*2.3. Statistical Analysis*

Intraclass correlation coefficients (ICC) with a 95% confidence interval (CI) were calculated for all measurements. As recommended by Landis and Koch, an ICC < 0.20 resembles slight agreement, 0.21 to 0.40, fair agreement, 0.41 to 0.60, moderate agreement, 0.61 to 0.80, substantial agreement, and >0.81, almost perfect agreemen<sup>t</sup> [19]. After a reliability assessment, the values of both raters were averaged for further analysis. The Kolmogorov–Smirnov test was used to test for normal distribution. The two-sample *t*-test (for parametric distribution) or the Mann–Whitney U test (for nonparametric distribution) were used to compare continuous variables between groups. For statistical analyses, IBM

SPSS Statistics 25.0 software (IBM, Armonk, NY, USA) was employed. A *p*-value < 0.05 was considered significant.

**Figure 7.** Measurements of theoretical glenoid component inclination (**a**) and version (**b**) by determining the angle between the native glenoid surface and the glenoid guide pin. A guide pin placed with more inclination or retroversion leads to a larger recorded angle.
