I R Águila-Ledesma1, J L Córdova-Fonseca1, O Medina-Pontaza1, D A Núñez-Gómez1, C Calvache-García1, J M Pérez-Atanasio2, R Torres-González2. 1. Servicio de Artroscopía, Hospital de Traumatología y Ortopedia, Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez», Instituto Mexicano del Seguro Social (IMSS). Colector 15 s/n (Av. Fortuna), Esq. Av. Politécnico Nacional, Col. Magdalena de las Salinas, Del. Gustavo A. Madero, CP 07760, Ciudad de México. México. 2. División de Investigación en Salud, Hospital de Traumatología y Ortopedia, Unidad Médica de Alta Especialidad (UMAE) «Dr. Victorio de la Fuente Narváez», Instituto Mexicano del Seguro Social (IMSS). Colector 15 s/n (Av. Fortuna), Esq. Av. Politécnico Nacional, Col. Magdalena de las Salinas, Del. Gustavo A. Madero, CP 07760, Ciudad de México. México.
Abstract
Pathology related to the rotator cuff remains among the most prevalent musculoskeletal diseases. There is an increasing need for imaging studies (MRI, US, arthroscopy) to test the diagnostic performance of the medical history and physical examination. OBJECTIVE: To prove the diagnostic value of a clinical-radiographic predictive model to find complete ruptures of the rotator cuff. MATERIAL AND METHODS: Descriptive, observational, prospective, transversal and analytical study. Fifty-five patients with preoperative shoulder pain were evaluated with 13 predictive variables: age > 50 years, nocturnal pain, muscle weakness, clinical signs of Neer, Hawkins, Jobe, external rotation lag (ERLS), belly-press, bear hug, and lift-off, radiographic measurement of subacromial space, acromial index and critical shoulder angle. Sensitivity, specificity, and positive and negative predictive values were measured in each variable, comparing the results of each one against the postoperative findings. RESULTS: Of the 55 patients evaluated, 42 had a complete rupture of the rotator cuff in the postoperative period. The eight variables with a higher diagnostic value were selected and a ROC curve was performed, providing an area under the curve of 0.88. CONCLUSIONS: This predictive model uses eight variables (age > 50 years, nocturnal pain, muscle weakness, Jobe, Hawkins, ERLS, subacromial space ≤ 6 mm, and critical shoulder angle > 35°), which together add the predictive value of 0.88 (AUC) to diagnose complete ruptures of the supraspinatus tendon.
Pathology related to the rotator cuff remains among the most prevalent musculoskeletal diseases. There is an increasing need for imaging studies (MRI, US, arthroscopy) to test the diagnostic performance of the medical history and physical examination. OBJECTIVE: To prove the diagnostic value of a clinical-radiographic predictive model to find complete ruptures of the rotator cuff. MATERIAL AND METHODS: Descriptive, observational, prospective, transversal and analytical study. Fifty-five patients with preoperative shoulder pain were evaluated with 13 predictive variables: age > 50 years, nocturnal pain, muscle weakness, clinical signs of Neer, Hawkins, Jobe, external rotation lag (ERLS), belly-press, bear hug, and lift-off, radiographic measurement of subacromial space, acromial index and critical shoulder angle. Sensitivity, specificity, and positive and negative predictive values were measured in each variable, comparing the results of each one against the postoperative findings. RESULTS: Of the 55 patients evaluated, 42 had a complete rupture of the rotator cuff in the postoperative period. The eight variables with a higher diagnostic value were selected and a ROC curve was performed, providing an area under the curve of 0.88. CONCLUSIONS: This predictive model uses eight variables (age > 50 years, nocturnal pain, muscle weakness, Jobe, Hawkins, ERLS, subacromial space ≤ 6 mm, and critical shoulder angle > 35°), which together add the predictive value of 0.88 (AUC) to diagnose complete ruptures of the supraspinatus tendon.