Table 6.

Prevalence of abnormalities in the resting electrocardiogram in children and adults with MPS.

	Overall (n = 65)	Children (n = 45)	Adults (n = 20)	p-value
Ventricular repolarization abnormalities	19/65 (29%)	7/45 (16%)	12/20 (60%)	0.001*
Left atrial enlargement	5/65 (8%)	0/45 (0%)	5/20 (25%)	0.002*
Right axis deviation	5/65 (8%)	2/45 (4%)	3/20 (15%)	0.165
Left ventricular overload	3/65 (5%)	2/45 (4%)	1/20 (5%)	1.000
Right ventricular overload	3/65 (5%)	3/45 (7%)	0/20 (0%)	0.547
Intraventricular block	3/65 (5%)	1/45 (2%)	2/20 (10%)	0.222
Atrioventricular block	3/65 (5%)	2/45 (4%)	1/20 (5%)	1.000
Right atrial enlargement	2/65 (3%)	2/45 (4%)	0/20 (0%)	1.000
Prolonged QRS	1/65 (2%)	1/45 (2%)	0/20 (0%)	1.000

Statistical analysis with Fisher's exact test.

^*p < 0.05.