The variable weight of the LASSO regression and description of dummy variables
| Variable | The variable weight of LASSO regression | Description |
| Continuous variables | ||
| Duration | 0.077 | |
| Pittsburgh Sleep Quality Index | 0.078 | |
| Fatigue Scale-14 | 1.687 | |
| Anxiety | 0.043 | |
| Depression | 0.004 | |
| Social support | −0.455 | |
| Categorical variables | ||
| Sex (male) | −0.171 | |
| Sex (female) | 0 | |
| Age (younger) | −3.198 | <35 |
| Age (older) | 0 | ≥35 |
| MITOS (stage 0–1) | −12.235 | MITOS stage 0,1 |
| MITOS (stage 2–4) | 0 | MITOS stage 2,3,4 |
| Economic status (common) | 0 | poor and average |
| Economic status (better) | 0 | good and excellent |
| Household (village) | 0 | suburban and rural |
| Household (city) | 0 | city |
| Educational level (low) | 2.136 | Illiterate, primary school, middle school, high school and technical secondary school |
| Educational level (high) | 0 | Junior college, undergraduate and master |
LASSO, least absolute shrinkage and selection operator; MITOS, Milano-Torinos.