Establishing minimal clinically important difference, substantial clinical benefit, and patient acceptable symptomatic state after biceps tenodesis.

BACKGROUND: The purposes of this study were to establish thresholds for improvement in patient-reported outcome scores that signify the minimal clinically important difference (MCID), substantial clinical benefit (SCB), and patient acceptable symptomatic state (PASS) after biceps tenodesis (BT) and to assess patient variables that are associated with these clinically important outcomes.
METHODS: A prospectively maintained institutional shoulder registry was queried for patients undergoing isolated BT between 2014 and 2017. Anchor-based and distribution-based approaches were used to calculate the MCID whereas an anchor-based method was used to calculate the SCB and PASS for the Constant-Murley score, Single Assessment Numerical Evaluation (SANE) score, and American Shoulder and Elbow Surgeons score.
RESULTS: A total of 123 patients who underwent isolated BT were included for analysis. The MCID, SCB, and PASS calculated for the American Shoulder and Elbow Surgeons score were 11.0, 16.8, and 59.6, respectively. For the Constant-Murley score, the calculated MCID and PASS were 3.8 and 19.5, respectively. The MCID, SCB, and PASS calculated for the SANE score were 3.5, 5.8, and 65.5, respectively. The following patient variables were significantly associated with decreased odds of achieving the MCID: workers' compensation status, male sex, and higher preoperative SANE score. Patients with a history of ipsilateral shoulder surgery had significantly reduced odds of achieving SCB. The only factor significantly associated with failing to reach the PASS was workers' compensation status.
CONCLUSION: This study established values for the MCID, SCB, and PASS after BT without concomitant rotator cuff repair. Workers' compensation status, previous shoulder surgery, male sex, and higher preoperative patient-reported outcome measure scores are associated with lower odds of achieving clinically significant improvement after BT.