Table 4.

Mean value (standard deviation) and mean difference in Total Sleep Time, Sleep Efficiency and Apnea Hypopnea Index as scored by WatchPAT, RPSGT#1 and RPSGT#2.

	WP	RPSGT#1	RPSGT#2	WP- RPSGT#1	p	WP- RPSGT#2	p	RPSGT#2 - RPSGT#1	p
TST	376 (39)	351 (64)	348(62)	25 (61)	0.119	28(58)	0.075	−2.9(6.5)	0.097
SE	82.8(7.7)	76.5(14.7)	75.4(14.2)	5.3(14.6)	0.166	5.8(14.1)	0.124	−0.4(1.4)	0.243
AHI	9.6(11.9)	8.8(12.5)	8.4(13.3)	0.8(5.1)	0.536	1.2(5.3)	0.372	−0.4(1.3)	0.209

N = 16. TST = minutes total sleep time, SE = percentage sleep efficiency, AHI = number of apneas and hypopneas per hour of sleep. WP = WatchPAT, RPSGT#1 and RPSGT#2 = polysomnographies scored by registered polysomnography technician number one and two, respectively.