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

Levitt 1981.

Methods Design: three group parallel trial 
 Purpose: examine the effect of investigating cardiovascular parameters in cancer patients receiving antiemetic cannabis treatment
Participants Patients: cancer patients receiving nausea inducing chemotherapy 
 Baseline comparability: NS
Interventions Placebo: NS 
 Untreated: no placebo or cannabis 
 Experimental: 
 ‐cannabis (three doses) 
 ‐prochlorperazine 
 (Co‐intervention: yes, chemotherapy)
Outcomes Emetic events 
 Psychological events 
 Heart rate 
 Blood pressure 
 Intraocular pressure
Notes Relevant outcome data not accessible
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk NS
Allocation concealment? Unclear risk NS
Blinding? 
 Treatment provider Unclear risk NS
Blinding? 
 Outcome assessor Unclear risk NS
Incomplete outcome data addressed? 
 All outcomes High risk Drop‐out > 15% or NS
Free of selective reporting? High risk Relevant outcome data not accessible
Free of other bias? Low risk  
Trial size > 49? High risk N = 48
Clearly concealed allocation + trial size > 49 + drop‐out max 15% High risk Trial size < 49