Table 2.
Placental abruption in first pregnancy and long-term mortality risk by cause of death among women with singleton first births in Norway 1967–2002 and Sweden 1973–2003
| Cause of death | Norway | Sweden | Combined | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Total | Deaths | Adjusted hazard ratio (95 % confidence interval)a | Total | Deaths | Adjusted hazard ratio (95 % confidence interval)a | Total | Deaths | Adjusted hazard ratio (95 % confidence interval)a | |
| Total circulatory disease (ischemic, cerebrovascular, other) | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 3848 | 1.00 (Referent) | 1,275,401 | 5371 | 1.0 (Referent) | 2,106,816 | 9219 | 1.0 (Referent) |
| Yes | 4732 | 43 | 1.8 (1.3, 2.4) | 6249 | 46 | 1.7 (1.2, 2.3) | 10,981 | 89 | 1.7 (1.4, 2.2) |
| Sub-categories of circulatory disease | |||||||||
| Cardiovascular (ischemic, cerebrovascular) | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 2525 | 1.00 (Referent) | 1,275,401 | 2873 | 1.0 (Referent) | 2,106,816 | 5398 | 1.0 (Referent) |
| Yes | 4732 | 31 | 1.9 (1.3, 2.8) | 6249 | 24 | 1.6 (1.0, 2.5) | 10,981 | 55 | 1.8 (1.3, 2.4) |
| Ischemic heart disease | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 1298 | 1.0 (Referent) | 1,275,401 | 1417 | 1.0 (Referent) | 2,106,816 | 2715 | 1.0 (Referent) |
| Yes | 4732 | 14 | 1.8 (1.0, 3.0) | 6249 | 17 | 2.3 (1.3, 3.8) | 10,981 | 31 | 2.0 (1.4, 2.9) |
| Cerebrovascular disease | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 1270 | 1.00 (Referent) | 1,275,401 | 1532 | 1.0 (Referent) | 2,106,816 | 2802 | 1.0 (Referent) |
| Yes | 4732 | 17 | 2.0 (1.2, 3.4) | 6249 | 8 | 1.0 (0.4, 2.2) | 10,981 | 25 | 1.6 (1.0, 2.4) |
| Other circulatory disease | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 1323 | 1.00 (Referent) | 1,275,401 | 2498 | 1.0 (Referent) | 2,106,816 | 3821 | 1.0 (Referent) |
| Yes | 4732 | 12 | 1.5 (0.9, 2.7) | 6249 | 22 | 1.8 (1.1, 2.8) | 10,981 | 34 | 1.7 (1.2, 2.4) |
| Non-circulatory disease | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 18,983 | 1.00 (Referent) | 1,275,401 | 21,381 | 1.0 (Referent) | 2,106,816 | 40,364 | 1.0 (Referent) |
| Yes | 4732 | 135 | 1.2 (1.0, 1.4) | 6249 | 137 | 1.2 (1.0, 1.4) | 10,981 | 272 | 1.2 (1.0, 1.3) |
| Total mortality | |||||||||
| Placental abruption | |||||||||
| No | 831,415 | 22,831 | 1.0 (Referent) | 1,275,401 | 26,752 | 1.0 (Referent) | 2,106,816 | 49,583 | 1.0 (Referent) |
| Yes | 4732 | 178 | 1.3 (1.1, 1.5) | 6249 | 183 | 1.3 (1.1, 1.5) | 10,981 | 361 | 1.3 (1.1, 1.4) |
aAdjusted for mother’s age at first birth, education (4 levels), and birth year of child; combined estimates further adjusted for country