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Table 3 Relative risk estimates of any cannabis use prior to injury and dose response estimates

From: Alcohol and cannabis use as risk factors for injury – a case-crossover analysis in a Swiss hospital emergency department

  RR 95% CI lower 95% CI upper
cannabis use    
   no 1   
   yes 0.33 0.12 0.92
dose response    
   no use 1   
   less than 1 pipe or joint 1.45 0.34 6.23
   1 pipe or joint 0.11 0.01 0.89
   more than 1 pipe or joint 0.03 0.00 0.44
  1. There were no women using cannabis in the 6 hours prior to injury and only 3 women a week ago. Therefore, only results for the total sample were reported