Table 3.

Primary and secondary outcomes by treatment groups with intention-to-treat analysis

	SMILE (n = 23)			Waitlist (n = 12)
	Pre-test	Post-test	Cohen’s d T0-T1	Pre-test	Post-test	Cohen’s d T0-T1	Time		Group x Time
Primary outcome	Mean (SD)	Mean (SD)	Pre-Post	Mean (SD)	Mean (SD)	Pre-Post	F	p	F	p	η2
Insomnia Severity (ISI)	14.3 (3.1)	10.7 (4.8)	0.89	15.7 (5.4)	14.7 (4.9)	0.20	18.46	<0.001	5.91	0.02*	0.15
Secondary outcomes
Anxiety symptoms (HADS-A)	8.9 (3.3)	8.2 (3.6)	0.20	8.8 (4.7)	9.3 (4.0)	0.11	0.17	0.68	2.21	0.15	0.06
Depressive symptoms (BDI II)	11.9 (7.1)	11.0 (8.2)	0.11	11.5 (6.0)	12.8 (5.1)	0.23	0.08	0.78	1.82	0.19	0.05
Quality of life (Q-LES-Q)	54.7 (12.8)	56.1 (17.6)	0.09	61.2 (10.2)	54.0 (15.8)	0.54	0.99	0.33	2.29	0.14	0.07
Pre-Sleep Arousal (PSAS)	42.5 (9.0)	35.7 (10.1)	0.71	43.5 (10.0)	43.1 (10.5)	0.04	3.76	0.06	3.76	0.06	0.09
Dysfunctional Beliefs and Attitudes about Sleep (DBAS)	81.8 (19.8)	67.9 (13.6)	0.82	78.4 (20.8)	79.8 (19.1)	0.07	4.05	0.05	6.20	0.02*	0.17

* p < 0.05