Table 1.

Annual incidence and median age at diagnosis for each type of cardiomyopathy (CM).

Type of CM	Age range at diagnosis	Number of cases		Median age at diagnosis	Annual incidence per 100,000 children		References
		All cases	Age at diagnosis <1 y		All cases	Age at diagnosis <1 y
DCM	0–18 y	239	–	1.8 y	0.58	4.58	PCMR (7)
	0–10 y	184	121	7.5 m	0.73	4.76	NACCS (17)
	0–20 y	56	29	1.1 y	0.34	3.8	Finland study (18)
HCM	0–18 y	196	–	5.9 y	0.47	3.2	PCMR (7)
	0–10 y	80	48	5.7 m	0.32	1.89	NACCS (17)
	0–20 y	40	2	13 y	0.24	0.26	Finland study (18)
RCM	0–10 y	8	0	3 y	0.03	0	NACCS (17)
	0–20 y	6	0	7.2 y	–	0	Finland study (18)
Othera	0–18 y	15	–	–	0.04	–	PCMR (7)
Unclassifiedb	0–10 y	42	30	3.8 m	0.17	1.18	NACCS (17)
Total	0–18 y	467	193	–	1.13	8.34	PCMR (7)
	0–10 y	314	199	–	1.24	7.84	NACCS (17)
	0–20 y	107	31	–	0.65	4.1	Finland study (18)

^aIncludes restrictive and other identified types of CM.

^bIncludes LVNC (29 of 42 cases).