Table 3.

Sleep Characteristics.

Sleep parameter	Non-TBI (n = 14)	TBI (n = 16)	p-value
TST (min)	339.8 ± 61.5	365.8 ± 51.2	.21
Sleep efficiency (%)	90.2 ± 2.2	88.2 ± 6.2	.25
WASO (min)	26.9 ± 13.1	27.7 ± 15.2	.87
Sleep latency (min)	10.4 ± 6.2	18.9 ± 17.0	.08
REM latency (min)	107.6 ± 33.8	141.6 ± 43.2	.02*
N1 (%)	2.4 ± 1.7	2.3 ± 1.9	.89
N2 (%)	54.2 ± 6.9	56.8 ± 7.6	.33
SWS (%)	28.1 ± 7.4	30.1 ± 6.2	.43
REM (%)	15.4 ± 3.7	10.8 ± 5.03	.01*

N1 = non-REM stage 1; N2 = non-REM stage 2; REM = rapid eye movement sleep; SWS = slow wave sleep; TBI = traumatic brain injury; TST = total sleep time; WASO = wake after sleep onset.

*p-value < .05.