| B) Subgroups Cut-off values | Sensitivity % | Specificity % | Negative LR | Positive LR |
| RSI ≥19 | 80 | 93 | 0.22 | 11.43 |
| RPI-SSE ≥8 | 80 | 73 | 0.27 | 2.96 |
| RPI-SS ≥9 | 100 | 67 | 0.00 | 3.03 |
| RPI-SP ≥6 | 100 | 50 | 0.00 | 2.00 |
| RPI-SMC ≥9 | 80 | 70 | 0.29 | 2.67 |
Negative/positive likelihood ratio of 0.2–0.5/2–5=small difference, relevant for clinical decision making; 0.1–0.2/5–10=moderate difference, substantial for clinical decision making; <0.1/>10=clinical important difference, highest test quality. Due to small sample sizes, cut-offs for only one group was calculated.
Calculations based on CPG Scale Characteristic Pain Intensity (CPI), n=51.
CPG, Chronic Pain Grade questionnaire; RSI—Risk Stratification Index; RPI, Risk Prevention Index—Social; RPI-SP, pain experience; RPI-SS, distress; RPI-SSE, social environment; RPI-SMC,medical environment