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. 1999 Jul-Aug;6(4):313–321. doi: 10.1136/jamia.1999.00660313

Table 4.

Severity of Adverse Drug Events (ADEs) and Potential ADEs, by Period*

Baseline Period 1 Period 2 Period 3
ADEs, not preventable: 20 24 17 16
Life-threatening 0 (0%) 2 (8%) 2 (12%) 0 (0%)
Serious 3 (15%) 4 (17%) 6 (35%) 6 (38%)
Significant 17 (85%) 18 (75%) 9 (53%) 10 (62%)
ADEs, preventable: 5 15 2 2
Life-threatening 1 (20%) 4 (27%) 1 (50%) 0 (0%)
Serious 4 (80%) 5 (33%) 0 (0%) 0 (0%)
Significant 0 (0%) 6 (40%) 1 (50%) 2 (100%)
Potential ADEs, not intercepted: 8 4 1 0
Life-threatening 1 (13%) 0 (0%) 0 (0%) 0 (0%)
Serious 5 (63%) 1 (25%) 1 (100%) 0 (0%)
Significant 2 (25%) 3 (75%) 0 (0%) 0 (0%)
Non-intercepted serious medication errors: 13 19 3 2
Life-threatening 2 (15%) 4 (21%) 1 (33%) 0 (0%)
Serious 9 (69%) 6 (32%) 1 (33%) 0 (0%)
Significant 2 (15%) 9 (47%) 1 (33%) 2 (100%)
Potential ADEs, intercepted: 27 82 106 1
Life-threatening 3 (11%) 78 (95%) 99 (93%) 0 (0%)
Serious 12 (44%) 2 (2%) 4 (4%) 0 (0%)
Significant 12 (44%) 2 (2%) 3 (3%) 1 (100%)
*

Percentage totals may not add to 100, because of rounding.

Non-intercepted serious medication errors are the sum of preventable ADEs and non-intercepted potential ADEs.