Table 4. Changes in Sleep Parameters From Time 1 to Time 3 Comparing Participants Who Fully Completed Treatment in Either Intervention vs Those Who Did Not Fully Complete Treatment.

Outcome	Treatment completion, mean (SD)a		P value
	Yes	No
Insomnia Severity Index	−10.39 (6.2)	−6.16 (6.0)	.002
Sleep onset latency, min	−20.56 (28.4)	−10.04 (36.7)	.10
Wake after sleep onset, min	−21.37 (33.8)	−3.54 (25.7)	.01
Total sleep time, h	0.56 (1.2)	0.28 (1.2)	.26
Time in bed, h	−0.60 (1.2)	0.02 (0.8)	.01
Sleep efficiency, %b	13.31 (12.1)	3.27 (9.5)	<.001
Pittsburgh Sleep Quality Index	−5.66 (4.1)	−1.83 (4.2)	<.001

^a Treatment completion defined as completion of all 6 sessions of their assigned treatment by participants in Sleep Healthy Using the Internet or Sleep Healthy Using the Internet–Black Women’s Health Study.

^b Calculated as total time spent asleep divided by total time spent in bed, multiplied by 100.