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. 2011 Apr 13;2011(4):CD001333. doi: 10.1002/14651858.CD001333.pub4

Ladewig 1990.

Methods randomised, controlled trial 
 not blind
Participants 20 detoxified opioid addicts male and female; age range: 20‐35 years; opioid free for at least 10 days;
Interventions naltrexone plus psychotherapy (15) versus psychotherapy alone (5); outpatients. 
 naltrexone: induction: 50 mg/day for three weeks; then Monday 100 mg, Wednesday 100 mg, Friday 150 mg. 
 Psychotherapy: daily group therapy plus weekly individual therapy 
 study duration: information not reported (duration of treatment of patients: min 34 max 124 days)
Outcomes use of substance af abuse measured by urine analysis 
 adverse effects
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk information not reported
Allocation concealment? Unclear risk information not reported
Blinding? 
 objective outcomes Low risk open label trial, but the outcomes are unlikely to be influenced by lack of blinding
Blinding? 
 subjective outcomes High risk open label
Incomplete outcome data addressed? 
 All outcomes High risk results reported for 14 of 15 patients in the intervention group and for 3 of 5 in the control group.. Information not given on the patients lost