Table 2: Preventable adverse drug event rates (pADEs).

Comparison armIntervention arm (unaided)Intervention arm (with PEA)

Severity of pADEBefore ( )After ( )Before ( )After ( )Before ( )After ( )
All Severities27 (10.7)25 (8.5)38 (9.1)18 (4.6)56 (12.4)27 (7.4)*
None/Minimal or Mild18 (7.1)12 (4.1)27 (6.5)15 (3.8)27 (5.8)21 (5.8)
Moderate or Severe9 (3.6)13 (4.4)11 (2.6)3 (0.8)29 (6.4)6 (1.6)**

* by paired t-test (after versus before) at the site level.
** by paired t-test (after versus before) at the site level.
Values presented as number of pADEs (rate per 100 patient-yrs).