2.4 Statistical analysis
Kolmogorov-Smirnov Z-test was used to determine the normal distribution
of continuous variables. Continuous data are presented as mean±SD or
median (interquartile range). The χ2 test and unpaired
Student’s t-test were used to compare categorical and continuous
variables respectively between two different groups of patients. Within
group changes from baseline and post-dipyridamole were assessed using
the paired Student’s t-test. Changes in studied echocardiographic
parameters following dipyridamole administration were compared using
Repeated Measures ANOVA analysis. P values were always two-sided and a
value of p<0.05 was considered significant. The SPSS
statistical software package (IBM SPSS Statistics, Version 23) was used.