Subsequent cerebral palsy diagnosis
| Total cases of cerebral palsy | Relative risk after crash | CI | |
|---|---|---|---|
| Full cohort | 2328 | 1.29 | 0.84 to 2.10 |
| Age | |||
| <25 | 451 | 1.20 | 0.57 to 3.06 |
| 25–35 | 1479 | 1.48 | 0.88 to 2.69 |
| >35 | 398 | 0.56 | 0.17 to 4.16 |
| Socioeconomic | |||
| Higher | 794 | 1.58 | 0.82 to 3.47 |
| Middle | 478 | 0.35 | 0.10 to 2.58 |
| Lower | 1056 | 1.51 | 0.86 to 2.91 |
| Home location | |||
| Urban | 2087 | 1.41 | 0.91 to 2.32 |
| Rural | 241 | 0.54 | 0.16 to 4.04 |
| Enrolment interval | |||
| First 5 years | 1179 | 1.65 | 0.99 to 3.01 |
| Second 5 years | 1149 | 0.90 | 0.45 to 2.11 |
| Prenatal care | |||
| ≥13 clinic visits | 1982 | 1.26 | 0.80 to 2.11 |
| ≥1 admissions | 1069 | 1.14 | 0.64 to 2.29 |
| Parity | |||
| Primiparous | 1179 | 1.16 | 0.64 to 2.32 |
| Multiparous | 1149 | 1.43 | 0.80 to 2.87 |
| Pregnancy duration | |||
| Preterm | 850 | 1.89 | 1.07 to 3.66 |
| At-term | 1314 | 0.76 | 0.38 to 1.79 |
| Post-term | 164 | 2.06 | 0.73 to 8.94 |
| Mode of delivery | |||
| Vaginal | 1285 | 1.05 | 0.57 to 2.20 |
| Caesarean | 1043 | 1.55 | 0.89 to 3.00 |
| Newborn child | |||
| Male | 1339 | 1.52 | 0.91 to 2.77 |
| Female | 989 | 1.00 | 0.50 to 2.34 |
| Length of stay | |||
| ≤3 days | 1026 | 1.37 | 0.74 to 2.86 |
| ≥4 days | 1302 | 1.19 | 0.68 to 2.29 |
Estimates provide results from subgroup analyses (full cohort listed at top).
Referent based on pregnancies with no motor vehicle crash.
Relative risk estimate from proportional hazards analysis (Cox regression).
CI based on 95% limits using normal approximation (Wald statistic).