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Table 4 Reliability of assessment between reviewers in the first and the second screening

From: Estimating the incidence of adverse events in Portuguese hospitals: a contribution to improving quality and patient safety

Question

Screening

K statistic

CI 95%

p-value

Presence of one or more positive criteria in the medical record analyzed

Screening 1

0.63 (83.5% agreement)

(0.43; 0.79)

< 0.001

AE confirmed by physician

Screening 2

0.78 (89% agreement)

(0.49; 1)

< 0.001

Level of preventability (scale 1–6)

Screening 2

0.58 (79% agreement)

(0.23; 0.94)

0.009