Univariate and multivariate analyses of factors to predict positive culture of Mycobacterium tuberculosis in patients undergoing endobronchial ultrasound-guided transbronchial needle aspiration
| Covariate | Unadjusted OR of positive culture | Univariate p value | Adjusted OR of positive culture (95% CI) | Multivariate p value |
| Age | 0.993 | 0.487 | ||
| African or Asian | 1.382 | 0.410 | ||
| Lymph node >20 mm | 0.457 | 0.019 | 0.905 (0.361 to 2.264) | 0.832 |
| Station 7 lymph node | 1.051 | 0.879 | ||
| HIV-positive | 1.281 | 0.631 | ||
| Abnormal lung parenchyma | 1.170 | 0.641 | ||
| Multiple lymph nodes sampled | 1.731 | 0.097 | 1.921 (0.965 to 3.823) | 0.063 |
| Number of needle passes | 1.276 | 0.079 | ||
| Pathology showing necrosis (grades I or III*) | 1.138 | 0.689 | 2.254 (0.870 to 5.839) | 0.094 |
| Lumph node >20 mm/necrosis interaction | 0.292 (0.075 to 1.128) | 0.074 |
* Grade I, epithelioid granulomatous reaction with caseation; grade III, granulomatous reaction with necrosis.