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Benefit Increase

OUTCOME MEASURE (EVENT) GROUP Yes expected No expected Total Experimental 120 105.00 770 785.00 1780 Control 90 105.00 800 785.00 1780 Total 210 210.00 1570 1,570.00 3560 Hypothesis testing (Chi-squared test)   χ2= 4.286 p =

Best estimate 95% CI   EEO (odd) 0.156   0.117   0.208   CEO (odd) 0.113   0.084   0.150   EER (rate) 0.067   0.057   0.080   CER (rate) 0.051   0.041   0.062   RRI 0.333   0.724   0.031   ARI 0.017   0.001   0.032   NNT (benefit) 59   31   741           ODDS Ratio 1.385   1.036   1.853   Risk Ratio 1.333   1.031   1.724                 NNT for 1 year 59   31   31   NNT for 2 year 30   16   371