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Table 1 Characteristics of mothers and newborns (n = 3267)

From: Temperature during pregnancy influences the fetal growth and birth size

  Number Percent
Characteristics of mothers
 Age in years, n = 3264
  <20 486 14.9
  20 to <30 1868 57.2
  ≥30 910 27.9
 Early-pregnancy BMI (kg/m2), n = 3257
  <18.5 916 28.0
  18.5 to <25.0 2151 65.9
  ≥25.0 200 6.1
 Education years
  0 1056 32.3
  1~6 874 26.8
  ≥7 1337 40.9
 Parity, n = 3252
  0 1030 31.7
  1 914 28.1
  2 699 21.5
  3 358 11.0
  ≥4 251 7.7
Characteristics of newborns
 Male 1663 50.9
 Birth weight (<2500 g) 997 30.5
 Birth length (<47 cm), n = 3256 999 30.7
 Gestation week at birth <37 259 7.9
 Season at birth
  Winter (October to February) 1564 47.9
  Hot and dry (March to May) 694 21.2
  Monsoon (June to September) 1009 30.9