A. There is no correlation between percent area fibrosis and duration of HF in pediatric IDC patients. R2 = 0.05, n = 30, p = 0.22. Subset graph demonstrates no correlation with patient with 8 years of HF removed. R2 = 0.007, n = 29, p = 0.67. B. There is no correlation between percent area fibrosis and age at HF onset in pediatric IDC patients. R2 = 0.006, n = 30, p = 0.68. Linear regression analysis was done to determine the relationship between % area fibrosis and each parameter was analyzed for linearity, homoscedasticity, and normality of errors.