Item selection for the MTSS score
| Theoretical domain | Item | Test–retest reliability | Responsiveness analysis* | ||
|---|---|---|---|---|---|
| ICC (95% CI) | β-coefficient | R2 | p Value | ||
| Limitation in sporting activities | |||||
| Current sporting activities | 0.80 (0.67 to 0.88) | −0.43 | 0.065 | 0.04 | |
| Current amount of sporting activities | 0.76 (0.61 to 0.86) | −0.03 | 0.001 | 0.78 | |
| Current content of sporting activities | 0.84 (0.73 to 0.91) | −0.38 | 0.114 | <0.01 | |
| Pain while performing sporting activities | |||||
| Pain while performing sporting activities | 0.63 (0.43 to 0.78) | −0.45 | 0.129 | <0.01 | |
| Time to onset of pain during sporting activities | 0.72 (0.56 to 0.84) | −0.44 | 0.201 | <0.01 | |
| Pain throughout sporting activities 1 | 0.44 (0.19 to 0.65) | −0.11 | 0.018 | 0.31 | |
| Pain throughout sporting activities 2 | 0.34 (0.07 to 0.57) | −0.15 | 0.031 | 0.18 | |
| Pain after sporting activities | 0.74 (0.58 to 0.85) | −0.20 | 0.048 | 0.09 | |
| Pain while performing activities of daily life | |||||
| Pain while standing | 0.72 (0.55 to 0.84) | −0.55 | 0.098 | 0.01 | |
| Pain while walking | 0.82 (0.70 to 0.90) | −0.50 | 0.089 | 0.02 | |
| Pain while walking up or downstairs | 0.86 (0.76 to 0.92) | −0.18 | 0.008 | 0.48 | |
| Pain while performing common daily activities | 0.48 (0.23 to 0.67) | −0.52 | 0.107 | <0.01 | |
| Pain at rest | |||||
| Pain at rest | 0.60 (0.39 to 0.76) | −0.21 | 0.019 | 0.28 | |
| Pain at night | 0.91 (0.85 to 0.95) | 0.22 | 0.023 | 0.22 | |
| Pain to touch | 0.50 (0.26 to 0.69) | −0.19 | 0.059 | 0.06 | |
Items in italics were selected for use in the MTSS score.
*As assessed with linear regression analysis. β indicates how the GPE scale changes for each extra unit of the item; R2 represents the magnitude of the relation between the GPE scale and each item.
ADL, activities of daily living; GPE, global perceived effect; ICC, intraclass correlation coefficient; MTSS, medial tibial stress syndrome.