Figure 1

Risk factor accumulation score by education and marital status and p values for interaction between education and study year or education and marital status. The risk factor accumulation score was formed from the following four risk factors: current smoking, obesity, elevated total cholesterol and hypertension. The classes were as follows: (1) no risk factors, (2) one risk factor, (3) two risk factors, and 4) three or four risk factors. The 95% confidence intervals (CI) are presented for years 1997 and 2017. The number of men and women in the analyses by education were 11540 and 13277, respectively, and in the analyses by marital status 11616 and 13380, respectively.