Spss 21.0.0 for windows

The continuous variables are presented as means and standard deviations or, if skewed, as medians and interquartile ranges. The categorical variables are presented as absolute numbers and percentages. The continuous variables were compared using the Student’s t-test or the Mann-Whitney U test, as appropriate. Categorical data were compared using the chi-square test. The most relevant factors associated with a response to EBP were included in a univariate logistic regression analysis. The inclusion of variables in the final multivariate logistic regression analysis evaluating factors independently associated with a poor response was based on biological plausibility, clinical importance and statistical considerations (p < 0.10). All statistical analyses were performed using SPSS 21.0.0 for Windows (SPSS Inc., Chicago, IL, USA), with two-tailed P values <0.05 considered statistically significant.

Categorical variables were compared with the chi-square test and Fisher’s exact test. All analyses were performed using SPSS 21.00 for Windows (SPSS Inc., Chicago, IL, USA). A p-value < 0.05 was considered statistically significant.