Figure 3.

Predicted Age Trajectories of SRH by Birth Cohort: Canadian National Population Health Survey, 1994-2010

Trajectories are as predicted by a growth model with random intercept and age. Model includes linear and quadratic age terms, sex, education, income, smoking status, and BMI.

Solid line: Average trajectory in the population was obtained from model with age terms and cohort effect. Dashed line: Trajectories were obtained assuming that there were no increases on BMI over time: average BMI is stable at 23kg/m².

Dotted line: Trajectories were obtained assuming that there were no improvements over time in education, income, and smoking: the average years of schooling is stable at 10 years, the average income at $40,000, and the distribution of smokers as in 1994.