Overweight and chronic illness--a retrospective cohort study, with a follow-up of 6-17 years, in men and women of initially 20-50 years of age.

A retrospective cohort-study with a follow-up of 6-17 years was carried out in four general practices in the Netherlands in the period 1967-1983. In total 317 overweight men and 565 overweight women were followed in a continuous morbidity registration, starting in the year they were diagnosed as overweight (at age 20-50 years). Incidence of illnesses in this group was compared to that in a control group (444 men and 627 women not registered overweight), matched on sex, age and calendar-year at start of follow-up. The incidence of registered morbidity in the overweight group was higher for diabetes, gout, arteriosclerotic disease, arthrosis for men and women, and also for varicose veins for women. Increasing BMI at start of follow-up was associated with increased risk for most illnesses under study. For gout and arteriosclerotic disease in men, overweight appeared to be a risk factor at lower levels of BMI than in women.