Table 2.

Time and amount of parenteral nutrition, enteral nutrition and breast milk in preterm infants who received continuous infusion of calcium and those received bolus infusion of calcium

variables	Continuous infusion group (n = 40)	Bolus infusion group (n = 38)	P-value
Duration of intravenous infusion of calcium (days) $	17.5 (10.0)	19.8 (9.3)	0.295†
Amount of infused gluconate calcium 10% (ml/kg/day) $	4.0 (0.4)	3.3 (0.4)	< 0.001†
Amount of sodium glycerophosphate (ml/kg/day) $	1.0 (0.1)	0.9 (0.0)	0.498†
Start of breast milk (days) #	3 (1–7)	2 (1.0-3.2)	0.130*
Reach to 100 ml/kg of enteral feeding (days) $	24.3 (12.0)	17.6 (9.6)	0.008†

^$ Mean (SD)

^# Median (quartile 1, quartile 3)

^† Independent t-test

^* Mann-Whitney U test