Results of univariate linear regression of change in the force of infection from 1985 to 2005 estimated using model 4 on demographic, socioeconomic, and climatic characteristics of provinces.

Change in school attendance, household size, percent of provincial population in urban areas, birth rate, gross provincial product, average rainfall, and average temperature were not statistically significantly associated with the change in the mean force of infection. Both median age and change in percentage of homes constructed with permanent materials significant in model that includes both.