Cost-effectiveness ratios and cost-utility ratios will be calculated using bootstrapping techniques according to the bias corrected percentile method.
The confidence intervals for absolute and relative changes in the daily cost were calculated using bootstrap methods.
Standard errors are calculated using bootstrap with 500 replications (standard errors are corrected for sampling weights and cluster correlation) *Significant at 10%%; **significant at 5%%; ***significant at 1 % Source: Estimation from the 2009 UPS.
Multi-rater agreement was calculated and its confidence interval was calculated using bootstrap technique.
Confidence intervals around the AUC were calculated using bootstrap re-sampling methods with 1000 repetitions [16].
Inter-rater reliability was estimated with the weighted and unweighted Kappa statistic of nominal categorical and ordered categorical variables respectively, and 95% confidence intervals were calculated using bootstrap estimation of standard error for Kappa.
95% confidence intervals was calculated using bootstrap.
Confidence intervals for the difference in medians were calculated using bootstrap methods.
95% confidence interval (CI) for the kappa statistics were calculated using bootstrap with 1000 replications.
Confidence intervals and the p-values were calculated using bootstrap methods with 10000 simulations (SAS 9.2).
