Table 3.

Meaningful improvements in insomnia severity from baseline to 8 weeks after the training began and from baseline to 6-month follow-up.

Meaningful improvements in insomnia severity		Meaningful improvement		Number needed to treat (95% CI)
		Internet-delivered cognitive behavioral therapy for insomnia group, n (%)	Control group, n (%)
From baseline to 8 weeks after the training began
	Slight	57 (65)	16 (18)		2.14 (1.68 to 2.94)
	Moderate	28 (32)	4 (4)		3.66 (2.63 to 5.99)
	Marked	20 (23)	3 (3)		5.17(3.46 to 10.17)
From baseline to 6-month follow-up
	Slight	60 (68)	25 (28)		2.49 (1.87 to 3.76)
	Moderate	16 (18)	6 (7)		8.74 (4.75 to 54.21)
	Marked	75 (85)	86 (97)		8.87 (5.07 to 32.32)