Data analysis
The statistical analysis of the data was carried out by the author Dr.
Idiberto José Zotarelli Filho, MSc, Ph.D., and interpreted by the other
co-authors. For data analysis, a database was built on a Microsoft Excel
spreadsheet that was exported to the Minitab 18® statistical program
(version 18, Minitab, LLC, State College, Pennsylvania, USA) (Minitab®)
[16]. Common descriptive statistical analysis was performed,
obtaining the values of total N, mean, standard deviation, confidence
interval (CI), and percentage (frequency) for the variables involved.
The Variance (α2) and One-Way (ANOVA) test were applied, adopting the α
level less than 0.05 with a statistically significant difference for the
95% CI. The value of R-sq (R2) was analyzed to discover the imprecision
or heterogeneity of the analyzes, adopting the codes of low association
≤25%, medium association 25% <X <50%, and high
association≥50%.