TABLE 2.

Validity of the International Classification of Diseases, 9th Revision, Clinical Modification Code V09 for Prediction of Methicillin-Resistant Staphylococcus aureus Infection, According to Study Hospital Location

Location	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
Hospital A	21.3 (19.8–22.8)	98.9 (98.8–98.9)	22.4 (20.8–24.0)	98.8 (98.8–98.9)
Hospital B	34.2 (31–37)	99.6 (99.5–99.6)	34.0 (30.9–37.2)	99.5 (99.5–99.6)
Hospital C	23.3 (21.5–25.2)	99.7 (99.6–99.7)	52.7 (49.4–55.9)	98.9 (98.9–99.0)
Total	24.0 (22.9–25.1)	99.3 (99.3–99.3)	30.8 (29.4–32.1)	99.1 (99.0–99.1)

note. NPV, negative predictive value; PPV, positive predictive value.