Table 2.

Sleep architecture of the two naps of Nap arm showing minutes in each sleep stage.

	Nap 1			Nap 2
	Mean	SD	N	Mean	SD	N
All Participants
TST (min)	68.91	37.67	17	68.82	39.76	17
N1 (min)	8.59	8.64	17	8.15	6.67	17
N2 (min)	40.82	21.13	17	39.56	21.57	17
N3 (min)	13.79	14.72	17	17.18	16.79	17
REM (min)	5.00	8.65	17	3.94	7.04	17
Those who achieved sleep states*
TST (min)	73.22	34.32	16	68.82	39.76	17
Sleep onset latency (min)	20.28	22.39	16	16.41	22.87	17
N1 (min)	9.13	8.62	16	8.15	6.67	17
N2 (min)	43.38	18.92	16	39.56	21.57	17
N3 (min)	19.54	13.88	12	24.33	14.84	12
REM (min)	17.00	6.63	5	11.17	7.87	6
REM latency (min)	68.40	11.67	5	79.67	11.31	6

^*Mean, SD and N for only those individuals who achieved each sleep stage. Neither total sleep time nor sleep onset latency differed between naps (p=0.99 and p=0.56 respectively).