Table 4

Details of receiver operating characteristic curves for PM-AHI₁, PM-AHI₂, PM-AHI₃ and PM-AHI₄ according to polysomnographic AHI thresholds of ≥5/h, ≥15/h and ≥30/h for (1) all the subjects and (2) ‘high-risk’ subjects

	AHI ≥5/h		AHI ≥15/h		AHI ≥30/h
	AUC	95% CI	AUC	95% CI	AUC	95% CI
All subjects
PM-AHI₁	0.986	0.966 to 0.996	0.987	0.968 to 0.997	0.991	0.973 to 0.998
PM-AHI₂	0.971	0.946 to 0.987	0.979	0.957 to 0.992	0.984	0.963 to 0.995
PM-AHI₃	0.981	0.959 to 0.993	0.981	0.958 to 0.993	0.983	0.962 to 0.994
PM-AHI₄	0.947	0.916 to 0.969	0.968	0.941 to 0.984	0.979	0.957 to 0.992
High-risk subjects
PM-AHI₁	0.996	0.961 to 1.000	0.988	0.947 to 0.999	0.994	0.957 to 1.000
PM-AHI₂	0.984	0.940 to 0.998	0.984	0.940 to 0.998	0.984	0.941 to 0.998
PM-AHI₃	0.998	0.965 to 1.000	0.985	0.943 to 0.999	0.985	0.942 to 0.999
PM-AHI₄	0.957	0.903 to 0.986	0.972	0.924 to 0.994	0.981	0.936 to 0.997

AHI, apnoea–hypopnoea index; AUC, area under the curve; ‘high-risk’ subjects, subjects with an Epworth Sleepiness Scale score of >10 and/or a STOP-BANG score of ≥3/8; PM-AHI, portable monitor apnoea–hypopnoea index.