Table 4.

Operating Characteristics of Discharge Summary Screening for Adverse Events

	Adverse Event
	Yes	No	Total
DC summary screen positive
Yes	11	16	27
No	37	181	218
Total	48	197	245

Sensitivity: 0.23 (0.11–0.35); Specificity: 0.92 (0.88–0.96); +LR: 2.82 (1.40–5.68); −LR: 0.83 (0.72–0.98); positive predictive value: 0.41 (0.25–0.59); negative predictive value: 0.83 (0.77–0.87).

Patients were classified as having an adverse event if physicians judged their poor outcome to be due to medical treatment.