Table 2:

Unadjusted comparisons of self-reported sleep characteristics for incident caregivers and non-caregiving controls.

Variable M (SD)	Caregivers	Controls	p-value
Total sleep time (hours)	7.51 (1.41)	7.44 (1.43)	0.617
Time in bed (hours)	8.21 (1.34)	7.99 (1.41)	0.081
Sleep onset latency (hours)	0.37 (0.41)	0.29 (0.31)	0.031
Wake after sleep onset (hours)	0.36 (0.60)	0.33 (0.53)	0.549
Sleep efficiency (Total sleep time / Time in bed)	1.42 (0.23)	1.45 (0.20)	0.228

M = mean; SD = standard deviation