This study involved an age-period-cohort analysis of the consultation rate and prevalence of dyslipidemia in Japan, based on Patient Survey data from 1999 to 2017 and open data of national database of health insurance claims and specific health checkups in Japan from 2013 to 2016. Our results showed that the consultation rates were lower than the prevalence, regardless of age, year, and sex, and particularly among middle-aged and male respondents. Additionally, both the consultation rate and prevalence increased with increasing age to a greater extent among women than men, and the degree of increase in the consultation rate was larger than that in prevalence among women. Furthermore, although the cohort effect on prevalence began to decrease among men in cohorts born in approximately 1960, the effect decreased among women in cohorts born between the 1930s and 1960s and exhibited an increasing trend thereafter.
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