Table 5

Results for the regression of dummy variables indicating income decile against total drug costs

Explanatory Variables
Household income
Neighborhood Income
Household income (without covariates)
Neighborhood Income (without covariates)

Income decile 1
-169.00 (-30.27)
-59.162 (-10.57)
-68.22 (-9.87)
-14.57 (-2.65)
Income decile 2
-297.08 (-53.20)
-128.26 (-22.92)
-405.50 (-58.67)
-96.59 (-17.61)
Income decile 3
-305.05 (-54.63)
-91.67 (-16.38)
-289.43 (-41.87)
-80.34 (-14.65)
Income decile 4
-232.39 (-41.62)
-85.20 (-15.22)
-179.73 (-26.00)
-72.91 (-13.29)
Income decile 5
-378.51 (-67.78)
-77.08 (-13.77)
-41.74 (-6.04)
-67.03 (-12.22)
Income decile 6
-257.56 (-46.13)
-74.33 (-13.28)
-40.48 (-5.85)
-54.49 (-9.94)
Income decile 7
-207.80 (-37.21)
-64.83 (-11.58)
-34.68 (-5.02)
-44.99 (-8.21)
Income decile 8
-89.99 (-16.12)
-62.60 (-11.18)
-53.00 (7.67)
-39.09 (-7.13)
Income decile 9
-32.60 (-5.84)
-57.38 (-10.25)
-14.63 (-2.12)
-34.05 (-6.21)
Presence of seniors
787.81 (250.77)
790.37 (267.87)
Not included
Not included
Household size
105.43 (89.26)
104.65 (92.14)
Not included
Not included
Adjusted R2
0.101
0.06
0.01
0.01

Note: T statistics are in parentheses. All coefficients are significant at 95% confidence interval.

Hanley and Morgan BMC Health Services Research 2008 8:79   doi:10.1186/1472-6963-8-79