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Table 1 Characteristics of the study population (count and percent of the total sample). N = 863

From: Epigenetic gestational age acceleration: a prospective cohort study investigating associations with familial, sociodemographic and birth characteristics

  Count (n) Percentage
Female 442 51.22
Maternal smoking during pregnancy
 Never smoker 513 60.64
 Former smoker 238 28.13
 Current smoker 95 11.23
Paternal smoking
 Never smoker 479 70.34
 Former smoker 28 4.11
 Current smoker 174 25.55
Maternal alcohol consumption during pregnancy
 Heavy/binge drinker 113 13.40
 Light/moderate drinker 380 45.08
 Pregnancy abstainer 308 36.54
 Never drinker 42 4.98
Paternal alcohol consumption during pregnancy
 Heavy/binge drinker 583 83.05
 Light/moderate drinker 97 13.82
 Never drinker 22 3.13
Maternal depression (EPDS)—likely to be depressed 231 27.83
Paternal depression (EPDS)—likely to be depressed 61 9.36
Maternal pre-pregnancy BMI
 Under/normal weight 651 81.07
 Overweight 114 14.20
 Obese 38 4.73
Paternal BMI   
 Under/normal weight 357 54.42
 Overweight 250 38.11
 Obese 49 7.47
Parental relationship status during pregnancy
 Married 709 83.22
 Cohabiting 114 13.38
 Single 29 3.40
Parity   
 0 702 83.87
 1 102 12.19
 2+ 33 3.94
Maternal age (years)
 35+ 115 13.33
 25–34 640 74.16
 15–24 108 12.51
Paternal age (years)
 35+ 219 27.17
 25–34 542 67.25
 15–24 45 5.58
  1. Percentages reflect the proportion of the total sample
  2. EPDS Edinburgh Postnatal Depression Scale, BMI body mass index