Table 1

Characteristics of the sample, 271 643 participants from Norwegian health surveys

Sex
Male, n (%)132 170 (48.7)
Female, n (%)139 473 (51.3)
Year of birth, mean (SD), range1952 (5.5), 1940–1982
Year of screening, mean (SD), range1993 (4.9), 1974–2003
Age at examination, mean (SD), range40.6 (4.7), (15–62)
Follow-up time (years), mean (SD)19.0 (5.2)
Age at censoring (years), mean (SD), range60.0 (5.5), 30–72
Systolic blood pressure (mm Hg), mean (SD)130.2 (14.4)
Current treatment hypertension, n (%)5795 (2.1)
Total cholesterol (mmol/L), mean (SD)5.6 (1.1)
Height (cm), mean (SD)172.1 (8.9)
Body mass index (kg/m2), mean (SD)25.0 (3.7)
Smoking, n (%)108 218 (39.8)
Deaths during follow-up, n (%)13 798 (5.1)
CVD deaths, n (%)2512 (0.9)
IHD deaths, n (%)1662 (0.6)
Cerebrovascular disease deaths, n (%)552 (0.2)
Age at death, mean (SD), minimum–maximum55.0 (7.2) (18–72)
Age at CVD death, mean (SD), minimum–maximum55.0 (7.1) (28–72)
  • CVD, cardiovascular disease; IHD, ischaemic heart disease.