Table 6

Overall and sex specific age adjusted mortality (hazard ratio with 95% CI) according to participation in the HUNT 1, HUNT 2 and the HUNT 3 study
Participation N Deaths Hazard ratio 95% CI
HUNT 1 (1984–86)
Women
Participated 38698 13450 1.00 Reference
Not participated 3571 1300 1.51 1.43-1.60
Men
Participated 36928 14206 1.00 Reference
Not participated 5018 1391 1.55 1.46-1.64
Overall
Participated 75626 27656 1.00 Reference
Not participated 8589 2691 1.50 1.44-1.57
HUNT 2 (1995–97)
Women
Participated 34469 5087 1.00 Reference
Not participated 9700 2833 1.82 1.74-1.91
Men
Participated 30237 5497 1.00 Reference
Not participated 12625 2261 1.64 1.56-1.73
Overall
Participated 64706 10584 1.00 Reference
Not participated 22325 5094 1.72 1.66-1.78
HUNT 3 (2006–08)
Women
Participated 27652 835 1.00 Reference
Not participated 19405 225 3.33 2.86-3.87
Men
Participated 22918 367 1.00 Reference
Not participated 23443 702 2.41 2.12-1.75
Overall
Participated 50571 619 1.00 Reference
Not participated 42848 1555 2.80 2.54-3.09

Adjusted for age by using age as the time scale.

The following subjects are excluded from the analyses: Persons < 20 years of age at baseline study, and deaths between invitation and August 1986, August 1997, and August 2008 for HUNT1, HUNT2 and HUNT3, respectively. The number of participants and nonparticipants therefore are lower than previously for the entire study population.

Langhammer et al.

Langhammer et al. BMC Medical Research Methodology 2012 12:143   doi:10.1186/1471-2288-12-143

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