Table 4. Mean age in years of normal and abnormal results.

	n	Mean (SD)
Age of normal echocardiography	39	7.6 (3.94)
Age of abnormal echocardiography	14	8.5 (4.90)
Age of dilated left ventricle	9	7.8 (2.68)
Age of tricuspid valve insufficiency	5	13.6 (2.97)
Age of normal ECG	8	4.1 (1.96)
Age of abnormal ECG	4	11.0 (5.23)
Age of normal X-ray	35	9.9 (4.51)
Age of abnormal X-ray (cardiomegaly)	18	4.7 (3.16)