“…[91] Factors that were reported to predict a poor outcome at 3 months were severe pain at first presentation, a prior episode, a severe restriction of the passive abduction range, concomitant neck pain, cervical spondylosis and radicular symptoms, higher age, involvement of the dominant side and sick leave from work. The reported evidence for these factors is weak and, according to the reviewers, is based on studies with weak methodology.…”