Table 2.
Mean PROMIS T-scores of the baseline and follow-up visits and ICC for test-retest reliability.
| Baseline (Test) | Follow-up (Re-Test) | Mean Difference (95% CI) | ICC (95% CI) | |||
|---|---|---|---|---|---|---|
| n | Mean T-Score (SD) | n | Mean T-Score (SD) | |||
| PROMIS Instruments | ||||||
| Physical Function | 272 | 41.7 (9.2) | 159 | 41.4 (9.0) | −0.3 (−2.1, 1.5) | 0.97 (0.96, 0.98) |
| Pain Interference | 279 | 53.6 (9.9) | 164 | 53.3 (9.7) | −0.3 (−2.2, 1.6) | 0.93 (0.91, 0.95) |
| Fatigue | 275 | 54.7 (10.2) | 162 | 53.2 (10.3) | −1.5 (−3.5, 0.4) | 0.94 (0.91, 0.95) |
| Anchor | ||||||
| Pain NRS | 271 | 3.0 (2.6) | 159 | 3.0 (2.6) | −0.1 (−0.6, 0.4) | 0.95 (0.93, 0.96) |
SD: Standard Deviation, CI: Confidence interval, ICC: Intraclass Correlation Coefficient, NRS: Pain Numeric Rating Scale.