Table 1 Baseline characteristics, exercise testing results, and measures upon arriving at 4100 m
Index | Total (n = 99) | AMS (n = 47) | Non-AMS (n = 52) | P-value |
|---|---|---|---|---|
Baseline characteristics | ||||
 Age (year, x ± s) | 26.9 ± 8.3 | 26.0 ± 7.7 | 27.6 ± 8.8 | 0.358 |
 Men [n(%)] | 67 (67.7) | 23 (48.9) | 44 (84.6) | < 0.001 |
 Women [n(%)] | 32 (32.3) | 24 (51.1) | 8 (15.4) | < 0.001 |
 Height (cm, x ± s) | 170.0 ± 6.1 | 168.4 ± 5.9 | 171.3 ± 6.1 | 0.019 |
 Weight (kg, x ± s) | 64.5 ± 9.5 | 62.0 ± 10.0 | 66.7 ± 8.6 | 0.014 |
 BMI (kg/m2, x ± s) | 22.3 ± 2.5 | 21.8 ± 2.7 | 22.7 ± 2.2 | 0.070 |
 Smoker [n(%)] | 38 (38.4) | 11 (23.4) | 27 (51.9) | 0.004 |
 HR at rest (beats/min, x ± s) | 73.2 ± 11.2 | 74.5 ± 10.9 | 71.9 ± 11.5 | 0.257 |
 SpO2 at rest (%, x ± s) | 97.1 ± 1.3 | 97.5 ± 1.2 | 96.8 ± 1.4 | 0.017 |
 SBP at rest (mmHg, x ± s) | 117.3 ± 12.1 | 117.2 ± 12.6 | 117.4 ± 11.8 | 0.937 |
 DBP at rest (mmHg, x ± s) | 73.5 ± 11.4 | 73.8 ± 12.3 | 73.4 ± 10.6 | 0.858 |
After exercise testing | ||||
 SpO2 after exercise (%, x ± s) | 97.1 ± 1.2 | 96.9 ± 1.3 | 97.2 ± 1.1 | 0.130 |
 ΔeSpO2 (%, x ± s) | −0.1 ± 1.8 | −0.6 ± 1.7 | 0.4 ± 1.7 | 0.004 |
After arriving at 4100 m | ||||
 SBP at HA (mmHg, x ± s) | 122.3 ± 14.8 | 118.2 ± 11.8 | 126.0 ± 16.3 | 0.008 |
 ΔhSBP (mmHg, x ± s) | 5.0 ± 15.4 | 1.0 ± 15.0 | 8.7 ± 15.0 | 0.013 |