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Low level laser therapy: a prospective double blind trial of its use in an orthopaedic population
Mulcahy D, McCormack D, McElwain J, Wagstaff S, Conroy C
Injury 1995 Jun;26(5):315-317
clinical trial
6/10 [Eligibility criteria: No; Random allocation: No; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: Yes; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: No; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

We have conducted a prospective, double blind trial of law level laser therapy (LLLT) in musculoskeletal injuries to assess its efficacy. We assigned patients with a variety of painful skeletal soft tissue conditions to one of two treatment groups, treatment from a functional machine, placebo treatment from an inactive machine. Both machines were identical and both appeared functional. The operative status of each machine was unknown to both the therapist and the patient. The results suggest that LLLT has no significant therapeutic effect and acts primarily as a placebo.
With permission from Excerpta Medica Inc.

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