Smokers Achieved Minimal Clinically Important Difference for Visual Analog Scale and American Shoulder and Elbow Surgeons Scores at a Lower Rate Than Nonsmokers Even When Repaired Supraspinatus Tendons Were Intact on Postoperative Magnetic Resonance Imaging
W P Yau M.B.B.S., F.R.C.S.Ed., F.R.C.S.Ed. (Ortho.), F.H.K.C.O.S., F.H.K.A.M. (Orthopaedic Surgery)
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Abstract
Purpose
To investigate the impact of smoking on clinical outcomes after repair of supraspinatus tendon in patients who had an intact repair found on postoperative magnetic resonance imaging.
Methods
Patients who received primary complete repair of supraspinatus tendon tear between 2014 and 2020 were retrospectively identified. Patients were excluded if a postoperative magnetic resonance imaging scan was not available or if the follow-up was less than 2 years. Visual analog score (VAS), American Shoulder and Elbow Surgeons (ASES) score, and active forward flexion were assessed at the 2-year follow-up. The percentage of patients acquiring minimal clinically important difference (MCID) was reported.
Results
One hundred primary supraspinatus tendon repairs were included. The healing rate was 77% in smokers and 90% in nonsmokers. Smoking was the independent predictor of a poorer 2-year VAS (P < .001) and ASES (P < .001) scores. Significant improvement in clinical outcomes was observed between preoperation and the 2-year follow-up, regardless of the integrity of the repair or smoking status (P < .001). When the repaired tendon was intact, nonsmokers had a greater chance of achieving MCID in 2-year VAS and ASES scores than smokers. Ninety-nine percent of nonsmokers, compared with 82% of smokers, achieved MCID in VAS at the 2-year follow-up (P = .023). The corresponding figures for ASES were 98% and 71%, respectively (P = .004).
Conclusions
In this study, smoking was associated with poorer clinical outcomes, including a greater 2-year VAS pain score and a lower 2-year ASES score, when compared with nonsmokers, even in cases in which there was no full-thickness retear of the repaired supraspinatus tendon.
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