Table 2.

Estimated total numbers of cases, prevalence, and incidence of idiopathic cardiomyopathy in Japan (1998)

Classification	Estimated total number in Japan	95% CI	Estimated crude prevalence (per 100000 population)	Estimated crude incidence (per 100000 person-years)
DCM	17700	16500 to 18800	14.0	3.58
HCM	21900	20000 to 23200	17.3	4.14
RCM	300	250 to 350	0.2	0.06

CI, confidence interval; DCM, idiopathic dilated cardiomyopathy; HCM, idiopathic hypertrophic cardiomyopathy; RCH, idiopathic restrictive cardiomyopathy.