Table 4. Relationship between the prevalence of pneumonia and patients' demographic characters, BMI, and smoking and alcohol abuse.
NA, not applicable; χ2, chi-squared
| Variable | Pneumonia | χ2 | P-value | |
| Present number (%) | Absent number (%) | |||
| Age | ||||
| 17-30 | 0 (0.0) | 8 (100) | 1.95 | 0.376 |
| 31-45 | 1 (2.6) | 38 (97.4) | ||
| Above 45 | 34 (7.5) | 419 (92.5) | ||
| Gender | ||||
| Female | 23 (11.5) | 177 (88.5) | 10.36 | 0.001 |
| Male | 12 (4) | 288 (96) | ||
| Nationality | ||||
| Non-Saudi | 22 (7.8) | 261 (92.2) | 0.6 | 0.439 |
| Saudi | 13 (6) | 204 (94) | ||
| Smoking | ||||
| Ex-smoker | 3 (6.1) | 46 (93.9) | 1.25 | 0.74 |
| NA | 3 (4.6) | 62 (95.4) | ||
| Never | 25 (7.9) | 290 (92.1) | ||
| Current smoker | 4 (5.6) | 67 (94.4) | ||
| Alcohol abuse | ||||
| Ex-abuser | 0 (0.0) | 3 (100) | 1.99 | 0.573 |
| NA | 11 (9.6) | 104 (90.4) | ||
| Never | 24 (6.4) | 353 (93.6) | ||
| Current abuser | 0 (0.0) | 5 (100) | ||