Fig 2From: Serious adverse events reported in placebo randomised controlled trials of oral naltrexone: a systematic review and meta-analysisForest plot of risk ratio (RR) of serious adverse events in RCTs of naltrexone vs placebo. Data in parentheses show the mean or range of participants’ age and the percentage of male or female participants. Double zero studies (i.e. those which reported zero events in each treatment group) were excluded from the meta-analysis. This also applies for all the subgroup analyses (for dose, disease and time)Back to article page