (1.23-5.26) | 4 | 1360 (510-3623) | 5.41 (1.84-15.8) | 2 | 349 (87-1397) | 4.76 (1.05-21.6) |
| Length of gestation | |||||||||
| Normal (36-42 wk) | 98 | 788 (646-960) | 1.00 | 22 | 211 (139-321) | 1.00 | 15 | 73 (44-122) | 1.00 |
| Preterm (<37 wk) | 20 | 1736 (1120-2691) | 2.04 (1.26-3.28) | 5 | 519 (216-1247) | 1.92 (0.77-4.78) | 4 | 213 (80-569) | 2.81 (0.86-9.16) |
| Cesarean section | |||||||||
| No | 75 | 662 (528-831) | 1.00 | 9 | 95 (49-182) | 1.00 | 11 | 59 (33-107) | 1.00 |
| Yes | 52 | 1425 (1086-1870) | 1.89 (1.30-2.74) | 22 | 722 (475-1096) | 6.99 (3.07-15.9) | 9 | 151 (78-290) | 2.22 (0.85-5.79) |
| Postpartum hemorrhage | |||||||||
| No | 103 | 756 (623-917) | 1.00 | 27 | 237 (163-346) | 1.00 | 18 | 81 (51-129) | 1.00 |
| Yes | 24 | 1778 (1192-2653) | 2.22 (1.42-3.47) | 4 | 347 (130-353) | 1.38 (0.47-4.04) | 2 | 88 (22-353) | 1.00 (0.22-4.46) |
| Postpartum acute systemic infection | |||||||||
| No | 114 | 775 (645-932) | 1.00 | 28 | 230 (158-333) | 1.00 | 18 | 76 (48-121) | 1.00 |
| Yes | 13 | 4813 (279-828) | 5.99 (3.36-10.6) | 3 | 899 (289-2787) | 3.56 (1.08-11.7) | 2 | 253 (63-1011) | 3.27 (0.73-14.6) |