Statistical analysis:
Appropriate data entry and statistical analysis was performed on
Microsoft Excel 2010 (Microsoft, Redmond, WA) and SPSS software version
20 (SPSS, Inc, Chicago, IL). Descriptive statistics [number
(percentages) and median (interquartile range, IQR)] was used for
baseline variables. The infants
admitted to PICU were compared with those who do not required PICU
admission by using Chi square test for categorical variables and Mann
Whitney U test for continuous variables. Multivariate analysis was done
to find out independent predictors of PICU admission. All tests were
two-tailed and p value <0.05 was taken as significant.