Table 3.

Model fit statistics for individual and final combined nested Cox regression model predicting time until treatment disengagement^a.

			Nagelkerke R2	Concordance
Individual models
	Age	0.0065		0.52
	Education	0.0036		0.52
	First time in therapy	0.0022		0.51
	Marital status	0.0028		0.51
	Therapist experience	0.0030		0.51
	Therapist with depression-specific expertise	0.0015		0.51
Final model			0.018	0.54

^aDisengagement from treatment was defined as >4 weeks without any client-initiated communication to the therapist, such as texting, video exchanges, images, or audio clips. The modeling included up to 52 weeks of therapy.