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Table 2 Assessment of the methodological quality of the randomized controlled trials

From: Intravenous immunoglobulin for postpolio syndrome: a systematic review and meta-analysis

Study [year] Country Allocation generation Allocation concealment Blinding Data analysis Loss to follow-up Selective reporting Other bias
Bertolasi [2013] [14] Italy Unclear Unclear Blinded patients and assessors ITT 0 Low risk Low risk
Farbu [2007] [12] Norway Notes drawn Adequate Blinded patients and assessors ITT 0 Low risk Intergroup differences in baseline assessments of muscle strength
Gonzalez [2006] [10] Sweden Computer generated Adequate Blinded caregivers, patients, and assessors PP 4.9% Low risk Affected muscles were assessed for both primary and secondary outcomes
  1. The risk of bias was assessed according to the methods recommended by the Cochrane Collaboration.
  2. ITT, Intention-to-treat; PP, Per-protocol.