Table 3.

Estimated difference in change between groups. All models control for the baseline value of the outcome and history of suicide attempt (“yes” or “no”). Dependent variables were calculated as the later time point minus baseline, and the difference in change was estimated as Sleep Healthy Using the Internet minus Insomnia Education Website. The italicized text indicates statistical significance based on the Holm sequential procedure, considering all 9 outcomes.

Models	Change time 1 to time 2a,b				Change time 1 to time 3c				Change time 1 to time 4d,e
	Estimated difference between groups, SE	Generalized η2	P value	Estimated difference between groups, SE		Generalized η2	P value	Estimated difference between groups, SE		Generalized η2	P value
ISIf	–3.47 (0.66)	0.13	<.0001	–3.80 (0.78)		0.12	<.0001	–3.42 (0.78)		0.10	<.0001
PCSg	2.07 (0.96)	0.02	.03	3.22 (1.08)		0.04	.004	1.81 (1.22)		0.01	.14
MCSh	2.58 (1.35)	0.02	.06	4.33 (1.63)		0.04	.009	4.53 (1.59)		0.04	.005

^an=98, Insomnia Education Website (for ISI); n=91, Sleep Healthy Using the Internet (for ISI).

^bn=97, Insomnia Education Website (for PCS and MCS); n=91, Sleep Healthy Using the Internet (for PCS and MCS).

^cn=88, Insomnia Education Website (for all outcomes); n=77, Sleep Healthy Using the internet (for all outcomes).

^dn=87, Insomnia Education Website (for ISI); n=79, Sleep Healthy Using the Internet (for ISI).

^en=87, Insomnia Education Website (for PCS and MCS); n=78, Sleep Healthy Using the Internet (for PCS and MCS).

^fISI: Insomnia Severity Index.

^gPCS=Physical Component Summary of the Veterans RAND 36-item Health Survey.

^hMCS=Mental Component Summary of the Veterans RAND 36-item Health Survey.