Table 4.

Comparisons between participants with and without insomnia symptoms and preliminary evidence of efficacy of CBT-I based on actigraphy data

	No insomnia (N=9) Mean (SE)	Pre-CBT-I (N=8) Mean (SE)	Insomnia vs no insomnia t test and effect size (95% CI)	1-month follow-up (N=7)	Insomnia pretreatment vs post-treatment T test and effect size (95% CI)
Wake after sleep onset in minutes	59.47 (10.58)	117.78 (23.99)	t(15)=2.32, p=0.035; 1.07 (0.07 to 2.03)	61.84 (11.83)	t(6)=4.13, p=0.006; 1.46 (0.38 to 2.50)
Hours of sleep	6.59 (.24)	7.16 (.29)	t(15)=1.51, p=0.15; 0.70 (−0.25 to 1.62)	6.52 (0.31)	t(6)=5.79, p=0.001; 2.05 (0.70 to 3.35)
Sleep efficiency (%)	86.5% (2.45)	78.6% (3.55)	t(15)=−1.87, p=0.08; −0.86 (−1.81 to 0.10)	86.3% (2.24)	t(6)=−2.64, p=0.039; 0.93 (0.05 to 1.77)

Bolded values are significant though should be interpreted with caution given our small sample size.

CBT-I, cognitive–behavioural therapy for insomnia.