Table 4 Acute mountain sickness among young men who entered the Tibetan-Qinghai plateau: prevalence and univariate logistic regression analysis (even years, n = 1958)
From: Population level determinants of acute mountain sickness among young men: a retrospective study
Indicators | Total number of young men | Number of diagnosed AMS cases(%) | β | OR | 95%CI | p-value |
|---|---|---|---|---|---|---|
Demographic characteristics | Â | Â | Â | Â | Â | Â |
   Age | -- | -- | 0.05 | 1.05 | 0.98-1.13 | 0.148 |
   Ethnicity |  |  |  |  |  |  |
Han (Chinese) (ref.) | 1818 | 596(24.4) | Â | 1.00 | Â | Â |
Tibetan | 43 | 2(2.4) | -2.30 | 0.10 | 0.02-0.41 | 0.002 |
Hui (Muslim) | 97 | 32(24.6) | 0.01 | 1.01 | 0.65-1.56 | 0.966 |
   Birth province |  |  |  |  |  |  |
Northwest province (ref.) | 818 | 224(21.3) | Â | 1.00 | Â | Â |
Southwest province | 671 | 214(23.4) | 0.10 | 1.10 | 0.88-1.37 | 0.391 |
East province | 469 | 172(29.0) | 0.31 | 1.36 | 1.07-1.73 | 0.012 |
   Education |  |  |  |  |  |  |
≤Junior high school (ref.) | 1079 | 351(24.1) |  | 1.00 |  |  |
= High school | 843 | 270(23.6) | -0.02 | 0.98 | 0.81-1.19 | 0.815 |
≥College | 36 | 9(16.7) | -0.37 | 0.69 | 0.32-1.49 | 0.344 |
   BMI |  |  |  |  |  |  |
Normal | 1500 | 480(32.0) | Â | Â | Â | Â |
Underweight | 234 | 65(27.8) | -0.20 | 0.82 | 0.60-1.11 | 0.196 |
Overweight | 224 | 85(37.9) | 0.26 | 1.30 | 0.97-1.74 | 0.078 |
   Rank |  |  |  |  |  |  |
Private (ref.) | 1666 | 533(23.5) | Â | 1.00 | Â | Â |
NCO | 229 | 70(22.0) | -0.07 | 0.94 | 0.69-1.26 | 0.664 |
Officer | 63 | 27(37.5) | 0.47 | 1.59 | 0.96-2.65 | 0.073 |
Health behavior | Â | Â | Â | Â | Â | Â |
   Alcohol drinking |  |  |  |  |  |  |
Yes (ref.) | 617 | 194(22.9) | Â | 1.00 | Â | Â |
No | 1341 | 436(24.1) | 0.05 | 1.05 | 0.86-1.29 | 0.638 |
   Cigarette smoking |  |  |  |  |  |  |
Yes (ref.) | 1190 | 392(24.6) | Â | 1.00 | Â | Â |
No | 768 | 238(22.5) | -0.09 | 0.91 | 0.75-1.11 | 0.367 |
   Prophylaxis |  |  |  |  |  |  |
No (ref.) | 1362 | 463(25.8) | Â | 1.00 | Â | Â |
Yes | 596 | 167(19.5) | -0.28 | 0.76 | 0.61-0.93 | 0.009 |
Travel profile | Â | Â | Â | Â | Â | Â |
   Start point altitude |  |  |  |  |  |  |
1300-1500 m (ref.) | 843 | 250(21.1) | Â | 1.00 | Â | Â |
900-1100 m | 563 | 188(25.1) | 0.17 | 1.19 | 0.95-1.50 | 0.138 |
600-800 m | 552 | 192(26.7) | 0.24 | 1.27 | 1.01-1.59 | 0.044 |
   Destination altitude |  |  |  |  |  |  |
2900-3100 m (ref.) | 687 | 119(10.5) | Â | 1.00 | Â | Â |
3600-3700 m | 634 | 232(28.9) | 1.01 | 2.75 | 2.13-3.56 | < 0.001 |
4100-4300 m | 637 | 279(39.0) | 1.31 | 3.72 | 2.89-4.79 | < 0.001 |
   Deployment type |  |  |  |  |  |  |
Normal by land (ref.) | 885 | 203(14.9) | Â | 1.00 | Â | Â |
Emergency by land | 587 | 221(30.2) | 0.71 | 2.03 | 1.61-2.55 | < 0.001 |
Normal by air | 268 | 105(32.2) | 0.77 | 2.16 | 1.62-2.90 | < 0.001 |
Emergency by air | 218 | 218(43.2) | 1.06 | 2.90 | 2.13-3.95 | < 0.001 |
   Travel season |  |  |  |  |  |  |
Warm (ref.) | 1135 | 346(21.9) | Â | 1.00 | Â | Â |
Cold | 823 | 284(26.3) | 0.18 | 1.20 | 0.99-1.45 | 0.060 |