Table 1

Baseline characteristics of the study population across included cohorts

DCHSNAC-KSALTMDCPPSTotal
Enrolment areaCopenhagen, AarhusStockholm cityStockholm countyMalmöGothenburg
Total participants, N47 3101157589119 350468178 389
Recruitment period1993–19972001–20041998–20021991–19961970–1973
Follow-up time (years)20.3
(6.2–22.0)
13.4
(0.9–15.3)
16.2
(3.5–18.6)
21.1
(7.8–23.2)
29.5
(15.4–39.8)
20.2
(6.2–23.7)
Stroke cases, N4375120524167210867777
Men, %47.740.145.240.410048.7
Age at inclusion55.9
(50.7–64.1)
66.1
(60.2–87.6)
56.1
(44.3–78.8)
56.3
(47.1–67.1)
51.2
(47.6–54.4)
55.6
(48.3–65.6)
Educational level, %
 Low24.719.325.362.768.834.0
 Medium50.336.936.319.420.241.8
 High25.043.838.418.011.024.3
Marital status, %
 Married/Cohabiting77.153.467.867.786.275.1
Area-level income, %
 First quartile33.72.46.920.125.828.3
 Second quartile22.5010.319.322.120.7
 Third quartile17.0018.527.224.619.1
 Fourth quartile26.897.664.433.527.532.0
Smoking status, %
 Current35.818.520.328.239.633.3
 Former28.540.236.433.733.230.5
 Never35.741.443.438.127.236.3
Physical activity, %
 Low51.171.854.350.824.949.8
 Medium19.921.936.621.858.824.3
 High29.06.39.127.416.325.9
BMI25.5
(20.5–33.1)
25.3
(20.1–32.4)
24.2
(19.6–30.7)
25.0
(20.2–32.4)
25.1
(20.7–30.5)
25.3
(20.3–32.7)
Smoking intensity, g/day*14.9
(3.9–34.0)
7.5
(1.3–20.0)
13.0
(3.0–30.0)
15.0
(2.0–30.0)
14.6
(3.0–33.3)
 Missing, %1.81.3001.5
Alcohol intake, %†
 Daily19.910.29.018.7Missing17.3
 Weekly60.155.263.836.9Missing52.5
 Seldom17.329.324.530.4Missing19.0
 Never2.65.22.713.0Missing4.2
 Missing0.0600.031.11007.1
  • Median and 5–95 percentiles, unless otherwise stated.

  • *Among smokers.

  • †Only available for a subpopulation of the entire cohort.

  • BMI, body mass index; DCH, Diet, Cancer and Health; MDC, Malmö Diet and Cancer Study; PPS, Primary Prevention Study; SALT, Stockholm part of the Screening Across the Lifespan Twin Study; SNAC-K, Swedish National Study of Aging and Care in Kungsholmen.