Table 3. Comparison of AMS symptoms as reported in 1990 by Maggiorini et al. [6] and in the present study.
| 2850 m (Konkordia hut) |
3050 m (Finsteraarhorn hut) |
3650 m (Mönchsjoch hut) |
4559 m (Margherita hut) |
Comparison symptom prevalence* OR (95% CI) |
|||||
|---|---|---|---|---|---|---|---|---|---|
| 1990 (n = 47) |
2018 (n = 212) |
1990 (n = 128) |
2018 (n = 98) |
1990 (n = 82) |
2018 (n = 629) |
1990 (n = 209) |
2018 (n = 431) |
2018 versus 1990 (n = 1370 versus 466) |
|
| Headache | |||||||||
| • None (LLS 0) | 94% | 76% | 91% | 80% | 63% | 64% | 28% | 52% | 0.72 (0.57–0.92) |
| • Any (LLS ≥ 1) | 6% | 24% | 9% | 20% | 37% | 36% | 72% | 48% | |
| Gastrointestinal upset | |||||||||
| • None (LLS 0) | 94% | 94% | 92% | 94% | 78% | 95% | 54% | 88% |
0.23 (0.16–0.29) |
| • Any (LLS ≥ 1) | 6% | 6% | 8% | 6% | 22% | 5% | 46% | 12% | |
| Dizziness | |||||||||
| • No (LLS 0) | 100% | 92% | 99% | 97% | 92% | 71% | 87% | 73% |
3.08 (2.10–4.51) |
| • Any (LLS ≥ 1) | 0% | 8% | 1% | 3% | 8% | 29% | 13% | 27% | |
| Any symptoms | |||||||||
| • No (LLS 0) | 53% | 49% | 41% | 50% | 26% | 38% | 8% | 26% | 0.53 (0.41–0.69) |
| • Yes (LLS ≥ 1) | 47% | 51% | 59% | 50% | 74% | 62% | 92% | 74% | |
Comparable are entries concerning no symptoms. The remaining cumulation of any symptoms was derived as difference (set in italics). Prevalence of any symptoms were compared between the studies through logistic regression analyses, conditioning on huts as strata. Results are presented as odds ratio (OR) with 95% confidence intervals (95% CI).
*Comparison within huts as strata (conditional logistic regression)