Table 2

Different questionnaires used to assess satisfaction, functional outcome, and quality of life

OutcomeExtremityAge categoryNumber of itemsSummary scoreNon-inferiority margin (MCID)
Satisfaction with treatmentEitherAll participants1 item; 0–100 VASRating scale (0–10*)−0.7 points
Functional outcome
 No questionnaireEither0–3
 PROMIS UE SFUpper4–178 items; 5P LikertT-scoreNot available
 PROMIS Mobility SFLower4–178 items; 5P LikertT-score−3.0 points
 QuickDASHUpper≥1811 items; 5P LikertTotal (100–0*)+15.91 points
 LEFSLower≥1820 items; 5P LikertTotal (0–80*)−9.0 points
Health-related QoL
 No questionnaireEither0–3
 EQ-5D-YouthEither4–11, and 12–17 (if proxy)5 items; 3 levels,
1 item; 0–100 VAS
Index (0–1*)
VAS score (0–100*)
 EQ-5D-5LEither≥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.