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Table 1 Demographic characteristics of the study sample (N = 698)

From: Determinants of rapid weight gain during infancy: baseline results from the NOURISH randomised controlled trial

Characteristic Included in final analysis (n = 612) Excluded because of missing data (n = 86)
Maternal    
  Mean age (years ± SD) 30.3 ± 5.2 28.6 ± 5.7
  Education, n (%)   
     Tertiary 365 (59.6%) 41 (47.7%)
     Trade or Technical college 141 (23.0%) 19 (22.1%)
     Secondary 106 (17.3%) 26 (30.2%)
  Incomeπ   
     0 ≤ $70,000 276 (46.1%) 35 (52.2%)
     > $70,000 323 (53.9%) 32 (47.8%)
  BMI kg/m2, n (%)   
     Underweight (<18.5) 14 (2.3%) 0 (%)
     Normal weight (18.5-24.9) 299 (49.1%) 36 (44.4%)
     Overweight (25.0-29.9) 193 (31.7%) 24 (29.6%)
     Obese (≥30) 103 (16.9%) 21 (25.9%)
  Maternal smoking during pregnancy, n (%)   
     Yes 71 (11.6%) 14 (16.7%)
     No 541 (88.4%) 70 (83.3%)
Infant    
  Mean birthweight (kg ± SD) 3.5 ± 0.4 3.5 ± 0.4
  Mean age at assessment (months ± SD) 4.3 ± 1.0 4.5 ± 1.0
  Gender   
     Male 305 (49.8%) 39 (45.3%)
     Female 307 (50.2%) 54 7%)
  1. π for income level data sample size was reduced to 599 in included and 67 in excluded group because of missing data (non-response)