## 2 Materials and Methods
\begin{table}
\begin{tabular}{c c c c c c c} \hline
**References** & **Study Design** & **Domain 1** & **Domain 2** & **Domain 3** & **Domain 4** & **Domain 5** \\ \hline [PERSON], 2019 [13] & Case study & Low & High & High & High & High \\ \hline [PERSON] et al., 2018 [3] & Descriptive study (26 specimens) & Low & Low & High & High & Unclear \\ \hline [PERSON] et al., 2002 [14] & Retrospective study & Low & Low & Low & High & Unclear \\ \hline [PERSON] and [PERSON], 1997 [15] & Case study & Low & High & Low & Low & Unclear \\ \hline [PERSON] et al., 2017 [16] & Observational descriptive study & Low & Low & Low & High & Unclear \\  & (15 specimens) & Low & High & Low & High & Unclear \\ \hline [PERSON] et al., 2020 [17] & Case study & Low & High & Low & High & Unclear \\ \hline [PERSON] et al., 1998 [18] & Case study & Low & High & Low & High & High \\ \hline [PERSON] et al., 2018 [19] & Case study & Low & Low & High & High & High \\ \hline [PERSON], 2016 [20] & Case study & Low & Low & High & High & High \\ \hline [PERSON], 2016 [21] & Case study & Low & Low & Low & High & High \\ \hline [PERSON], 2006 [22] & Case study & Low & Low & High & High & High \\ \hline [PERSON], 2019 [23] & Case study & Low & Low & Low & High & High \\ \hline [PERSON], 2015 [24] & Case study & Low & Low & High & High & High \\ \hline [PERSON], 2018 [25] & Case study & Low & Low & High & Low & High \\ \hline [PERSON], 2013 [26] & Case study & Low & Low & Low & High & High \\ \hline [PERSON], 2014 [27] & Case study & Low & High & High & High & Unclear \\ \hline [PERSON] and [PERSON]. 2011 [5] & Case study & Low & High & High & High & Unclear \\ \hline [PERSON], 2004 [6] & Descriptive study & Low & Low & Low & High & Unclear \\ \hline [PERSON], 2017 [28] & Case study & Low & Low & High & High & Low \\ \hline [PERSON], 2020 [29] & Case study & Low & High & Low & High & Low \\ \hline [PERSON], 2005 [30] & Case study & Low & High & Low & High & Unclear \\ \hline [PERSON], 2018 [31] & Case study & Low & High & High & High & Unclear \\ \hline [PERSON], 1995 [32] & Descriptive (29 specimens) & Low & Low & Low & High & Unclear \\ \hline [PERSON] et al., 2018 [33] & Case study & Low & Low & High & High & Low \\ \hline [PERSON] et al., 2019 [34] & Retrospective study & High & High & High & Low & Low \\ \hline [PERSON] et al., 2021 [35] & Case series & Unclear & Low & Low & Low & Low \\ \hline [PERSON] et al., 2015 [36] & Retrospective study & Low & Low & Low & Low & Low \\ \hline [PERSON] et al., 2020 [37] & Retrospective study & Low & Low & Low & Low & Low \\ \hline [PERSON] et al., 1986 [38] & Case series & High & High & High & Low & High \\ \hline [PERSON] et al., 2003 [39] & Case series & Low & Low & High & Unclear & Low \\ \hline [PERSON] et al., 2012 [40] & Case series & Low & Low & Low & Low & Low \\ \hline [PERSON] and [PERSON], 1988 [41] & Case series & Low & Low & Low & Low & Low \\ \hline [PERSON] et al., 2004 [42] & Case series & Low & Low & High & Low & Low \\ \hline [PERSON] et al., 2009 [43] & Case series & Low & Low & Low & Low & Low \\ \hline [PERSON] et al., 1989 [44] & Case series & Low & Low & Low & Low & Low \\ \hline \end{tabular}  
* Anatomical quality assurance checklist: Domain 1: objective(s) and subject characteristics; Domain 2: study design; Domain 3: methodology characterization; Domain 4: descriptive anatomy; Domain 5: reporting of results ([PERSON] et al. [12]).  
\end{table} 
Table 1: Anatomical quality assurance checklist. The data extracted in the meta-analysis were interpreted to calculate the prevalence of splenic artery variants using the JAMOVI statistical tool. The DerSimonian-Laird model with a Freeman-Tukey double arcsine transformation was used to combine the summary data. In addition, a random effects model was used because of the highly heterogeneous splenic artery prevalence data. The heterogeneity degree between the included studies was assessed using the chi\({}^{2}\) test and the heterogeneity (I\({}^{2}\)) statistic.