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Table 1 Population characteristics of 75 mother–infant pairs

From: Effects of maternal dioxin exposure on newborn size at birth among Japanese mother–infant pairs

Study population characteristics

Values

Mothers

  Agea (years)

29.8 (4.0, 20–38)

  Heighta (cm)

158.0 (4.6, 147–171)

  Weight before pregnancya (kg)

52.5 (7.8, 41–96)

  BMI before pregnancya

21.0 (2.7, 17.0–34.0)

  Weight (kg) before deliverya

61.5 (7.8, 44.5–98)

  BMI before deliverya

24.6 (2.7, 19.8–34.7)

  Primipara, n (%)

40 (53.3)

  Delivery by cesarian section, n (%)

9 (12.0)

  Smoking habit before pregnancy, n (%)

11 (14.7)

  Smoking habit during pregnancy, n (%)

2 (2.7)

  Alcohol consumption before pregnancy, n (%)

24 (32.0)

  Alcohol consumption during pregnancy, n (%)

6 (8.0)

  Occupation (house-wife), n (%)

54 (72.0)

Infants

  Gestational age (weeks)a

38.9 (1.5, 34–42)

  Sex, number of boys, (sex ratio)

37 (0.97)

  Lengtha (cm)

49.5 (2.0, 42–53)

  Weighta (g)

3,075 (440.5, 2028–4052)

  Chest circumferencea (cm)

32.0 (2.1, 27–37.5)

  Head circumferencea (cm)

33.2 (1.4, 30–36)

  1. BMI, Body mass index
  2. aValues are given as the mean. Values presented in parenthesis are the standard deviation followed by the minimum–maximum values