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Harm Reduction

INPUT TABLE
  Patients in the experimental group
  Patients in the control group
  Total number enrolled 2000
  Events in the experimental group
  Events among controls
  Experimental mean follow-up (months)
  Control mean follow-up (months)
 
 
OUTCOME MEASURE (EVENT)
GROUP Yes expected No expected Total
Experimental 7 43.50 993 956.50 2000
Control 80 43.50 920 956.50 2000
Total 87 87.00 1913 1,913.00 4000
Hypothesis testing (Chi-squared test)
  χ2= 61.253 =  
 
  Best
estimate
95% CI
  EEO (odd) 0.007   0.003   0.015
  CEO (odd) 0.087   0.040   0.189
  EER (rate) 0.004   0.002   0.007
  CER (rate) 0.040   0.032   0.050
  RRR 0.913   0.811   0.959
  ARR 0.037   0.028   0.046
  NNT (benefit) 27   22   36
             
  ODDS Ratio 0.081   0.037   0.176
  Risk Ratio 0.088   0.041   0.189
             
  NNT for 1 year 27   22   36
  NNT for 2 year 14   11   18