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Table 2 Quality ratings and risk of bias

From: A systematic review and narrative synthesis of group self-management interventions for adults with epilepsy

Study Quality appraisal Risk of bias appraisal
Trial design Participants Intervention Outcomes Total (max 8) Sequence generation Risk of bias Allocation concealment Risk of bias
Aliasgharpour et al. [33] 1 1.75 2 2 6.75 Random number table Low Not described Unclear
Au et al. [37] 0.75 2 2 2 6.75 Matched design Unclear Not described Unclear
Fraser et al. [35] 1.75 2 1.75 2 7.5 Random number generator Low Not described Unclear
Helde et al. [29] 1.25 2 2 2 7.25 Computer-generated block randomisation Low Research assistant blinded Low
Ibinda et al. [34] 1.25 1.25 0.5 1.5 4.5 Computer-generated randomisation Low Not described Unclear
Losada-Camacho et al. [28] 2 2 1.75 2 7.75 Drawing of ballot papers Low Sequentially numbered, opaque, sealed envelopes Low
Lundgren et al. [30] 1 2 2 2 7 Computer-generated randomisation Low Not described Unclear
May and Pfafflin. [15] 1.25 2 0.75 1.5 5.5 Not described Unclear Not described Unclear
McLaughlin and McFarland [32] 1 1.75 2 2 6.75 Computer-generated randomisation Low Not described Unclear
Olley et al. [36] 1.5 2 1.25 1.75 6.5 Alternate clinic visit High Not described Unclear
Pramuka et al. [31] 1.5 2 2 2 7.5 Random number table Low Consecutively numbered, sealed envelopes Low