Table 3.

Changes in primary outcome (PSQI) in the 3 groups.

Assigned group (week 4)	Estimation (SE; 95% CI)	P value
ICBTa	−2.19 (0.29; −2.76 to −1.63)	<.001
TGTb	−1.79 (0.26; −2.31 to –1.27)	<.001
WLCc	−0.64 (0.25; −1.14 to −0.14)	.01

^aICBT: internet-based cognitive behavioral therapy.

^bTGT: Three Good Things.

^cWLC: waiting list control.