Table 2. Demographic variables.

S. No	Variables	Patient values	Normal values
1	Age (mo)	5.5 ± 3.3 (median = 4)
2	Weight (kg)	5.97 ± 1.15 (median = 5.75)
3	LVEF % (admission)	20.5 ± 6.85 (median = 20)	50–60%
4	Ionized serum calcium (mmol/dL)	0.78 ± 0.11 (median = 0.8)	1.1–1.3
5	Total serum calcium (mg/dL)	7.3 ± 1.1 (median = 7.5)	9.6–10.6
6	Serum magnesium (mg/dL)	1.9 ± 0.5 (median = 1.8)	1.7–2.2
7	Serum phosphorus	4.4 ± 0.76 (median = 4.3)	3.4–4.5
8	Serum parathormone (pg/mL)	183.2 ± 127 (median = 137.5)	10–65
9	Serum alkaline phosphatase (IU/dL)	414 ± 296 (median = 327)	50–100
10	QTc (msec)	511 ± 52 (median = 500)	<440
11	LVEF % (follow-up)	50.1 ± 12 (median = 50)	50–60%

Abbreviations: LVEF, left ventricle ejection fraction; QTc, corrected QT interval.

As this was a retrospective observational study, no ethical clearance was sought.