Outcome | Extremity | Age category | Number of items | Summary score | Non-inferiority margin (MCID) |
Satisfaction with treatment | Either | All participants | 1 item; 0–100 VAS | Rating scale (0–10*) | −0.7 points |
Functional outcome | |||||
No questionnaire | Either | 0–3 | |||
PROMIS UE SF | Upper | 4–17 | 8 items; 5P Likert | T-score | Not available |
PROMIS Mobility SF | Lower | 4–17 | 8 items; 5P Likert | T-score | −3.0 points |
QuickDASH | Upper | ≥18 | 11 items; 5P Likert | Total (100–0*) | +15.91 points |
LEFS | Lower | ≥18 | 20 items; 5P Likert | Total (0–80*) | −9.0 points |
Health-related QoL | |||||
No questionnaire | Either | 0–3 | |||
EQ-5D-Youth | Either | 4–11, and 12–17 (if proxy) | 5 items; 3 levels, 1 item; 0–100 VAS | Index (0–1*) VAS score (0–100*) | |
EQ-5D-5L | Either | ≥18, and 12–17 (self-complete) | 5 items; 3 levels, 1 item; 0–100 VAS | Index (0–1*) VAS score (0–100*) |
Summary scores were calculated using the guideline of each corresponding questionnaire. Normative Dutch values of the EQ-5D-5L were used to calculate the EQ-5D-5L index scores, and normative values of the EQ-5D-3L were used to calculate the EQ-5D-Youth index scores.
T-score: 50 points equal to mean score of the reference population and −10 equal to the mean score of −1 SD compared with reference.
*Indicates best outcome score.
EQ-5D-3L, EuroQol-5-dimension 3-level questionnaire; EQ-5D-5L, EuroQol-5-dimension 5-level questionnaire; 5L, 5-level; LEFS, Lower Extremity Functional Scale; MCID, minimal clinically important difference; 5P, 5-point; PROMIS, Patient-Reported Outcomes Measurement Information System; QoL, quality of life; QuickDASH, Shortened Version of the Disabilities of the Arm, Shoulder and Hand; SF, Short Form; UE, upper extremity; VAS, Visual Analog Scale.