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Table 4 Data synthesis rules for each measurement property

From: Measuring carer quality of life in Duchenne muscular dystrophy: a systematic review of the reliability and validity of self-report instruments using COSMIN

Criteria Synthesised rating
All ratings are+/−/±/? +/−/±/?
At least one rating is + and one rating is − ±
aDevelopment paper is ±, reviewer rating is+/− +/−
Only one rating is ? Ignore ? and rate as above
Two or more ratings are ? ?
All other situations ±
  1. aContent validity synthesis only