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Accuracy of the rotator cuff reparability score
Authors:Niti Prasathaporn  Vanasiri Kuptniratsaikul  Napatpong Thamrongskulsiri  Thun Itthipanichpong
Affiliation:Niti Prasathaporn, Department of Orthopaedics, Ramkhamhaeng Hospital, Bangkok 10240, ThailandVanasiri Kuptniratsaikul, Napatpong Thamrongskulsiri, Thun Itthipanichpong, Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Bangkok 10330, ThailandNapatpong Thamrongskulsiri, Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
Abstract:BACKGROUNDThe reparability of large or massive rotator cuff tears is difficult to determine pre-operatively. We previously identified age ≥ 65 years, acromiohumeral interval ≤ 6 mm, and anteroposterior tear size ≥ 22 mm as risk factors for rotator cuff repair failure. We therefore developed a rotator cuff reparability score where each of the above risk factors is assigned a score of one point. AIMTo determine the accuracy of a rotator cuff reparability score.METHODSThis was a retrospective cohort study of recruited patients with large or massive rotator cuff tears treated at our institution between January 2013 and December 2019. Exclusion criteria were revision surgery and patients with contraindications for surgery. All patients underwent arthroscopic rotator cuff repair and were categorized into either complete or partial rotator cuff repair. Rotator cuff reparability scores were calculated for each patient. The sensitivity, specificity, positive and negative predictive value, and positive and negative likelihood ratio were assessed. A receiver operating characteristic curve was plotted to determine the optimal cut-off rotator cuff reparability score. RESULTSEighty patients (mean age, 61 years; range, 25–84 years; 41 females and 39 males) were recruited. Intra- and inter-observer reliabilities were good to excellent. The number of patients with 0, 1, 2, and 3 risk factors for rotator cuff repair failure were 24, 33, 17, and 6, respectively. Complete repair was performed in all patients without risk factors. Two of the 33 patients with one risk factor and seven of the 17 patients with two risk factors underwent partial repair. One of the six patients with three risk factors underwent complete repair. The area under the curve was 0.894. The optimal cut-off score was two points with a sensitivity of 85.71% and a specificity of 83.33%. CONCLUSIONA rotator cuff reparability score of two was determined to be the optimal cut-off score for predicting the reparability of large or massive rotator cuff tears.
Keywords:Rotator cuff tear   Reparability   Prognostic factors   Rotator cuff reparability score
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