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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Epidemiology. 2013 Jan;24(1):14–22. doi: 10.1097/EDE.0b013e3182762403

Table 2. Mean Hamilton Depression Rating Scale scores according to study arm (intervention or usual care) and baseline financial strain or census-tract poverty.

Study Arm
Intervention
effect
(Group
Difference in
Mean
Change from
Baseline)a
Mean (SE)
Study Arm
Intervention
effect (Group
Difference in
Mean
Change from
Baseline)a
Mean (SE)
Differential Effect
of the trial
interventionb
Mean (95% CI)
Intervention
Mean (SE)
Usual Care
Mean (SE)
Intervention
Mean (SE)
Usual Care
Mean (SE)
Financial Strain

Baseline Financial Strain
No Baseline Financial Strain
Baseline 22.0 (1.3) 16.7 (1.2) 18.0 (0.5) 17.4 (0.5)
4 months 14.5 (1.4) 15.2 (1.3) −5.9 (2.6) 10.5 (0.5) 12.8 (0.5) −2.9 (1.0) −3.1 (−8.5, 2.4)
8 months 11.7 (1.4) 12.1 (1.3) −5.7 (2.6) 10.1 (0.5) 11.0 (0.5) −1.4 (1.0) −4.3 (−9.8, 1.2)
12 months 10.2 (1.5) 12.1 (1.6) −7.2 (2.8) 9.6 (0.6) 10.3 (0.6) −1.3 (1.0) −6.0 (−11.8, −0.2)
18 months 10.0 (1.5) 11.5 (1.5) −6.7 (2.7) 9.2 (0.6) 9.3 (0.6) −0.7 (1.0) −6.1 (−11.8, −0.3)
24 months 11.9 (1.5) 10.4 (1.5) −3.8 (2.8) 8.7 (0.6) 9.1 (0.6) −0.9 (1.1) −2.9 (−8.7, 2.9)
Census Tract Poverty
Medium or High Census Tract Poverty
Low Census Tract Poverty
Baseline 18.8 (0.8) 17.9 (0.8) 18.3 (0.5) 17.0 (0.6)
4 months 11.8 (0.9) 14.3 (0.8) −3.5 (1.7) 10.7 (0.6) 12.6 (0.6) −3.2 (1.1) −0.3 (−4.3, 3.6)
8 months 10.0 (1.0) 11.7 (0.9) −2.6 (1.7) 10.4 (0.6) 10.8 (0.6) −1.7 (1.1) −0.9 (−5.0, 3.1)
12 months 9.4 (1.0) 10.3 (0.9) −1.8 (1.8) 9.7 (0.6) 10.6 (0.7) −2.1 (1.2) 0.3 (−3.9, 4.5)
18 months 10.4 (1.0) 9.5 (0.8) −0.1 (1.8) 8.9 (0.6) 9.6 (0.7) −2.0 (1.2) 1.9 (−2.3, 6.0)
24 months 11.3 (1.1) 9.0 (0.9) 1.3 (1.8) 8.4 (0.6) 9.4 (0.7) −2.3 (1.2) 3.6 (−0.6, 7.8)
a

The intervention effect is defined as the intervention minus usual care difference in the change in score from baseline.

b

Differential effect defined as the intervention effect in the less advantaged group minus the intervention effect in the more advantaged group. Differential effects<0 indicate greater reductions (from baseline) in scores in the less advantaged group than in the more advantaged group.