Which patients do not recover from shoulder impingement syndrome, either with operative treatment or with nonoperative treatment? Subgroup analysis involving 140 patients at 2 and 5 years in a randomized study

摘要

Background and purpose - Shoulder impingement syndrome is common, but treatment is controversial. Arthroscopic acromioplasty is popular even though its efficacy is unknown. In this study, we analyzed stage-II shoulder impingement patients in subgroups to identify those who would benefit from the operation.