Symptoms and signs of acute mountain sickness in non-smokers at 4525 masl
| LLS symptom intensity | n (%) | ||||
| 0 | 1 | 2 | 3 | Total | |
| Headache | 46 (23) | 70 (35) | 56 (28) | 28 (14) | 154 (77) |
| Dizziness or light-headedness | 158 (79) | 22 (11) | 12 (6) | 8 (4) | 42 (21) |
| Weakness or fatigue | 87 (43) | 68 (34) | 42 (21) | 3 (2) | 113 (57) |
| Anorexia, nausea or vomiting | 102 (51) | 52 (26) | 36 (18) | 10 (5) | 98 (49) |
| Difficulty sleeping | 58 (29) | 72 (36) | 58 (29) | 12 (6) | 142 (71) |
| Reduction in activity | 112 (56) | 71 (36) | 17 (9) | 0 | 88 (44) |
| Change in mental status | 196 (98) | 3 (1.5) | 1 (0.5) | 0 | 4 (2) |
| Ataxia | 194 (97) | 6 (3) | 0 | 0 | 6 (3) |
| Peripheral oedema | 172 (86) | 21 (11) | 7 (3) | 0 | 28 (14) |
Comparison between control group and smoking group for headache, χ2=4.66, p=0.031; for anorexia, nausea or vomiting, χ2=3.85, p=0.049; for difficulty sleeping χ2=13.517, p<0.001; for all other symptoms differences were non-significant. Total: the sum of scores >1.