Statistical analysis of raw data was performed with SPSS®, IBM 2009, version 19 (2010), and Excel (v. 2010). We performed descriptive statistics, Kolmogorov–Smirnoff, T-tests, Mann–Whitney, ANOVA, χ2 or Fisher’s Exact test, correlation analysis. Significance level p < 0.05 was considered significant.
The study’s principal investigators performed data collection according to the hospital’s ethical and other policies and good clinical practice. The data were collected and coded uniformly to avoid any potential sources of bias. All efforts were made on the part of the authors to address potential bias. The statistical analysis was performed, omitting empty entries in the case of missing data (but no more than 5% of all the data entries). No sensitivity analyses were performed in our study.
The study’s principal investigators performed data collection according to the hospital’s ethical and other policies and good clinical practice. The data were collected and coded uniformly to avoid any potential sources of bias. All efforts were made on the part of the authors to address potential bias. The statistical analysis was performed, omitting empty entries in the case of missing data (but no more than 5% of all the data entries). No sensitivity analyses were performed in our study.