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Table 1 Maternal demographic and clinical characteristics in the study area (N = 195,500)

From: Geospatial analyses to identify clusters of adverse antenatal factors for targeted interventions

  n (%)
Age-group
  <20 year 6431 (3.3)
  20 – <35 years 149,762 (76.6)
  35+ years 39,307 (20.1)
Country of birth
  Australian 106,769 (54.6)
  Overseas 88,731 (45.4)
Index of Relative Socio-economic Disadvantage
(missing = 1,883)
  Most disadvantage 64,541 (33.3)
  Middle disadvantage and Least disadvantage 129078 (66.7)
Number of babies
  Multiple 5,886 (3.0)
  Singleton 189,614 (97.0)
Primiparous (missing = 448)
  Yes 83,263 (42.6)
  No 111,789 (57.2)
First antenatal visit (missing = 3,049)
  ≥10 weeks 60,041 (30.7)
  <10 weeks 132,410 (67.7)
Smoking during pregnancy (missing = 1,613)
  Yes 22,635 (11.6)
  No 171,252 (87.6)