Skip to main content

Table 3 Acute mountain sickness among young men who entered the Tibetan-Qinghai plateau: prevalence and univariate logistic regression analysis (odd years, n = 1769)

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 characteristic       
   Age -- -- -0.01 0.99 0.92-1.07 0.781
   Ethnicity       
Han (Chinese) (ref.) 1654 545(24.6)   1.00   
Tibetan 44 1(1.2) -3.05 0.05 0.01-0.34 0.003
Hui (Muslim) 71 20(19.6) -0.23 0.80 0.47-1.35 0.401
   Birth province       
Northwest province (ref.) 726 228(22.9)   1.00   
Southwest province 595 176(21.0) -0.09 0.92 0.72-1.16 0.474
East province 448 162(28.3) 0.21 1.24 0.97-1.59 0.093
   Education       
≤Junior high school (ref.) 981 310(23.1)   1.00   
= High school 746 244(24.3) 0.05 1.05 0.86-1.29 0.625
≥College 42 12(20.0) -0.14 0.87 0.44-1.71 0.679
   BMI       
Normal 1375 449(32.7)     
Underweight 215 60(27.9) -0.23 0.80 0.58-1.10 0.166
Overweight 179 57(31.8) -0.04 0.96 0.69-1.35 0.828
   Rank       
Private (ref.) 1507 487(23.9)   1.00   
NCO 204 59(20.3) -0.16 0.85 0.62-1.18 0.329
Officer 58 20(26.3) 0.10 1.10 0.63-1.91 0.729
Health behavior       
   Alcohol drinking       
Yes (ref.) 538 174(23.9)   1.00   
No 1231 392(23.4) -0.02 0.98 0.79-1.21 0.836
   Cigarette smoking       
Yes (ref.) 1052 354(25.4)   1.00   
No 717 212(21.0) -0.19 0.83 0.67-1.02 0.071
   Prophylaxis       
No (ref.) 998 341(26.0)   1.00   
Yes 771 225(20.6) -0.23 0.79 0.65-0.97 0.026
Travel profile       
   Start point altitude       
1300-1500 m (ref.) 606 166(18.9)   1.00   
900-1100 m 511 163(23.4) 0.22 1.24 0.96-1.61 0.100
600-800 m 652 237(28.6) 0.41 1.51 1.19-1.92 0.001
   Destination altitude       
2900-3100 m (ref.) 558 91(19.5)   1.00   
3600-3700 m 587 202(26.2) 0.99 2.69 2.03-3.57 < 0.001
4100-4300 m 624 273(38.9) 1.38 3.99 3.03-5.25 < 0.001
   Deployment type       
Normal by land (ref.) 797 118(15.4)   1.00   
Emergency by land 566 216(30.9) 0.69 2.00 1.58-2.53 < 0.001
Normal by air 240 90(30.0) 0.66 1.94 1.43-2.65 < 0.001
Emergency by air 166 72(38.3) 0.91 2.48 1.75-3.51 < 0.001
   Travel season       
Warm (ref.) 998 301(21.6)   1.00   
Cold 771 265(26.2) 0.19 1.21 0.99-1.48 0.060