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Table 2 Sample size calculations for detection of reductions in error rate

From: Protocol for evaluation of the cost-effectiveness of ePrescribing systems and candidate prototype for other related health information technologies

Risk ratio Power (%) Sample size (total)
0.6 80 3,210
0.7 80 5,940*
0.8 80 13,888
0.6 90 4,230
0.7 90 7,862
0.8 90 18,456
  1. *Similar to proposed sample in this study.
  2. Sample size calculations for detection of reductions in error rate; baseline error rate 5% and other assumptions, as in Table 1.