Fig. 2.

Box plots represent the evaluation of the relationship between the availability of modern training technologies in each hospital and GDP per capita for each country. Paired t-test analysis revealed a highly significant (p ​< ​0.001) association of high GDP per capita as a positive predictor of the availability of advanced training modalities. The figures display the median with 25th and 75th percentile (box) of GDP per capita of countries, the upper and lower adjacent values (whiskers) and outliners (dots). T (538) ​= ​-5.40, p ​< ​0.001; n ​= ​540.