The independent effects of global intelligence and education at 18 y of age with respect to the risk of SDH during a median follow-up of 35 y in 440,742 men.

Hazard ratios (HR) and 95% confidence intervals (95% CI) are presented for low, medium and high global intelligence and four different levels of education. The Cox regression models were adjusted for age at baseline, conscription place and year of conscription.