Statistical Analysis
The statistical analysis of the data was performed by Dr. Idiberto José Zotarelli Filho and interpreted by the principal investigator. For data analysis, a database was built on the Microsoft Excel spreadsheet which was exported to the Minitab 18® statistical program (version 18, Minitab, LLC, State College, Pennsylvania, USA) (Minitab®) and also to the OriginPro® 9 (DPR Group, Inc., Northampton, Massachusetts, USA). A common descriptive statistical analysis was performed, obtaining the values of total n, mean and standard deviation, confidence interval (CI), and percentage for all the variables. The Chi-Square and the Poisson Probability Test were performed in relation to the occurrence of complications Low = 1, Moderate = 2 and NO = 0, adopting the α-level less than 0.05 with a statistical difference for 95% CI. The R-sq (R2) value was also analyzed among the complications variables, with the codes being adopted, low association = <25%, medium association 25% <X <50% and high association => 50%.