| Symptoms | Strong physical labor group at 3700 m (243 persons) | Light physical labor group at 4200 m (300 persons) | ||
| With symptoms (cases) | Incidence (%) | With symptoms (cases) | Incidence (%) | |
| Dizziness | 150 | 61.7 | 193 | 64.3 |
| Tiredness | 194 | 79.8 | 250 | 83.3 |
| Fatigue | 184 | 75.7 | 234 | 78.0 |
| Sleepiness | 174 | 71.6 | 254 | 81.7(1) |
| Cyanosis | 89 | 36.6 | 57 | 19.0(1) |
| Chest tightness | 122 | 50.2 | 117 | 39.0(1) |
| Constipation | 77 | 31.7 | 54 | 18.0(1) |
| Diarrhea | 84 | 34.6 | 79 | 26.3(1) |
| Abdominal pain | 95 | 39.1 | 66 | 22.0(1) |
| Abdominal distension | 65 | 26.8 | 129 | 43.0(1) |
| Cough | 101 | 41.6 | 85 | 28.3(1) |
| Sputum | 105 | 43.2 | 95 | 31.7(1) |
| Light-headedness | 130 | 53.5 | 128 | 42.7(1) |
| Lower extremity edema | 58 | 23.9 | 29 | 9.7(1) |
| Unresponsive | 112 | 46.1 | 105 | 35.0(1) |
| Slow pulse | 54 | 22.2 | 29 | 9.7(1) |
| Numbness | 84 | 34.6 | 72 | 24.0(1) |
| Facial swelling | 140 | 57.6 | 26 | 8.7(1) |
| Unstable blood pressure | 50 | 20.6 | 32 | 10.7(1) |
| Precordial pain | 74 | 30.5 | 62 | 20.7(1) |