Study on Nutrition and Cardiovascular Risk in Spain.

Data collection comprised 3 sequential stages:

1. computer-assisted telephone interview to obtain information on lifestyle, knowledge and attitudes about cardiovascular disease risk factors, and the signs and symptoms of heart attack and stroke, subjective health, and morbidity;
2. first homevisit, to collect blood and urine samples for analysis by a central laboratory;
3. second home visit, to measure anthropometric variables and blood pressure and to administer a computer-assisted dietary history; data on functional limitations are also collected from participants aged 65 years and older.