Table 4.

Patient Health Questionnaire-9 analysis results (n=1999).

	Model 1			Model 2			Model 3
	Estimate (95% CI)	tobsa (df)	P value	Estimate (95% CI)	tobs (df)	P value	Estimate (95% CI)	tobs (df)	P value
Intercept	12.43 (12.24 to 12.62)	130.55 (276)	<.001	12.51 (12.32 to 12.70)	130.54 (284)	<.001	12.38 (12.06 to 12.71)	74.43 (1247)	<.001
Week	–1.24 (–1.28 to –1.20)	56.79 (9682)	<.001	–1.24 (–1.28 to –1.20)	56.89 (9714)	<.001	–1.24 (–1.28 to –1.20)	56.88 (9717)	<.001
Week2	0.05 (0.05 to 0.06)	30.74 (11,000)	<.001	0.05 (0.04 to 0.05)	25.51 (12,000)	<.001	0.05 (0.04 to 0.05)	25.51 (12,000)	<.001
Therapy sessions in the last 7 days	–0.73 (–0.85 to –0.61)	11.87 (12,000)	<.001	–0.82 (–0.96 to –0.69)	12.07 (12,000)	<.001	–0.83 (–0.96 to –0.69)	12.08 (12,000)	<.001
Digital exercises in the last 7 days	–0.04 (–0.08 to 0.00)	2.18 (13,000)	.03	–0.03 (–0.07 to 0.01)	1.60 (13,000)	.11	–0.03 (–0.07 to 0.01)	1.59 (13,000)	.11
Digital lessons in the last 7 days	–0.10 (–0.17 to –0.03)	2.67 (12,000)	.01	–0.12 (–0.19 to –0.04)	2.95 (12,000)	.003	–0.12 (–0.19 to –0.04)	2.94 (12,000)	.003
Late phase	—b	—	—	0.38 (0.08 to 0.69)	2.45 (12,000)	.01	0.38 (0.08 to 0.69)	2.45 (12,000)	.01
Late phase*therapy sessions in the last 7 days	—	—	—	0.56 (0.27 to 0.84)	3.82 (12,000)	<.001	0.56 (0.27 to 0.84)	3.83 (12,000)	<.001
Late phase*digital exercises in the last 7 days	—	—	—	0.02 (–0.07 to 0.11)	0.43 (12,000)	.67	0.02 (–0.07 to 0.11)	0.43 (12,000)	.67
Late phase*digital lessons in the last 7 days	—	—	—	0.28 (0.09 to 0.46)	2.96 (12,000)	.003	0.28 (0.09 to 0.46)	2.96 (12,000)	.003
Age	—	—	—	—	—	—	0.01 (–0.01 to 0.02)	0.61 (1986)	.54
Gender	—	—	—	—	—	—	0.23 (–0.09 to 0.54)	1.41 (1991)	.16
Minority ethnicity	—	—	—	—	—	—	–0.07 (–0.38 to 0.24)	0.43 (1998)	.67
No ethnicity reported	—	—	—	—	—	—	0.28 (–0.45 to 1.00)	0.75 (2058)	.45

^at_obs: observed t test result.

^b—: not applicable (variables not entered into model).