Table 1.
Cohorts and data used in the MOBAND-CP collaboration
| Denmark | Norway | |
|---|---|---|
| Birth cohort | DNBC | MoBa |
| Recruitment | ||
| Years | 1995–2002 | 1999–2008 |
| Time in pregnancy | Week 6–10 | Week 13–17 |
| Participating women (n) | 91 385 | 95 093 |
| Recruited pregnancies (n) | 100 417 | 112 509 |
| Pregnancies resulting in live birth (n) | 94 747 | 111 618 |
| Live births (singletons and multiples) | 96 836 | 113 564 |
| Stillbirths | 329 | 281 |
| Data used (from pregnancies resulting in live birth) | ||
| 1st questionnaire (approximately week 17) | 101 181 | |
| 1st interview (approximately week 16) | 88 750 | |
| 3rd questionnaire (approximately week 30) | 93 844 | |
| 2nd interview (approximately week 31) | 86 155 | |
| Questionnaire 6 months postpartum | 88 106 | |
| Interview 6 months postpartum | 70 281 | |
| Interview 18 months postpartum | 66 705 | |
| Verified CP cases (per 1000 live births) | 191 (2.0) | 247 (2.2) |
| Spastic unilateral (per 100 CP cases) | 71 (37) | 98 (40) |
| Spastic bilateral (per 100 CP cases) | 97 (51) | 107 (43) |
| Dyskinetic (per 100 CP cases) | 17 (9) | 21 (9) |
| Ataxic (per 100 CP cases) | 3 (2) | 14 (6) |
| Not classified (per 100 CP cases) | 3 (2) | 7 (3) |
CP, cerebral palsy; DNBC, Danish National Birth Cohort; MoBa, Norwegian Mother and Child Cohort Study.