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Table 1 Characteristics of the mothers at sea level and at high altitude (4340 m).

From: Arterial oxygen saturation in healthy newborns delivered at term in Cerro de Pasco (4340 m) and Lima (150 m)

  Lima (n = 131) Cerro de Pasco (n = 37)
  mean ± SEM mean ± SEM
Age (years) 25.15 ± 0.58 25.46 ± 0.89
Body Weight (Kg) 54.98 ± 0.69 53.31 ± 1.13
Height (m) 1.55 ± 0.01 1.53 ± 0.01
Age at menarche (years) 13.16 ± 0.16 14.22 ± 0.25*
Hemoglobin at second trimester gr% 10.53 ± 0.27 (32) 13.42 ± 0.64 (6)*
Hemoglobin at third trimester gr% 10.87 ± 0.14 (80) 13.36 ± 0.42 (14)*
Gestational age (Usher) weeks 40.17 ± 0.03 39.51 ± 0.16*
  1. Number of subjects is between parentheses. *P < 0.01 with respect to values in Lima (150 m)