Figure 5.

Fitted Proportions: Logistic Regression Model for Substance Dependence. The logistic equation is: -0.98 + 1.37842 (Arth/Rheum) - 0.057 (Age) - 0.56(Sex) - 0.024 (Arth/Rheum by Age) - 0.016 (Age by Sex). Fitted proportions: odds/1 + odds