BACKGROUND & OBJECTIVE
Psychological factors have been shown to influence outcomes for many different musculoskeletal problems, including shoulder pain. But the role of psychological factors in shoulder pain has not been systematically reviewed. This study examined the predictive, moderating and mediating role of cognitive, emotional and behavioral factors on pain and disability following treatment for shoulder pain.
The researchers identified 21 eligible studies involving shoulder pain treatment and measurement of psychological variables, including anxiety, depression, distress, somatization, coping, self-efficacy, expectation of recovery, optimism, fear-avoidance beliefs, and pain catastrophizing. The studies involved different treatment methods, including physiotherapy, surgery, or conservative medical care. Because of study heterogeneity, a meta-analysis was not possible. Therefore, the researchers performed a best-evidence synthesis.
9 studies had a low risk of bias, 11 had a moderate risk of bias, and three had a high risk of bias.