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Table 2 Consensus preventability ratings of 1356 adverse drug events, by assessment method

From: Methods for evaluating adverse drug event preventability in emergency department patients

Preventability Rating Best Practice-Based [4] Error-Based [23] Algorithm-Based [24]
Definitely or probably preventable, n (%, 95 CI) 869 (64.1, 61.5–66.6) 930 (68.5, 66.1–71.1) 873 (64.3, 61.8–66.9)
Definitely, n (%, 95 CI) 87 (6.4, 5.1–7.7) 93 (6.9, 5.5–8.2) 613 (45.2, 42.6–47.9)
Probably, n (%, 95 CI) 782 (57.7, 55.0–60.3) 780 (57.5, 54.9–60.2) 317 (23.4, 21.1–25.6)
Not preventable, n (%, 95 CI) 487 (35.9, 33.4–38.5) 483 (35.6, 33.1–38.2) 426 (31.4, 28.9–33.9)