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. 2007 Dec;88(12):1690-3.
doi: 10.1016/j.apmr.2007.07.036.

Subacromial corticosteroid injection for poststroke shoulder pain: a retrospective chart review

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Subacromial corticosteroid injection for poststroke shoulder pain: a retrospective chart review

John Chae et al. Arch Phys Med Rehabil. 2007 Dec.

Abstract

Objective: To assess the effectiveness of subacromial corticosteroid injections for the treatment of poststroke shoulder pain.

Design: Retrospective chart review.

Setting: Ambulatory setting, university-affiliated hospital.

Participants: People (N=60) with stroke-associated hemiparesis and pain in the involved shoulder.

Interventions: Electronic medical records of stroke survivors with shoulder pain in the hemiparetic limb treated with a subacromial corticosteroid injection by a practitioner between January 1, 2005, and June 30, 2007, were reviewed. Patients who had a documented preinjection pain score on the day of injection by using a 0 to 10 numeric rating scale and a postinjection pain score within 16 weeks of injection were included.

Main outcome measures: Pre- and postinjection scores were compared by using the paired t test. Treatment success was defined as a minimum of 2-point absolute or 30% relative pain reduction. Linear and logistic regression analyses were used to identify predictors of pain reduction and treatment success, respectively.

Results: Patients experienced an absolute pain reduction of 2.6+/-3.7 (95% confidence interval, 1.7-3.6; P<.001) and a relative pain reduction of 32.9%+/-53.6%. Fifty-three percent experienced the minimum 2-point absolute pain reduction, whereas 45% experienced the minimum 30% relative pain reduction. Linear regression analyses identified the preinjection pain score as a predictor of absolute pain reduction and concomitant outpatient occupational or physical therapy as a predictor of both absolute and relative pain reduction. No other factors were predictive of pain reduction or treatment success.

Conclusions: Subacromial corticosteroid injection is associated with a significant reduction in poststroke shoulder pain. However, controlled trials are needed to show a cause-and-effect relationship and rule out spontaneous recovery, placebo effect, and other confounds.

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