Statistical analysis
The Shapiro-Wilk test was used to test the normality of distribution of
variables. For uniformity, all continuous variables are presented as the
mean ± standard deviation. The categorical variables are presented as
number and percentage.
The significance of difference between groups were analyzed using the
unpaired “U” Mann-Whitney test for continuous variables and the
Chi2 test with Yates correction for categorical
variables. The results of analysis were considered statistically
significant at a p value < 0.05. Univariate and multivariate
logistic regression analysis was used to assess the impact of
echocardiographic findings on TLE complexity and efficacy. Variables
that in univariate analysis achieved statistical significance
p<0.05 were entered into the multivariate model. Statistical
analysis was performed with Statistica version 13.0 (TIBCO Software
Inc., Krakow, Poland)