Background: Carpal tunnel syndrome is a clinical syndrome manifested by signs and symptoms of irritation of the median nerve at the carpal tunnel in the wrist. Local corticosteroid injection for carpal tunnel syndrome has been studied but its effectiveness is unknown. Objectives: To evaluate the effectiveness of local corticosteroid injection for carpal tunnel syndrome versus placebo injection or other non-surgical interventions. Search methods: We searched the Cochrane Neuromuscular Disease Group Trials register (searched May 2006), MEDLINE (searched January 1966 to May 2006), EMBASE (searched January 1980 to May 2006) and CINAHL (searched January 1982 to May 2006). Selection criteria: Randomized or quasi-randomized studies. Data collection and analysis: Three authors independently selected the trials and rated their overall quality. Relative risks and 95 confidence intervals were calculated for each trial and summary relative risks and 95 confidence intervals were also calculated.
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