Table 3.
Interval subjective outcome changes for measures with established MCID values
| Pre-op to 6 weeks | 6 weeks to 3 months | 6 weeks to 6 months | 3 months to 6 months | 3 months to 1 year | 6 months to 1 year | 6 months to 2 years | 1 year to 2 years | |
|---|---|---|---|---|---|---|---|---|
| Rowe (MCID 9.7; n = 201) | ||||||||
| Significant clinical improvement?a | Yes | No | Yes | No | Yes | No | No | No |
| ΔMean | 20.60 | 10.48 | 20.69 | 10.21 | 10.78 | 0.56 | 2.40 | 1.83 |
| P value | < .001 | 0.10 | < .001 | .14 | .001 | > .999 | > .999 | > .999 |
| WOSI (MCID 10.5; n = 385) | ||||||||
| Significant clinical improvement?a | No | Yes | Yes | Yes | Yes | No | No | No |
| ΔMean | 7.48 | 14.51 | 27.02 | 12.51 | 15.95 | 3.43 | 5.61 | 2.18 |
| P value | > .999 | < .001 | < .001 | < .001 | < .001 | > .999 | > .999 | > .999 |
| OSIS (MCID 6.0; n = 77) | ||||||||
| Significant clinical improvement?a | No | No | Yes | Yes | Yes | No | Yes | No |
| ΔMean | − 8.54 | 7.20 | 19.31 | 12.11 | 17.00 | 4.89 | 6.38 | 1.49 |
| P value | > .999 | 0.20 | < .001 | < .001 | < .001 | .86 | < .001 | > .999 |
| ASES (MCID 6.4; n = 327) | ||||||||
| Significant clinical improvement?a | No | – | – | Yes | Yes | No | No | No |
| ΔMean | 5.70b | – | – | 11.05 | 15.37 | 4.32 | 2.83 | − 1.49 |
| P value | .97 | – | – | < .001 | < .001 | > .999 | > .999 | > .999 |
| Constant (MCID 10; n = 155) | ||||||||
| Significant clinical improvement?a | Yes | – | – | – | – | No | No | No |
| ΔMean | 13.02c | – | – | – | – | 6.60 | 6.90 | 0.30 |
| P value | < .001 | – | – | – | – | > .999 | > .999 | > .999 |
| SST (MCID 2.2, n = 34) | ||||||||
| Significant clinical improvement?a | No | – | Yes | – | – | Yes | No | No |
| ΔMean | − 0.81 | – | 4.05 | – | – | 0.28 | − 0.32 | − 0.60 |
| P value | > .999 | – | < .001 | – | – | < .001 | > .999 | > .999 |
| DASH (MCID 10.2, n = 24) | ||||||||
| Significant clinical improvement?a | No | – | – | – | – | – | No | – |
| ΔMean | − 14.00d | – | – | – | – | – | − 11.00 | – |
| P value | > .999 | – | – | – | – | – | > .999 | – |
Dashes indicate intervals for which ΔMean could not be calculated due to unavailability of data at either time point. Italicized text indicates that the later bound of this time interval is the time of maximal medical improvement (MMI)
WOSI Western Ontario Shoulder Instability Index, OSIS Oxford Shoulder Instability Score, ASES American Shoulder and Elbow Surgeon Score, SST Simple Shoulder Test, DASH Disabilities of the Arm, Shoulder, and Hand, MCID minimal clinically important difference, n summed pre-operative enrollment for all studies reporting respective measure
aP < .05 utilized for all statistical comparisons
bThree-month data utilized in place of 6-week data. (Three-month data was the earliest available for ASES.)
cSix-month data utilized in place of 6-week data. (Six-month data was the earliest available for Constant or DASH.)