Chloride Balance in Preterm Infants during the First Week of Life

Table 2

Factors associated with plasma chloride (mmol/L), SID, and tCO₂ levels (mmol/L) at multivariate analysis in 107 infants <33 weeks of GA.

	𝑃 value	Incremental 𝑟^2	Beta coefficient
Plasma chloride*
Chloride intake	<0.001	0.14	+
HsPDA	<0.01	0.03	+
Sodium intake	<0.01	0.02	−
Weight loss % of BW	<0.01	0.02	+
GA	<0.05	0.01	−
SID**
Chloride intake	<0.001	0.09	−
HsPDA	<0.01	0.04	−
Sodium intake	<0.05	0.01	+
Phosphate intake	<0.05	0.01	+
GA	<0.05	0.01	+
tCO2***
Chloride intake	<0.001	0.13	−
GA	<0.01	0.02	+
Sodium intake	<0.05	0.01	+

(SID) strong ion difference; (tCO₂) total carbon dioxide; (hsPDA) hemodynamically significant patent ductus arteriosus; (BW) Birth weight; (GA) gestational age;
*General 𝑟²=0.22; **General 𝑟²=0.16  ***General 𝑟²=0.16.