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Table 1 Characteristics of the mother, delivery and pregnancy, and early-life environment (n = 168 mothers)

From: Early-life residential green spaces and traffic exposure in association with young adult body composition: a longitudinal birth cohort study of twins

 

Total

 

Type of twin

  
 

n/N

 

MZMC n = 53 (31.5%)

MZDC n = 54 (32.1%)

DZ n = 61 (36.3%)

Maternal, pregnancy and delivery characteristics

     

 Maternal age (years), median (p25-p75)

163/168

27.0 (24.0–30.0)

26.0 (24.0–30.0)

27.0 (25.0–29.0)

28.0 (24.8–31.0)

 Parity (primi), n (%)

167/168

78 (46.7%)

24 (45.3%)

26 (48.1%)

28 (46.7%)

 Maternal weight before pregnancy (kg), median (p25-p75)

151/168

58.0 (53.5–63.0)

58.0 (54.5–62.3)

56.0 (52.0–60.3)

60.0 (53.3–67.0)

 Maternal weight gain during pregnancy (kg), median (p25-p75)

135/168

13.0 (10.0–17.0)

13.2 (11.1–15.0)

13.0 (10.0–17.3)

12.0 (10.0–17.0)

 Maternal height (cm), mean + SD

150/168

164 + 6.3

165 + 6.0

163 + 6.3

165 + 6.4

 Gestational age (weeks), median (p25-p75)

166/168

38 (36.0–39.0)

37.0 (36.0–38.0)

38.0 (36.0–39.0)

38.0 (36.0–39.0)

 Delivery mode (c-section), n (%)

141/168

17 (12.1%)

2 (4.7%)*

8 (17.0%)*

7 (13.7%)*

 Maternal education, n (%)

153/168

    

  No education or primary education

 

25 (16.3%)

12 (25.5%)*

4 (8.3%)*

9 (15.5%)*

  Lower secondary education

 

31 (20.3%)

6 (12.8%)*

12 (25.0%)*

13 (22.4%)*

  Higher secondary education and tertiary education

 

97 (63.4%)

29 (61.7%)*

32 (66.7%)*

36 (62.1%)*

 Smoking during pregnancy, n (%)

156/168

21 (86.5%)

5 (10.2%)

7 (14.3%)

9 (15.5%)

Environmental exposures and neighborhood characteristics during pregnancy and early life

  

 Neighborhood household income (euro), median (p25-p75)

168/168

1800 (1646–2127)

1738 (1698–1926)

1863 (1641–2178)

1800 (1634–2201)

  Low-income household

 

41 (24.4%)

11 (20.8%)

14 (25.9%)

16 (26.2%)

  Middle-income household

 

85 (50.6%)

32 (60.4%)

24 (44.4%)

29 (47.5%)

  High-income household

 

42 (25%)

10 (18.9%)

16 (29.6%)

16 (26.2%)

 Distance from residence to nearest major road (m), median (p25-p75)

168/168

276 (110–618)

276 (124–617)

271 (120–632)

321 (95–552)

 Distance from residence to nearest highway (m), median (p25-p75)

168/168

3627 (2071–7670)

4399 (2124–7542)

5203 (2398–10,324)

3125 (2017–5401)

 Green spaces within a 5000 m buffer from the home address (%), median (p25-p75)

168/168

3.9 (2.9–5.6)

4.1 (2.8–5.5)

4.4 (3.1–6.4)

3.8 (3.0–4.9)

  1. Abbreviations: n number without missing data, N total number of pregnancies and residences included, MZMC monozygotic monochorionic, MZDC monozygotic dichorionic, DZ dizygotic, p25 25th percentile, p75 75th percentile. *p-value< 0.05 of Chi-square test or Kruskall-Wallis test