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Table 4 Methodological quality of studies with guided imagery/hypnosis in FMS

From: Efficacy of hypnosis/guided imagery in fibromyalgia syndrome - a systematic review and meta-analysis of controlled trials

Author (Reference) Alvarez[23] Castel[24] Grøndhal[25] Haa-nen[26] Men-ziers[27] Rucco[28]
Sample criteria Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1) Inadequate (0)
Evidence that sample criteria were met Adequate (1) Adequate (1) Inadequate (0) Adequate (1) Adequate (1) Inadequate (0)
Report of attrition Adequate (2) Partial (1) Adequate (2) Adequate (2) Adequate (2) Partial (1)
Rates of attrition Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1)
Sample characteristics Adequate (1) Adequate (1) Inadequate (0) Adequate (1) Adequate (1) Adequate (1)
Group equivalence Adequate (1) Inadequate (0) Inadequate (0) Adequate (1) Adequate (1) Adequate (1)
Adequacy of randomisation Adequate (2)* Inadequate (0) Adequate (2)* Inadequate (0) Inadequate (0) Inadequate (0)
Concelament of treatment allocation Adequate (1)* Inadequate (0) Adequate (1)* Inadequate (0) Inadequate (0) Inadequate (0)
Blinding of assessor Adequate (1)* Inadequate (0) Adequate (1)* Inadequate (0) Inadequate (0) Inadequate (0)
Treat-ment expectations Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0)
Justifications of outcomes Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1)
Validity of outcomes for context Adequate (2) Adequate (2) Adequate (2) Adequate (2) Adequate (2) Adequate (2)
Reliability and sensitivity to change of outcomes Adequate (2) Adequate (2) Adequate (2) Adequate (2) Adequate (2) Adequate (2)
Follow up of at least 6 months Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0)
Power calculation Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0) Inadequate (0)
Sufficient sample size Inadequate (0) Adequate (1) Inadequate (0) Adequate (1) Adequate (1) Adequate (1)
Adequate data analysis Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1) Adequate (1)
Adequate reporting of summary statistics Adequate (1) Adequate (1) Adequate (1)* Adequate (1) Adequate (1) Inadequate (0)
Intention to treat analysis Inadequate (0) Inadequate (0) Inadequate (0) Adequate (1) Inadequate (0) Inadequate (0)
Control group Adequate (2) Adequate (2) Adequate (2) Adequate (2) Adequate (2) Inadequate (0)
Sum 20 14 17 17 16 10
  1. * Data provided on request