Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13195-017-0262-x/MediaObjects/13195_2017_262_Fig1_HTML.gif)
Flowchart of the present study describing the selection criteria for the HMS dementia panels (a); HUNT 1 and HUNT 2 (b); and how these two studies were linked (c). HMS Health and Memory Study of Nord-Trøndelag (1995–2010), MCI Mild cognitive impairment, HUNT 1 Helse Undersøkelse Nord-Trøndelag (1984–1986), HUNT 2 Helse Undersøkelse Nord-Trøndelag (1995–1997), Q1 Questionnaire 1, Q2 Questionnaire 2, AD Alzheimer disease, VaD Vascular dementia