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.

value Incremental 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 ; **General   ***General .