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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Am J Obstet Gynecol. 2014 Jun 19;211(6):654.e1–654.e9. doi: 10.1016/j.ajog.2014.06.037

Table 1.

Study population characteristics n % mean SD missing data

n % mean SD missing data
Infant characteristics
Gestational age 535 39.0 1.0
Birth weight 535 3486.6 696.6
  AGA 281 52.5
  LGA 140 26.2
  SGA 114 21.3
Sex
  Male 270 50.5
  Female 265 49.5
Delivery Method
  C-Section 273 51
  Vaginal 262 49
Genotype (rs2167270)
  G/G,G/A 457 85.4
  A/A 78 14.6
Maternal characteristics
Age 535 29.6 5.6
BMI (Kg/m2) 529 26.8 7.1 6
Prepregnancy obesity 6
  No (BMI <30) 394 74.5
  Yes (BMI ≥ 30) 135 25.5
Gestational diabetes mellitus 56
  No 432 90.2
  Yes 47 9.8
Gestational weight gain 9
  Inadequate 101 19.2
  Adequate 135 25.7
  Excessive 290 55.1
Ethnicity 3
  Other 138 25.9
  White 394 74.1
Tobacco use during pregnancy 7
  No 502 95.1
  Yes 26 4.9
History diabetes type I 59
  No 471 98.9
  Yes 5 1.1
History diabetes type II 59
  No 472 99.2
  Yes 4 0.8
Pregnancy hypertension 10
  No 490 93.3
  Yes 35 6.7

SD, standard deviation; AGA, adequate for gestational age, LGA, large for gestational age, SGA, small for gestational age