Maternal and newborn characteristics (n=1 325 660)
| Characteristic | Motor vehicle crash | Motor vehicle crash |
|---|---|---|
| Present | Absent | |
| (n=7933) | (n=1 317 727) | |
| Age | ||
| <25 | 2112 (27) | 225 742 (17) |
| 25–35 | 4887 (62) | 884 878 (67) |
| >35 | 934 (12) | 207 107 (16) |
| Socioeconomic status* | ||
| Higher | 2757 (35) | 488 943 (37) |
| Middle | 1610 (20) | 266 435 (20) |
| Lower | 3566 (45) | 562 349 (43) |
| Home location | ||
| Urban | 6891 (87) | 1 182 313 (90) |
| Rural | 1042 (13) | 135 414 (10) |
| Enrolment interval | ||
| First 5 years | 4011 (51) | 645 370 (49) |
| Second 5 years | 3922 (49) | 672 357 (51) |
| Prenatal care† | ||
| ≥13 clinic encounters | 7422 (94) | 1 147 405 (87) |
| ≥1 hospital admission | 3253 (41) | 438 570 (33) |
| Parity | ||
| Primiparous | 3968 (50) | 597 344 (45) |
| Multiparous | 3965 (50) | 720 383 (55) |
| Pregnancy duration | ||
| Preterm‡ | 548 (7) | 86 887 (7) |
| At-term | 6481 (82) | 1 080 323 (82) |
| Post-term § | 904 (11) | 150 517 (11) |
| Mode of delivery | ||
| Vaginal | 5657 (71) | 952 375 (72) |
| Caesarean | 2276 (29) | 365 352 (28) |
| Newborn child | ||
| Male | 3973 (50) | 669 801 (51) |
| Female | 3870 (49) | 635 266 (48) |
| Not recorded | 90 (1) | 12 660 (1) |
| Length of hospital stay | ||
| ≤3 days | 4739 (60) | 826 711 (63) |
| ≥4 days | 3194 (40) | 491 016 (37) |
Values are count (percentage) of each group.
Each pregnancy counted as a separate event.
*Based on median neighbourhood income quintile.
†In previous year.
‡Maternal ICD-10 code O60.
§Maternal ICD-10 code O48.
ICD, International Statistical Classification of Diseases.