Statistical analysis
Data analysis was performed using Chi-square analysis to test
differences in nominal variables between groups, Fisher test was used
when there were no criteria for using Chi-square test, and Mann-Whitney
test was used for quantitative variables. All reported p values
represented two-tailed tests, with values <0.05 considered
statistically significant.
The study was conducted according to the principles of the Declaration
of Helsinki and was approved by the Ethics Committee of University
Regional Hospital of Málaga. All the participants were informed orally
about the study and gave the corresponding informed consent.