Binary logistic regression for incidence of pneumonia
| Pneumonia (n=313) | Non-pneumonia (n=401) | OR (95% CI) | P value* | |
| Age | ||||
| 15–29 | 3 | 48 | 1 (reference) | NA |
| 30–39 | 18 | 117 | NA | NA |
| 40–49 | 23 | 74 | 4.79 (1.35 to 16.99) | 0.015 |
| 50–59 | 38 | 60 | 8.81 (2.52 to 30.85) | 0.001 |
| 60–69 | 71 | 48 | 21.11 (6.07 to 73.49) | < 0.001 |
| 70–79 | 76 | 38 | 24.68 (7.01 to 86.89) | < 0.001 |
| >80 | 84 | 16 | 47.30 (12.44 to 179.90) | < 0.001 |
| Sex | ||||
| Female | 133 | 240 | 1 (reference) | NA |
| Male | 180 | 161 | 1.66 (1.14 to 2.41) | 0.008 |
| BDRSs | ||||
| None | 254 | 349 | 1 (reference) | NA |
| Lung cancer | 10 | 18 | 0.38 (0.16 to 0.89) | 0.026 |
| COPD | 28 | 12 | NA | NA |
| Cancer and COPD | 1 | 4 | NA | NA |
| Others | 20 | 18 | NA | NA |
| BDCSs | ||||
| None | 238 | 385 | 1 (reference) | NA |
| Yes | 75 | 16 | 2.01 (1.04 to 3.87) | 0.037 |
| Diabetes | ||||
| None | 248 | 376 | 1 (reference) | NA |
| Yes | 65 | 25 | NA | NA |
| Hypertension | ||||
| None | 200 | 363 | 1 (reference) | NA |
| Yes | 113 | 38 | NA | NA |
| Other basic disease | ||||
| None | 288 | 384 | 1 (reference) | NA |
| Tumour | 15 | 7 | NA | NA |
| Kidney | 12 | 1 | 10.95 (1.19 to 101.14) | 0.035 |
| Others | 18 | 9 | NA | NA |
*Only the variable with a significant difference (p<0.05) is listed; NA: p>0.05.
BDCSs, basic disease of the cardiovascular system; BDRSs, basic disease of the respiratory system; COPD, chronic obstructive pulmonary disease.