Table II.
Odds Ratio of living at high altitude associated as risk factor for getting cancer (95% CI). High altitude as exposure factor.
| A | Prevalence Comparison | Mortality comparison | ||||
|---|---|---|---|---|---|---|
| Cancer type | OR/(L-H) | 95% CI | P | OR/(L-H) | 95% CI | P |
| Gastric | 1.1 | 1.08; 1.15 | <0.01* | 1.2 | 1.19; 1.27 | <0.01* |
| Colorectal | 1.6 | 1.52; 1.68 | <0.01* | 1.4 | 1.35; 1.49 | <0.01* |
| Hepatic/bile duct | 1.2 | 1.13; 1.28 | <0.01* | 1.2 | 1.13; 1.24 | <0.01* |
| Breast cancer | 1.1 | 1.03; 1.18 | <0.01* | 1.1 | 1.01; 1.13 | 0.03* |
| Uterine cervix | 1.1 | 1.06; 1.13 | <0.01* | 1.0 | 0.94; 1.06 | 0.04* |
| Lymphatic/hematopoietic | 1.7 | 1.57; 1.75 | <0.01* | 1.1 | 1.06; 1.22 | <0.01* |
| Average | 1.3 | 1.23; 1.34 | <0.01* | 1.2 | 1.11; 1.24 | <0.01* |
| B | Prevalence Comparison | Mortality comparison | ||||
| Gastric | 0.9 | 0.83; 0.93 | <0.01* | 1.2 | 1.16; 1.23 | <0.01* |
| Colorectal | 1.2 | 1.18; 1.26 | <0.01* | 1.6 | 1.49; 1.66 | <0.01* |
| Hepatic/bile duct | 1.0 | 0.89; 1.02 | 0.1 | 1.2 | 1.12; 1.24 | <0.01* |
| Breast cancer | 0.6 | 0.52; 0.67 | <0.01* | 1.1 | 1.03; 1.16 | <0.01* |
| Uterine cervix | 0.6 | 0.58; 0.65 | <0.01* | 1.1 | 0.99; 1.12 | 0.09 |
| Lymphatic/hematopoietic | 1.5 | 1.43; 1.63 | <0.01* | 1.2 | 1.08; 1.26 | <0.01* |
| Average | 1.0 | 0.93; 1.02 | 0.2 | 1.1 | 1.10; 1.26 | <0.01* |
| C | Prevalence Comparison | Mortality comparison | ||||
| Gastric | 1.6 | 1.58; 1.71 | <0.01* | 1.5 | 1.43; 1.53 | <0.01* |
| Colorectal | 2.3 | 2.19; 2.33 | <0.01* | 0.8 | 0.77: 0.89 | <0.01* |
| Hepatic/bile duct | 1.7 | 1.59; 1.83 | <0.01* | 1.2 | 1.53: 1.29 | <0.01* |
| Breast cancer | 1.9 | 1.84; 1.93 | <0.01* | 0.9 | 0.79; 0.93 | <0.01* |
| Uterine cervix | 2.1 | 1.98; 2.14 | <0.01* | 1.0 | 0.89; 1.04 | 0.36 |
| Lymphatic/hematopoietic | 1.9 | 1.78; 2.06 | <0.01* | 1.2 | 1.08; 1.26 | <0.01* |
| Average | 1.9 | 1.83; 2.01 | <0.01* | 1.2 | 1.07; 1.24 | <0.01* |
Note. This table presents the Odds Ratio of living at high altitude associated as risk factor for getting cancer through the comparison of prevalence and mortality rates due to cancer obtained for groups according to geographic altitude; L-H: Highland Region tendency is located to the right side of 1; P: p-value; A: Highlands vs Low-lying Regions; B: Northern Highlands vs Low-lying Regions; C: Southern Highlands vs Low-lying Regions; CI: Confidence interval; MD: Mean difference;
*
Significant value.
Living at high altitude is considered the exposure factor.