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Table 1 Preventability of adverse medicine events associated with hospitalisation or admissions due to medication-related problems

From: Medication safety in acute care in Australia: where are we now? Part 1: a review of the extent and causes of medication problems 2002–2008

   Total number of medicine-related problems or admissions Percentage considered definitely avoidable Percentage considered probably or possibly avoidable Percentage considered probably not or definitely unavoidable
Titchen et al., 2005 [35] Hospital Paediatric NSAID ADRs 25 36%   
Easton et al., 2004 [36] Paediatric admissions 81 46.9%   30.9%
Easton-Carter et al., 2003 [6] Paediatric emergency department attendances 187 51.3%   36.9%
Chan et al., 2001 [37] Geriatric admissions 73 53.4 23.3 23.3
Lau et al., 2004 [4] Hospital Oncology ADRs 454 1.6% 46.1% 53.4%
Dartnell et al 1996 [38] General admissions 55* 5% 60% 35%
Sarkawi et al, 1995 [39] Medical admissions 35* 23% 46% 31%
Easton 1998 [40] Paediatric admissions 48*+ # 67% 29%
Ng 1996 [41] Geriatric admissions 31 3% 29% 68%
  1. * – overdose excluded; # – category not used; + – 2 cases not assessable. ADRs = adverse drug reactions; NSAID = non-steroidal anti-inflammatory drug. Note: estimates of adverse drug event preventability in the community from one study were 23% [9].