Table 4.

Polysomnographic measures during baseline sleep (B2) by vulnerability group

	Group	Mean	Std. Dev.	N
TST (min)a	Resilient	509.68	50.31	88
	Intermediate	512.11	59.08	87
	Vulnerable	517.55	57.67	88
SOL (min)b	Resilient	17.59	19.09	88
	Intermediate	22.21	23.63	87
	Vulnerable	16.34	14.81	88
NWAKc	Resilient	18.59	11.27	88
	Intermediate	17.09	11.18	87
	Vulnerable	18.08	12.47	88
% SWSd	Resilient	14.38	7.50	88
	Intermediate	14.56	7.12	87
	Vulnerable	13.70	7.58	88
% REMe	Resilient	24.67	3.82	88
	Intermediate	24.61	5.16	87
	Vulnerable	24.34	6.00	88
Stage shiftsf	Resilient	169.19	43.37	88
	Intermediate	170.55	44.94	87
	Vulnerable	172.70	51.45	88
REM latency (min)g	Resilient	69.75	31.32	88
	Intermediate	71.65	34.77	87
	Vulnerable	71.69	35.43	88
% stage 1h	Resilient	8.15	5.33	88
	Intermediate	8.35	5.09	87
	Vulnerable	8.69	4.64	88
% stage 2i	Resilient	52.62	7.88	88
	Intermediate	52.58	7.55	87
	Vulnerable	53.21	7.92	88

^aTotal sleep time in minutes.

^bSleep onset latency in minutes.

^cNumber of awakenings after sleep onset.

^dPercent of TST spent in slow-wave sleep.

^ePercent of TST spent in REM sleep.

^fNumber of stage shifts throughout the night.

^gREM SOL in minutes.

^hPercent of TST spent in stage 1 sleep.

ⁱPercent of TST spent in stage 2 sleep.