The participants were presumably mostly Caucasian, as they were born in Sweden in the early 1900s. No additional information about ethnicity was given.
Diagnosis & Evaluation Methods
For details on diagnosis and screening methods see Zylberstein et al. 2011.
Zylberstein D,Lissner L, Björkelund C, et al. Midlife homocysteine and late-life dementia in women. A prospective population study. Neurobiology of aging; 2011; 32: 380-386.
Bengtsson, C, Blohme G, Hällström,T.,et al. The study of women in Gothenburg 1968–1969 a population study. General design, purpose and sampling results. Acta Med. Scand. 1973; 193(4: 311–318.