2.6. Statistical Analysis
SE
REGRESSION, SENSITIVITY
Quantitative variables were expressed as mean values (standard deviation; SD) or as median (interquartile range; IQR), while qualitative variables were expressed as absolute and relative frequencies. For comparison of proportions, chi-square and Fisher’s exact tests were used. Independent samples Student’s t-tests or Mann-Whitney U tests were used, as appropriate, for comparisons between Group A and Group B. Repeated measurements analysis of variance (ANOVA) was applied to evaluate changes in total protein intake between groups over the donor milk period. In order to evaluate the change in pasteurized donor milk quantity received by the study population over the donor milk period, linear mixed regression was applied and regression coefficients (β) with standard errors (SE) were computed. Sensitivity analysis was also run after excluding infants born to mothers with multiple pregnancies. All reported 