“…Regarding personal information, the analysed studies take into account demographic data [71,84,105,119], such as the students' age [78][79][80][81][82]86,88,94,95,103,104,108,109,115], but also sociodemographic data [2], such as gender [78][79][80][81][82]86,88,94,95,98,103,104,[108][109][110]114,115], country of birth [88,104], race or ethnicity [108][109][110]115], regional origin or residence postal code [80,86,89,95,108,109,115], marital status ...…”