Table 3.

Prevalence and rates of reported first occurrence of a cardiac condition

	Survivors			Siblings
	Prevalence (n (%))	Rate (95% CI) per 10 000 person years§		Prevalence (n (%))
Congestive heart failure*	248 (1.7)	9.7 (9.4 to 10.1)		7 (0.2)
Myocardial infarction	101 (0.7)	2.8 (2.4 to 3.3)		6 (0.2)
Pericardial disease†	181 (1.3)	5.8 (5.4 to 6.4)		13 (0.3)
Valvular abnormalities‡	238 (1.6)	6.4 (5.9 to 7.1)		21 (0.5)

*Congestive heart failure or cardiomyopathy.

^†Pericarditis or pericardial constriction.

^‡Stiff or leaking heart valves.

^§Age adjusted and predicted at median survivors’ age of 20 years; too few events for stable age adjusted rate estimation among siblings.