Table 4.

Comparison of the mean scores on the 2-item Generalized Anxiety Disorder scale and the 8-item Patient Health Questionnaire between participants who only completed the baseline survey and subscribers who completed both the baseline and 60-day surveys.

Scale	Score at baseline, mean (SD)		Independent samples t test (df)	P value
	Subscribers who completed the baseline assessment but not the 60-day assessment (n=303)	Subscribers who completed both the baseline and 60-day assessments (n=193)
8-item Patient Health Questionnaire	9.41 (5.79)	9.30 (5.70)	0.208 (414)	0.84
2-item Generalized Anxiety Disorder scale	2.71 (1.87)	2.80 (1.89)	0.520 (406)	0.60