Statistical analysis
Categorical data are presented as numbers and percentages, and
continuous variables presented by median and range. Patients after PC+BT
were compared to age-matched PEP+BT or BT alone.
Due to the small size of the study population, non parametric tests were
used: Kruskal-Wallis-test, Mann-Whitney test and Spearman test
(p<0.05 considered statistically significant), using IBM SPSS
24.0.