Table 5 Independent and combined likelihood ratios for predictors of suspected or diagnosed tuberculosis: logistic regression models
Reference standard | Predictors | Positive likelihood ratio | (95% CI) | Negative likelihood ratio | (95% CI) |
|---|---|---|---|---|---|
Tuberculosis suspected by respiratory physician* | |||||
Previous tuberculosis | 2.6 | (1.9–3.5) | 0.75 | (0.67–0.84) | |
Haemoptysis | 4.8 | (2.2–10.3) | 0.91 | (0.86–0.96) | |
Night sweating | 2.8 | (1.8–4.2) | 0.77 | (0.68–0.87) | |
Weight loss | 3.5 | (2.3–5.6) | 0.75 | (0.66–0.84) | |
Pleuritic pain | 2.5 | (1.5–4.1) | 0.90 | (0.84–0.95) | |
No difficulty breathing | 1.6 | (1.2–2.1) | 0.88 | (0.80–0.96) | |
No wheeze | 1.2 | (1.1–1.4) | 0.70 | (0.53–0.92) | |
All 7 predictors | 594 | (232–1821) | 0.22 | (0.17–0.29) | |
Tuberculosis diagnosed by primary care physician** | |||||
Weight loss | 2.9 | (1.3–5.8) | 0.81 | (0.67–0.96) | |
Night sweats | 2.0 | (1.0–4.6) | 0.76 | (0.54–0.97) | |
Pleuritic pain | 2.9 | (1.0–4.8) | 0.82 | (0.63–1.00) | |
All 3 predictors | 16.7 | (5.9–29.4) | 0.50 | (0.36–0.65) |