![Sample our Medicine, Dentistry, Nursing & Allied Health journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/5944/TOC-Subject-Sample-2021-Medicine-Dentistry-Nursing-Allied-Health.jpg"})
Abstract
Background and purpose — Epidemiological studies of full-thickness rotator cuff tears (FTRCTs) have mainly investigated degenerative lesions. We estimated the population-based incidence of acute FTRCT using a new diagnostic model.
Patients and methods — During the period November 2010 through October 2012, we prospectively studied all patients aged 18–75 years with acute onset of pain after shoulder trauma, with limited active abduction, and with normal conventional radiographs. 259 consecutive patients met these inclusion criteria. The patients had a median age of 51 (18–75) years. 65% were males. The patients were divided into 3 groups according to the clinical findings: group I, suspected FTRCT; group II, other specific diagnoses; and group III, sprain. Semi-acute MRI was performed in all patients in group I and in patients in group III who did not recover functionally.
Results — We identified 60 patients with FTRCTs. The estimated annual incidence of MRI-verified acute FTRCT was 16 (95% CI: 11–23) per 105 inhabitants for the population aged 18–75 years and 25 (CI: 18–36) per 105 inhabitants for the population aged 40–75 years. The prevalence of acute FTRCT in the study group was 60/259 (23%, CI: 18–28). The tears were usually large and affected more than 1 tendon in 36 of these 60 patients. The subscapularis was involved in 38 of the 60 patients.
Interpretation — Acute FTRCTs are common shoulder injuries, especially in men. They are usually large and often involve the subscapularis tendon.
KEA participated in the design of the study, prepared databases, carried out the calculations, and wrote the first draft. FA contributed to the statistical analysis and revision of the manuscript. KL supervised the study, participated in the design, and helped to draft the manuscript. All the authors read and approved the final version of the manuscript.
We thank physiotherapists Madelaine Andersson and Anna Lönnberg for performing physical examinations and monitoring the study, and Torsten Boegård for MRI reviews and radiological advice. The study was supported by grants from the Stig and Ragna Gorthon Research Foundation and the Thelma Zoega Foundation.
No competing interests declared.
