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. 2010 Jan 20;2010(1):CD003974. doi: 10.1002/14651858.CD003974.pub3

Wilson 1980.

Methods Design: three group parallel trial 
 Purpose: examine the effect of disulfiram and placebo implants on alcoholism
Participants Patients: alcoholics 
 Baseline comparability: NS
Interventions Placebo: implants without disulfiram 
 Untreated: no implants 
 Experimental: implants with disulfiram 
 (Co‐intervention: NS)
Outcomes Number of abstinent drinkers 
 Mean time to first alcoholic consumption
Notes Patients were randomised to placebo and no treatment in a 4:1 ratio
Risk of bias
Bias Authors' judgement Support for judgement
Blinding? 
 Treatment provider Low risk 'Assignment to the disulfiram and placebo conditions was double‐blind'
Blinding? 
 Outcome assessor Unclear risk Not relevant as patient reported outcome
Incomplete outcome data addressed? 
 All outcomes High risk  
Free of selective reporting? Unclear risk No protocol available
Free of other bias? Low risk  
No signs of variance inequality or skewness? Unclear risk Not relevant (binary outcome)
Trial size > 49? Low risk N = 50
Clearly concealed allocation + trial size > 49 + drop‐out max 15% High risk