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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Exp Physiol. 2014 Aug 28;99(12):1624–1635. doi: 10.1113/expphysiol.2014.080820

Table 2.

Hemoglobin concentration, percent oxygen saturation, blood gas variables (PaO2, PaCO2, and pH), and standard and in vivo P50 during peak exercise at 4200m in Tibetan and Han Chinese males. Hemoglobin concentration is significantly different in Tibetan and Han Chinese subjects (p < 0.05).

Group Ethnicity [Hb] (g/dl) Arterial PO2 (mmHg) Arterial PCO2 (mmHg) Arterial pH % SaO2 Standard P50 (mmHg) In vivo P50 (mmHg)
All subjects: Mean, Standard deviation 18.2 ±2.1 45.7 ±4.6 26.0 ±2.6 7.31 ±0.05 82.0 ±5.0 24.5 ±1.6 26.0 ±2.1
Tibetan: Mean, Standard deviation 17.7 ±2.1 46.3 ±4.9 26.0 ±2.9 7.31 ±0.06 82.3 ±5.2 24.5 ±1.4 26.0 ±2.0
Han Chinese: Mean, Standard deviation 19.6 ±1.4 44.3 ±3.7 26.0 ±1.8 7.30 ±0.04 81.2 ±4.9 24.5 ±2.0 25.9 ±2.5