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. 2011 Feb 3;342:d195. doi: 10.1136/bmj.d195

Table 7.

 Analysis of prescribing errors before (epoch 1) and after (epoch 2) phase one of Safer Patients Initiative (SPI1)

Control hospitals SPI1 hospitals
Epoch 1 Epoch 2* Epoch 1 Epoch 2*
No of patients† 233 239 381 378
No of prescriptions 5482 6207 10664 11538
Prescriptions per patient 23.5 26.0 28.0 30.5
Total No of errors 596 564 1157 1530
Error rate (SE)‡ 0.14 (0.02) 0.11 (0.01) 0.15 (0.02) 0.15 (0.01)

*After intervention.

†With medication charts available for review.

‡Adjusted for date of review.