Table 1.

Clinical data of subjects older than two weeks

	Boys (n=72)	Girls (n=80)
Age (years), range	8.19 (5.25), 0.13–17.54	9.25 (4.75), 0.61–17.51
Body mass index (kg/m2)	17.9 (4.7)	18.2 (4.4)
Serum creatinine (mg/dl)*	0.43 (0.18)	0.44 (0.15)
Creatinine clearance* (ml/min/1.73 m2)†	156 (35)	166 (32)

Values are mean (SD).

*Available in 126 subjects.

†Estimated according to the formula k × body height (cm)/serum creatinine (mg/dl). The value for k is 0.55 in children >1 year and 0.45 in infants <1year.