 Statistical analysis The investigators will use two-tailed Wilcoxon-Mann-Whitney test for means and two-tailed Fishers exact test for proportions. The investigators will use Kaplan-Meier curves for construction of time to discharge graphs and Mann-Whitney U test for statistical difference between the curves. The investigators will perform multivariate analysis of different characteristics to test for effect of those characteristics on the result of mean pain index as reported by the patient. If any of the characteristic shows statistically significant effect, the investigators will perform univariate analysis on those covariates. 