2.4 Statistical analysis
Continuous data are presented as mean and standard deviation (SD).
Univariate and multivariate odds ratios for VT termination and
acceleration were estimated. A multilevel logistic regression was
applied to estimate the odds ratios since VT episodes were nested within
individuals. The multivariate model included RR interval variability of
VTs (regular or irregular), average VT rate (beats per minute
[bpm]), sex, ischemic cardiomyopathy, and use of an antiarrhythmic
drug, β-blocker, angiotensin-converting enzyme inhibitor (ACE-I), or
angiotensin II receptor blocker (ARB). Statistical analysis was
performed using STATA version 16 (StataCorp LP, College Station, TX,
USA). The level of statistical significance was set at p <
0.05.