Table 1 Maternal and neonatal characteristics of deliveries sampled for chart re-abstraction, British Columbia, 2010–2012
From: Validating the British Columbia Perinatal Data Registry: a chart re-abstraction study
Characteristic | Unweighted sample mean ± SD or n(%) | Weighted sample mean ± SD or n(%) | British Columbia population mean ± SD or n(%) | |
|---|---|---|---|---|
Maternal | N | 1,084 | 87,266 | 87,318 |
Maternal age (years) | 30.6 ± 5.8 | 30.6 ± 5.8 | 30.3 ± 5.5 | |
Parity (nulliparous) | 551 (50.8) | 42,775 (49.0) | 40,835 (46.8) | |
Pre-pregnancy Body Mass Index (kg/m2)a | 25.5 ± 5.8 | 24.6 ± 5.4 | 24.4 ± 5.3 | |
Smoking during pregnancy | 148 (13.7) | 9,372 (10.7) | 7,305 (8.4) | |
Gestational age at delivery (weeks) | 37.8 ± 3.2 | 38.4 ± 2.7 | 38.5 ± 2.5 | |
Newborn | N | 1,142 | 88,720 | 88,759 |
Birthweight (g) | 3,045 ± 710 | 3,211 ± 553 | 3,360 ± 631 | |
Sex (male) | 574 (50.3) | 42,715 (48.1) | 45,393 (51.2) | |
Multiple birth (twin or higher order) | 108 (9.5) | 3,410 (3.9) | 2,864 (3.2) | |