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GSR feedback and Schultz relaxation in tension headaches: a comparative study
Collet L, Cottraux J, Juenet C
Pain 1986 May;25(2):205-213
clinical trial
5/10 [Eligibility criteria: No; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: Yes; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*

A comparative study of the use of GSR feedback (n = 16) and Schultz relaxation (n = 15) with patients presenting tension headaches showed that there was no significant improvement in the group treated by relaxation at the end of the treatment whereas the group treated by GSR feedback showed significant improvements with respect to frequency and intensity of headaches and to anxiety as measured by subjects' self-evaluation (p < 0.05). Intergroup comparison demonstrated a greater improvement in headache intensity for the GSR feedback group than for the relaxation group (p < 0.05) at the post-treatment stage. Likewise, the percentage of patients showing at least 50% improvement as to headache frequency was significantly higher (p < 0.05) in the GSR feedback than in the relaxation group. High pre-treatment EMG and high pre-treatment weekly pain level indicate a good prognosis of improvement with respect to post-treatment headache frequency and intensity respectively in the case of the GSR feedback group. We found no prognostic factor for post-treatment clinical improvement in the relaxation group.

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