Data were maintained in an Excel spreadsheet (Microsoft Inc., Redmond, WA, USA), and the statistical analyses were performed on an intention-to-treat basis using the SPSS software (SPSS, v. 22 for Windows; SPSS Inc., Chicago IL, USA) and the R/R Studio software. All randomized patients undergoing at least one embolization procedure comprised the modified intention-to-treat population used for the analyses [48 (link),49 (link)]. The normality assumption of the data was verified using the Kolmogorov–Smirnov and Shapiro–Wilk tests. Frequency (% value) is the presentation format for categorical data [50 (link)]. Data with a continuous normal distribution are shown as mean ± standard deviation. Data that are continuous but not normally distributed are shown as the median (first to third quartile) [51 (link),52 (link)]. An unpaired Student’s t-test was used to assess statistical differences for continuous normally distributed data, while categorical and continuous not normally distributed data were assessed using the Chi-squared/Fisher’s exact tests and the Mann–Whitney test, respectively [53 (link),54 (link),55 (link)]. A p-value of <0.05 was considered statistically significant for the aforementioned tests.
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