The swedish and Norwegian dara s.,..
gest a heritability of around 0.8, whereas the Finnish data suggest a somewhat lower hei
abiiity in the region of 0.14. The reasons for these different heritability estimates are .
ciear. It may be relevant that the Finnish study employed hospital discharge data, ,vher...
the other samples were ascertained from community settings. tn the usa the Age- ..
veteran Twins Study is ur.rderwayi but the cohort is not yet old enough to allow the c,, _
cordance rate of AD in trvin pairs to be estimated with any accuracy