Table 3: STOP-Bang Diagnostic Accuracy for Detecting Moderate to Severe Obstructive Sleep Apnoea (Apnoea–Hypopnoea Index >15) and Severe Obstructive Sleep Apnoea (Apnoea–Hypopnoea Index >30).

Moderate to Severe OSA (AHI >15)	Severe OSA (AHI >30)
Sensitivity: 92.9% (95% CI [84.1–97.6])	Sensitivity: 100% (95% CI [91.0–100.0])
Specificity: 43.0% (95% CI [33.5–52.9])	Specificity: 37.0% (95% CI [28.90–45.6])
PPV: 51.6% (95% CI [42.5–60.6])	PPV: 31.0% (95% CI [23.0–39.8])
NPV: 90.2% (95% CI [78.6–96.7])	NPV: 100% (95% CI [93.0–100.0])

AHI = apnoea–hypopnoea index; NPV = negative predictive value; OSA = obstructive sleep apnoea; PPV = positive predictive value. Source: Chung et al. 2008.[16] Adapted with permission from Wolters-Kluwer.