Table 1.
Maternal and infant characteristics.
| Tibetan | Chinese Han | P-values | |||
|---|---|---|---|---|---|
| 3780 m | 2200 m | 2200 m | Altitude | Nationality | |
| Maternal characteristics | |||||
| n | 9 | 7 | 5 | ||
| Age (years) | 28.2 ± 2.4 | 26.6 ± 1.8 | 28.6 ± 2.1 | NS | NS |
| Parity | 3.3 ± 0.7 | 1.7 ± 0.3 | 1.8 ± 0.4 | NS | NS |
| Height (cm) | 161 ± 2 | 167 ± 1 | 165 ± 2 | <0.05 | NS |
| Non-pregnant weight (kg) | 55 ± 3 | 54 ± 2 | 61 ± 4 | NS | NS |
| Non-pregnant body mass index (kg m−2) | 34 ± 2 | 33 ± 1 | 37 ± 3 | NS | NS |
| Weight gain with pregnancy (kg) | 13 ± 1 | 13 ± 2 | 14 ± 2 | NS | NS |
| Systolic BP (mmHg) | 111 ± 2 | 108 ± 2 | 103 ± 5 | NS | NS |
| Diastolic BP (mmHg) | 72 ± 2 | 66 ± 2 | 66 ± 3 | NS | NS |
| Infant characteristics | |||||
| Birth weight (g) | 3318 ± 125 | 3253 ± 150 | 3423 ± 186 | NS | NS |
| Birth/Placental weight ratio | 5.5 ± 0.2 | 5.6 ± 0.3 | 5.7 ± 0.4 | NS | NS |
| Apgar score | 8.778 ± 0.443 | 8.857 ± 0.35 | 8.8 ± 0.4 | NS | NS |
All values are either numbers or means ± standard errors of the mean. BP, blood pressure.