Table 4.

Sensitivity and PPV of Z-PLUS for each sleep sub-group (Normal, Insomnia, Apnea, PLM/RLS, and SSRI/SNRI)

	Wake	Light Sleep	Deep Sleep	REM
Normal subgroup 41 subjects (kappa =0.72)
Sensitivity	0.92	0.83	0.77	0.74
PPV	0.82	0.85	0.83	0.76
Insomnia subgroup 35 subjects (kappa =0.74)
Sensitivity	0.90	0.84	0.72	0.76
PPV	0.91	0.85	0.82	0.69
Apnea subgroup 5 subjects (kappa =0.75)
Sensitivity	0.88	0.82	0.78	0.82
PPV	0.90	0.87	0.50	0.70
PLM/RLS subgroup 22 subjects (kappa =0.67)
Sensitivity	0.91	0.83	0.67	0.61
PPV	0.83	0.80	0.76	0.73
SSRI/SNRI subgroup 4 subjects (kappa =0.68)
Sensitivity	0.92	0.84	0.38	0.71
PPV	0.75	0.84	0.98	0.78

Abbreviations: PLM, periodic limb movement; RLS, restless leg syndrome; PPV, positive predictive value; SSRI, selective serotonin reuptake inhibitor; SNRI, serotonin–norepinephrine reuptake inhibitor.