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Table 1 General characteristics of study subjects

From: Association of maternal omega-6 fatty acid intake with infant birth outcomes: Korean Mothers and Children’s Environmental Health (MOCEH)

  n Mean ± SD   Range
Pregnant women
 Age, y 1326 30.2 ± 3.7   18–45
 Height, cm 1300 161.2 ± 4.8   146–180
 Weight, kg
  Pre-pregnancy 1316 55.3 ± 8.5   39–94
  Pregnancy 1258 59.6 ± 9.3   37–117
 Body mass index, kg/m2
  Pre-pregnancy 1292 21.3 ± 3.1   15.8–42.8
  Pregnancy 1248 22.9 ± 3.4   15.8–43.5
 Parity 1138    
 Primigravida, n(%)    638(56.1)  
 Multigravida, n(%)    500(43.9)  
 Education, n(%) 1276    
  ≤ High school    342(26.8)  
  ≤ University    852(66.8)  
  ≥ Graduate school    82(6.4)  
 Family monthly income(USD), n(%) 1253    
  < 2000    339(27.1)  
  2000 ≤ and < 4000    675(53.9)  
  ≥ 4000    239(19.1)  
 Supplement user, n(%) 1405   799(56.9)  
 Cigarette smoker, current, n(%) 1315   12(0.9)  
 Secondhand smoking exposer, n(%) 1237   179(14.5)  
 Urinary cotinine, μg/g creatinine 1323 45.3 ± 312.1   0–5882
 Alcohol drinker, current, n(%) 1237   67(5.4)  
 Daily dietary intake 1407    
  Energy, kcal/day   1760.4 ± 494.9   
  Fat, g/day   46.2 ± 23.7   
Neonates
 Gestational age at delivery, days 1262 274.8 ± 10.3   191–294
 Birth weight, g 1291 3262.5 ± 427.0   500–4650
 Birth length, cm 1201 50.5 ± 2.5   26–38.5
 Gender 1296    
  Boys, n(%)    674(52.0)  
  Girls, n(%)    622(48.0)