Table 2.

Mixed Effects Regression Model for Stroop Color Word Test Performance (n=221)

Effect	Num DF	Den DF	F Value	P-value
HDRS	1	312	8.51	0.004
Treatment type	1	203	0.00	1.00
HDRS * Treatment type	1	312	1.70	0.193
Site	1	203	0.85	0.359
Week	1	312	8.50	0.002
Week * Treatment type	1	312	3.25	0.072
Age	1	202	2.12	0.147
Gender	1	202	3.81	0.052
Education	1	202	0.96	0.329
Ethnicity	1	202	0.05	0.829

HDRS=Hamilton Depression Rating Scale total score; Treatment type=Problem Solving Therapy or Supportive Psychotherapy; Week = Weeks from baseline evaluation; Age = Age in years; Education = years of education