Sensitivities, specificities, PPV, NPV, LR+, LR− and overall accuracies of different cut-points of the STOP-BANG questionnaire for prediction of significant SDB as defined by: model A: AHI ≥5 events/h; model B: ≥15 events/h
| STOP-BANG cut-point (/8) | Proportion positive SB | Sensitivity | Specificity | PPV | NPV | LR+ | LR− | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|
| Model A | ||||||||
| ≥2 | 92/96 | 0.99 (0.92 to 1.00) | 0.12 (0.03 to 0.32) | 0.77 (0.67 to 0.85) | 0.75 (0.19 to 0.99) | 1.13 | 0.11 | 77 |
| ≥3 | 82/96 | 0.93 (0.84 to 0.98) | 0.38 (0.19 to 0.59) | 0.82 (0.72 to 0.89) | 0.64 (0.35 to 0.87) | 1.49 | 0.18 | 79 |
| ≥4 | 79/96 | 0.90 (0.81 to 0.96) | 0.42 (0.22 to 0.63) | 0.82 (0.72 to 0.90) | 0.59 (0.33 to 0.82) | 1.55 | 0.23 | 78 |
| ≥5 | 67/96 | 0.81 (0.70 to 0.89) | 0.62 (0.41 to 0.81) | 0.87 (0.76 to 0.94) | 0.52 (0.32 to 0.71) | 2.15 | 0.31 | 76 |
| ≥6 | 38/96 | 0.46 (0.34 to 0.58) | 0.79 (0.58 to 0.93) | 0.87 (0.72 to 0.96) | 0.33 (0.21 to 0.46) | 2.20 | 0.68 | 54 |
| ≥7 | 15/96 | 0.18 (0.10 to 0.29) | 0.92 (0.73 to 0.99) | 0.87 (0.60 to 0.98) | 0.27 (0.18 to 0.38) | 2.17 | 0.89 | 36 |
| 8 | 5/96 | 0.07 (0.02 to 0.15) | 1.00 (0.86 to 1.00) | 1.00 (0.48 to 1.00) | 0.26 (0.18 to 0.37) | – | 0.93 | 30 |
| Model B | ||||||||
| ≥2 | 92/96 | 1.00 (0.91 to 1.00) | 0.07 (0.02 to 0.18) | 0.45 (0.34 to 0.55) | 1.00 (0.40 to 1.00) | 1.08 | 0 | 47 |
| ≥3 | 82/96 | 1.00 (0.91 to 1.00) | 0.25 (0.15 to 0.39) | 0.50 (0.39 to 0.61) | 1.00 (0.77 to 1.00) | 1.34 | 0 | 57 |
| ≥4 | 79/96 | 1.00 (0.91 to 1.00) | 0.31 (0.19 to 0.45) | 0.52 (0.40 to 0.63) | 1.00 (0.80 to 1.00) | 1.45 | 0 | 60 |
| ≥5 | 67/96 | 0.93 (0.80 to 0.98) | 0.47 (0.34 to 0.61) | 0.57 (0.44 to 0.69) | 0.90 (0.73 to 0.98) | 1.76 | 0.15 | 67 |
| ≥6 | 38/96 | 0.63 (0.47 to 0.78) | 0.78 (0.65 to 0.88) | 0.68 (0.51 to 0.82) | 0.74 (0.61 to 0.85) | 2.91 | 0.47 | 72 |
| ≥7 | 15/96 | 0.22 (0.11 to 0.38) | 0.89 (0.78 to 0.96) | 0.60 (0.32 to 0.84) | 0.60 (0.49 to 0.71) | 2.01 | 0.88 | 60 |
| 8 | 5/96 | 0.10 (0.03 to 0.23) | 0.98 (0.90 to 1.00) | 0.80 (0.28 to 0.99) | 0.59 (0.48 to 0.70) | 5.36 | 0.92 | 60 |
Data presented with 95% CIs.
AHI, apnoea hypopnoea index; LR+, likelihood ratios positive; LR−, likelihood ratios negative; NPV, negative predictive values; PPV, positive predictive values; SDB, sleep disordered breathing.