Table 8.
Frequencies and percentages for preterm and very preterm births and low birthweight percentiles from singleton births across cohorts
| AOF | APrON | FAMILY | OBS | 3D | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (N = 3,125)a | (N = 1,866) | (N = 765) | (N = 1,347) | (N = 2,251) | (N = 9,354) | |||||||
| n | % | n | % | n | % | n | % | n | % | n | % | |
| Gestational age < 37 weeks | 199 | 6.4 | 88 | 4.7 | 53 | 6.9 | 71 | 5.3 | 152 | 6.8 | 563 | 6.0 |
| Gestational age < 32 weeks | 22 | 0.7 | 8 | 0.4 | 8 | 1.1 | 6 | 0.5 | 35 | 1.6 | 79 | 0.8 |
| Birthweight < 10th percentileb | 375 | 12.0 | 232 | 12.4 | 68 | 8.9 | 179 | 13.3 | 264 | 11.7 | 1118 | 12.0 |
| Birthweight < 3rd percentile | 96 | 3.1 | 59 | 3.2 | 19 | 2.5 | 35 | 2.6 | 75 | 3.3 | 284 | 3.0 |
a N = Number of participants from each cohort with non-missing values for the harmonized variable ‘gestational age at delivery’
b Percentiles based on reference ranges adjusted for gestational age and infant sex from Canadian singletons described by Kramer et al. 2001 [45]