Methodological Quality Analysis of Systematic Review for the Treatment of Rotator Cuff Disease.

To evaluate the methodological quality of systematic reviews for the surgical and nonsurgical treatment of individuals with rotator cuff syndrome; to compare, through the (AMSTAR) instrument, the quality of studies found in the Cochrane Library, PubMed (Publisher ), EMBASE andQinsightdatabases.  This is a descriptive and comparative cross-sectional study, in which two independent authors analyzed, through the AMSTAR instrument, the methodological quality of Cochrane and non-Cochrane systematic reviews on the treatment of individuals diagnosed with rotator cuff syndrome.  A total of 76 systematic reviews were evaluated by the AMSTAR instrument. The overall mean score was 6.1 (±2.1) and the mean per database was 9.1 (±0.9) for the Cochrane reviews and 5.7 (±1.8) for the non-Cochrane reviews. The lowest-scoring item of AMSTAR was 11, related to the display of the conflict of interests of the publication. In a comparative analysis of the final variable score, there was a statistical difference between the Cochrane and non-Cochrane studies.  According to the present study, systematic reviews using the Cochrane methodology have a better methodological quality compared to non-Cochrane studies on the treatment of rotator cuff dysfunctions.