Baseline characteristics of the mothers by education in years
| Years of education | ||||
|---|---|---|---|---|
| Characteristic | Total | Less than 11 | 11 or More | Less than 11:11 or more ratio |
| Mothers: N, (% row) | 652 320 (100) | 311 374 (48) | 340 946 (52) | 0.9 |
| Mothers with perinatal losses: n, (% of N) | 18 636 (2.9) | 10 586 (3.4) | 8050 (2.4) | 1.4 |
| Mothers with one perinatal loss (% of n) | 17 491 (94) | 9883 (93) | 7608 (95) | 1.0 |
| Mothers with two or more perinatal losses (% of n) | 1145 (6.1) | 703 (6.6) | 442 (5.5) | 1.2 |
| Median year of birth (IQR) | 1957 (1950–1964) | 1954 (1948–1961) | 1960 (1953–1966) | − |
| Median age at death (IQR) | 52 (47–58) | 53 (47–58) | 52 (46–58) | − |
| Median age at first birth (IQR) | 24 (21–27) | 22 (20–25) | 25 (22–28) | − |
| Total no. of deaths: X (% of N)* | 16 490 (2.5) | 11 703 (3.8) | 4787 (1.4) | 2.7 |
| Total no. of deaths in mothers with perinatal losses (% of X)* | 769 (4.7) | 603 (5.2) | 166 (3.4) | 1.5 |
| Cardiovascular deaths: x1, (% of N)*† | 1895 (0.3) | 1499 (0.5) | 396 (0.1) | 5.0 |
| Cardiovascular deaths in mothers with perinatal losses (% of x1)*† | 115 (6.1) | 104 (6.9) | 11 (2.8) | 2.5 |
| Non-cardiovascular deaths: x2, (% of N)*‡ | 14 595 (2.2) | 10 204 (3.3) | 4391 (1.3) | 2.5 |
| Non-cardiovascular deaths in mothers with perinatal losses (% of x2)*‡ | 654 (4.5) | 499 (4.9) | 155 (3.5) | 1.4 |
*Data are presented for age-specific deaths, 40–69 years.
†Cardiovascular causes of death: ischaemic heart disease and cerebrovascular disease combined (see the Materials and methods section).
‡Non-cardiovascular causes of death: all other causes than cardiovascular causes (see the Materials and methods section).