The data were recorded and organized in a Microsoft Excel spreadsheet (Microsoft Inc, Redmond, WA, USA), while statistical analyses were conducted based on the intention-to-treat principle using SPSS software (version 22 for Windows; SPSS Inc, Chicago, IL, USA) and R/R Studio software. The Modified Intention-To-Treat population, consisting of all randomized patients who underwent at least one embolization procedure, was utilized for the subsequent analyses [37 (link),38 (link)]. Kolmogorov–Smirnov and Shapiro–Wilk tests were performed to verify the normality assumption of data. Categorical data are presented as frequencies (% value) [39 (link)]. Continuous data with a normal distribution are expressed as mean ± standard deviation, whereas continuous data that do not follow a normal distribution are presented as median (first to third quartile) [40 (link),41 (link)]. Statistical differences in continuous data with a normal distribution were assessed using the unpaired Student t-test, while categorical data and continuous data without a normal distribution were evaluated using the Chi-squared/Fisher’s exact tests and the Mann–Whitney test, respectively [42 (link),43 (link),44 (link)]. A p-value of less than 0.05 was considered statistically significant for all the aforementioned tests.
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