Table 1 —

Maternal characteristics

Sea level
High altitude
PregnantNonpregnantPregnantNonpregnant
n123319222
Gestation (weeks)25.3 (8.3)24.4 (7.5)
Age (years)25.5 (7.0)*29.4 (6.2)27.7 (5.8)*30.1 (6.0)
BMI (kg/m2)24.3 (4.1)23.0 (3.7)*24.4 (3.0)26.7 (3.3)*
Secondary school72.373
  • Data are n, mean (1 SD), or %.

  • *

    * P < 0.05 for the difference between sea level and high altitude;

  • P < 0.05 for the difference between pregnant and nonpregnant groups.