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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)
  1. aamong women with available pre-pregnancy BMI