Table 4. Multiple logistic regression analysis of the relationship between chronic mountain sickness and significant immigrant community factors (model including all variables).
| Variable | OR | 95% CI | P |
| Residential altitude (km)a | 3.970 | (3.107, 5.074) | <0.001 |
| Medicine expenditureb | 0.897 | (0.817, 0.985) | 0.022 |
| Oxygen-generating system | |||
| Unavailable (ref.) | 1 | ||
| Available | 0.827 | (0.704, 0.970) | 0.020 |
| Community type | |||
| Rural (ref.) | 1 | ||
| Urban | 1.228 | (1.034, 1.460) | 0.019 |
| Occupation | |||
| Logistics (ref.) | 1 | ||
| Guard | 1.104 | (0.910, 1.340) | 0.316 |
| Construction | 1.240 | (1.022, 1.504) | 0.029 |
OR, odds ratio; CI, confidence interval. aControl factor; bstandardized odds score.