Figure 3.

Relationship between education and the chance of survival after out-of-hospital cardiac arrest. Model 1: adjusted for age, sex, year, retirement status, and marital status. Model 2: Model 1 + Charlson Comorbidity Index. Model 3: Model 2 + income. Model 4: Model 3 + witness status, emergency medical services response time, location, bystander cardiopulmonary resuscitation, cardiopulmonary resuscitation by firefighter or police, and etiology. Model 5: Model 4 + initial rhythm. Model 6: Model 5 + route distance to nearest hospital. Model 7: Model 6 + proportion of foreign-born in area of cardiac arrest. RR indicates risk ratio.