Table 5. Binary logistic regression analysis of the selected risk factors for the need of exchange transfusion in 1,129 newborns with indirect hyperbilirubinemia.

Variable	Adjusted odd ratio	95% CI	P value
Length of hospitalization (day)	0.76	0.5 to 1.1	0.19
Hemoglobin (g/dL)	0.77	0.3 to 1.9	0.58
Hematocrit (%)	0.97	0.7 to 1.3	0.84
G6PD deficiency	0.13	0.01 to 1.5	0.09
Total bilirubin at admission (µmol/L)	0.99	0.9 to 1	0.92
Maximal bilirubin level (µmol/L)	1.04	1 to 1.08	0.03
Positive blood culture	0.37	0.01 to 11	0.57

Data of selected risk factors for the need of exchange transfusion that were found to be significant in univariate analysis and do not have multicollinearity using variation inflation factor >8.

CI, confidence interval; G6PD, glucose 6 phosphate uridyltransferase enzyme.