Table 1. Characteristics of the study population according to the death of a child.
| Variables | Exposed to the death of a child | ||
|---|---|---|---|
| Unexposed (n = 6,585,430) | Exposed (n = 126,522) | P * | |
| N (%) | N (%) | ||
| Age/Mean (SD), years | 30.7 (6.6) | 31.2 (7.7) | <0.001 |
| Sex | <0.001 | ||
| Men | 3,085,769 (46.9) | 56,743 (44.8) | |
| Women | 3,499,661 (53.1) | 69,779 (55.2) | |
| Country of birth | <0.001 | ||
| Denmark or Sweden | 5,770,503 (87.6) | 112,364 (88.8) | |
| Other countries | 814,927 (12.4) | 14,158 (11.2) | |
| Year of entry in the study | <0.001 | ||
| Before 1980 | 699,782 (10.6) | 30,495 (24.1) | |
| 1980–1989 | 2,302,881 (35.0) | 62,555 (49.4) | |
| 1990–1999 | 1,369,476 (20.8) | 19,892 (15.7) | |
| 2000–2009 | 1,381,774 (21.0) | 10,406 (8.2) | |
| After 2009 | 831,517 (12.6) | 3,174 (2.5) | |
| Marital status at baseline | <0.001 | ||
| Married or in registered partnership | 3,002,351 (45.6) | 65,738 (52.0) | |
| Single, widowed, or divorced | 2,577,992 (39.1) | 37,437 (29.6) | |
| Missing | 1,005,087 (15.3) | 23,347 (18.4) | |
| Highest education at baseline | <0.001 | ||
| 0–9 years | 1,416,750 (21.5) | 44,124 (34.9) | |
| 10–14 years | 3,584,453 (54.4) | 61,633 (48.7) | |
| ≥15 years | 1,266,295 (19.2) | 15,374 (12.2) | |
| Missing | 317,932 (4.8) | 5,391 (4.3) | |
| Income | <0.001 | ||
| Low tertile | 1,872,611 (28.4) | 34,204 (27.0) | |
| Middle tertile | 1,877,245 (28.5) | 29,699 (23.5) | |
| High tertile | 1,881,875 (28.6) | 27,301 (21.6) | |
| Missing | 953,699 (14.5) | 35,348 (27.9) | |
| History of CVD at baseline† | <0.001 | ||
| No | 6,435,984 (97.7) | 124,072 (98.1) | |
| Yes | 149,446 (2.3) | 2,450 (1.9) | |
| History of psychiatric disorders at baseline | <0.001 | ||
| No | 6,322,878 (96.0) | 121,903 (96.3) | |
| Yes | 262,552 (4.00) | 4,619 (3.7) | |
| Parents’ history of CVD | <0.001 | ||
| No | 3,787,823 (57.5) | 62,495 (49.4) | |
| Yes | 1,580,759 (24.0) | 27,903 (22.1) | |
| Missing | 1,216,848 (18.5) | 36,189 (28.6) | |
| Sibling’s history of CVD | <0.001 | ||
| No | 5,213,542 (79.2) | 88,213 (69.7) | |
| Yes | 155,040 (2.4) | 2,185 (1.7) | |
| Missing | 1,216,848 (18.5) | 36,189 (28.6) | |
| Hypertension before or during pregnancy at baseline‡ | <0.001 | ||
| No | 3,371,167 (96.3) | 67,452 (96.7) | |
| Yes | 114,447 (3.3) | 1,835 (2.6) | |
| Missing | 14,047 (0.4) | 492 (0.7) | |
| Diabetes before or during pregnancy at baseline‡ | <0.001 | ||
| No | 3,460,882 (98.9) | 68,911 (98.8) | |
| Yes | 24,732 (0.7) | 376 (0.5) | |
| Missing | 14,047 (0.4) | 492 (0.7) | |
| Smoking in early pregnancy at baseline‡ | <0.001 | ||
| No | 1,845,976 (52.7) | 19,519 (28.0) | |
| Yes | 397,433 (11.4) | 8,105 (11.6) | |
| Missing | 1,256,252 (35.9) | 42,155 (60.4) | |
| Obesity in early pregnancy at baseline‡ | 0.006 | ||
| No | 1,515,034 (43.3) | 16,615 (23.8) | |
| Yes | 125,263 (3.6) | 1,267 (1.8) | |
| Missing | 1,859,364 (53.1) | 51,897 (74.4) | |
CVD, cardiovascular diseases; IHD, ischemic heart disease; SD, standard deviation.
*The p-values corresponds to differences between the exposure groups in Student t tests in case of continuous variables and chi-squared tests in case of categorical variables.
†Except for IHDs.
‡Available only for the women.