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relative benefit increase (RBI)

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Absolute Benefit Increase (ABI)

  • this measure is used when the treatment is likely to increase the number of beneficial events
  • calculated as EER-CER (expressed as a percentage)

Relative Benefit Increase (RBI)

  • ABI/CER

Key:

  • Experimental Event Rate (EER) - This is the event rate in the group given active treatment - this is expressed as a percentage. It is calculated as the number of events number by the number of patients receiving active treatment
  • Control Event Rate (CER) - This is the event rate in the group given active placebo - this is expressed as a percentage. It is calculated as the number of events number by the number of patients receiving placebo.

Reference:

  1. Doctor (March 22nd 2005). Ready Reckoner.

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