Statistical analysis
Data analysis was performed using SPSS version 20.0. The Shapiro-Wilk
test was used in order to determine the standard of data normality.
Quantitative variables were expressed as mean and standard deviation,
intra-group comparison of preoperative values with values obtained at
hospital discharge were performed using the paired Student t test, and
the independent Student t test for inter-group analyzes. Spearman’s test
was used to correlate the muscle strength variable with the cardiac
anxiety outcome. P <0.05 was considered significant.