Table 2.

Meta-regression of variables on the following actigraphically measures sleep parameters: (1) Total sleep time; (2) wake after sleep onset; (3) sleep onset latency; and (4) sleep efficiency.

	Total sleep time		Wake after sleep onset		Sleep onset latency		Sleep efficiency
Variable	β (95% confidence intervals)	P	β (95% confidence intervals)	P	β (95% confidence intervals)	P	β (95% confidence intervals)	P
Mean age	−0.08 (−0.54–0.37)	0.636	0.009 (−0.03–0.05)	0.448	0.02 (−0.2–0.6)	0.165	−0.39 (−0.23–0.14)	0.468
Number of nights of sleep monitoring	0.11 (−0.29–0.52)	0.482	0.01 (−0.66–0.68)	0.979	0.11 (−1.10–1.33)	0.734	−0.23 (−0.93–0.48)	0.302
Presence of control group psychiatric comorbidities	−0.29 (−1.45–0.86)	0.391	−0.29 (−1.46–0.84)	0.380	−0.66 (−1.82–0.50)	0.134	−0.13 (−2.99–3.25)	0.875
Sample drawn from military population	0.82 (−1.08–1.25)	0.854	0.15 (−0.94–1.25)	0.606	0.38 (−1.47–2.24)	0.471	−0.69 (−3.37–1.98)	0.382

Presence of control group psychiatric comorbidities coded as 0 = absent; 1 = present. Sample drawn from military population coded 0 = not from a military population; 1 = from a military population.