Table 3.
Predictors of a normal CXR at initial presentation among patients with pulmonary tuberculosis
| Characteristic | Normal CXR n/N |
% | Crude OR | Adjusted OR | 95%CI | P value |
|---|---|---|---|---|---|---|
| Immune status | ||||||
| CD4 ≤ 150 | 52/323 | 16 | 7.82 | 5.32 | 3.07–9.23 | <0.001 |
| CD4 > 150 | 19/525 | 4 | 1.53 | 1.05 | 0.54–2.04 | 0.897 |
| HIV-negative | 26/1085 | 2 | Reference | Reference | ||
| AFB smear-negative | ||||||
| Yes | 53/202 | 26 | 12.96 | 10.36 | 6.41–16.74 | <0.001 |
| No | 47/1760 | 3 | Reference | Reference | ||
| History of tobacco use | ||||||
| Yes | 15/490 | 3 | 0.50 | 0.36 | 0.18–0.74 | 0.005 |
| No | 84/1412 | 6 | Reference | Reference | ||
| Sex | ||||||
| Male | 52/1126 | 5 | 0.74 | 1.02 | 0.61–1.70 | 0.934 |
| Female | 48/780 | 6 | Reference | Reference | ||
| Age (for every 10-year increase) | NA | NA | 1.2 | 0.91–1.56 | 0.194 | |
| Cough duration (for every 30-day increase) | NA | NA | 0.98 | 0.92–1.05 | 0.613 |
CXR = chest X-ray; OR = odds ratio; CI = confidence interval; HIV = human immunodeficiency virus; AFB = acid-fast bacilli; NA = not applicable.