Fig. 3

Receiver operating characteristic curves comparing the discriminative ability of the No-Apnea, NoSAS, and STOP-Bang tools for diagnosis of obstructive sleep apnea at RDI ≥ 5, RDI ≥ 15, and RDI ≥ 30. NoSAS, neck, obesity, snoring, age, sex; ROC, receiver operating characteristic; STOP-Bang, snoring, tiredness, observed apnea, blood pressure, body mass index, age, neck circumference, and gender.