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Table 1 Estimated 28 day mortality rates for power calculation

From: Steroids or pentoxifylline for alcoholic hepatitis (STOPAH): study protocol for a randomised controlled trial

   Yes No Total
Prednisolone Yes 17%a Group D 25% Group B 21%
No 25% Group C 35% Group A 30%
  Total 21% 30%  
  1. aEstimated assuming no interaction, that is multiplicative independent effects.