Table 1 Variable importance measures from the random forest model for each covariate inserted into the model (i.e., age, sex, educational level (low-high), and economic status (no economic problems-economic problems)) using 2019 PASSI data (i.e., \(n= 31,746\) respondents)

From: A novel comorbidity index in Italy based on diseases detected by the surveillance system PASSI and the Global Burden of Diseases disability weights