Fig. 1

Age- and sex-adjusted incidence of total dementia according to quartiles of vegetable (A) and fruit intake (B) at baseline in older Japanese adults aged ≥60 years from 1988 to 2012. The incidence of dementia was calculated by the person-years method. The age- and sex-adjusted incidence rates of total dementia were calculated using a Poisson regression model including age and sex, where the variables of log-transformed person-years were used as the offset term