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Table 3 Classification systems for adverse events, with prevalence figures (proportion of total adverse events in given category)

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

Forster et al. [27] Brennan et al. [17] Hoonhout et al. [28] Yao et al. [14]
Event category Proportion in category Event category Proportion in category Event category Proportion in category Event category Proportion in category
Death 0 Death 0.136 Death 0.078 Death 0.05
Permanent disability 0.03 Permanent impairment, >50% disability 0.026 Permanent disability 0.047 Permanent impairment, >50% disability 0.02
Permanent impairment, ≤50% disability 0.039 Permanent impairment, ≤50% disability 0.03
Readmission 0.21 Moderate impairment, recovery >6 months 0.028 Moderate disability 0.617 Moderate impairment, recovery >6 months 0.10
A&E visit 0.11 Moderate impairment, recovery 1–6 months 0.137 Moderate impairment, recovery 1–6 months 0.30
Physician visit 0.14 Minimal impairment, recovery <1 month 0.634 Minimal effect 0.257 Minimal impairment, recovery <1 month 0.50
No extra use of health service 0.51