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Values for minimally important change (MIC) on the Pain Intensity Numerical Rating Scale (PI-NRS) using both cut-off points in subgroups of patients with acute and chronic low back pain, and with high and low baseline values
| PI-NRSa | Acute LBP chronic LBP | High bascline | Low baseline | |
|---|---|---|---|---|
| N = 300 | N = 135 | |||
| ROC cut-off | 2.5 | 3.5 | 3.5 | 1.5 |
| 95% limit cut-off | 4.5 | 4.7 | 5.4 | 3.2 |
aPI-NRS ranges from 0 points (no pain) to 10 points (very severe pain), ROC = Receiver Operating Characteristic.
