Relative importance and standardised coefficients of variables in XGBoost regression analysis
| Variable | Relative importance weight | Importance ranking | Standardised coefficient (β) | 95% CI |
| Pain knowledge training | 0.237 | 1 | 0.412 | 0.38 to 0.44 |
| Working department | 0.170 | 2 | 0.293 | 0.25 to 0.33 |
| KSBS Score | 0.135 | 3 | 0.181 | 0.15 to 0.21 |
| Pain resource nurse | 0.109 | 4 | 0.123 | 0.09 to 0.15 |
| Concern for patient pain | 0.097 | 5 | 0.095 | 0.06 to 0.12 |
| Hospital grade | 0.094 | 6 | 0.072 | 0.05 to 0.09 |
| Professional title | 0.085 | 7 | 0.044 | −0.01 to 0.07 |
| Gender | 0.072 | 8 | 0.036 | −0.02 to 0.05 |
KSBS, Knowledge Sharing Behaviour Scale.