Module 33Multiple Regression ExamplesReviewed 19 July 05 / MODULE 33This module contains several examples of the use of the multiple regression analytical procedure as published in AJPH
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Dependent variable
y = Quality of Well Being score (QWB) at two years
Independent variables
x1: Intervention
x1 = 1 if person was in intervention group
= 0 otherwise
x2:QWB at baseline
x2 = baseline score
x3:Gender
x3 = 1 if person was a male
= 0 otherwise, ie a female
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x4-5: Age
x4 = 1 if age 75-84
= 0 otherwise
x5 = 1 if age 85 +
= 0 otherwise
x6-7: CHQ
x6 = 1 if moderate
= 0 otherwise
x7 = 1 if severe
= 0 otherwise
x8: Physically active
x8 = 1 if 3 times per week
= 0 if < three times per week
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x9: Reduced weight
x9 = 1 if tried to lose weight
= 0 otherwise
x10:Medigap (Other insurance)
x10 = 1 if Medigap insurance
= 0 if otherwise, ie Medicaid
x11:Education
x11 = education level in years
x12:Education x Intervention interaction
x12 = (x11)*(x1)
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