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

Block 1980.

Methods Design: three group parallel trial 
 Purpose: examine the effect of rational emotive therapy on obese persons
Participants Patients: overweight adults 
 Baseline comparability: yes (weight)
Interventions Placebo: sessions of deep muscle relaxation & discussions 
 Untreated: no sessions 
 Experimental: sessions with rational emotive therapy 
 (Co‐intervention: information booklet on nutrition)
Outcomes Overweight (pounds)
Notes  
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk NS
Allocation concealment? Unclear risk NS
Blinding? 
 Treatment provider High risk Not described as double‐blind (placebo/rational emotive therapy)
Blinding? 
 Outcome assessor Unclear risk NS
Incomplete outcome data addressed? 
 All outcomes High risk Drop‐out > 15% or NS
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 (not naturally positive continuous outcomes e.g. change)
Trial size > 49? High risk N = 24
Clearly concealed allocation + trial size > 49 + drop‐out max 15% High risk Trial size < 49