TABLE 3.

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

Year	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
2001	15.1 (12.1–18.2)	99.7 (99.7–99.7)	30.6 (25.0–36.1)	99.3 (99.2–99.3)
2002	18.5 (15.5–21.5)	99.6 (99.5–99.6)	30.2 (25.6–34.7)	99.2 (99.1–99.3)
2003	24.3 (21.5–27.2)	99.4 (99.3–99.5)	36.6 (32.7–40.6)	98.9 (98.8–99.0)
2004	28.2 (25.1–31.4)	99.3 (99.2–99.3)	31.5 (28.1–35.0)	99.1 (99.1–99.2)
2005	17.4 (15.0–19.7)	99.2 (99.2–99.3)	23.9 (20.7–27.1)	98.8 (98.8–98.9)
2006	24.5 (21.8–27.3)	99.1 (99.0–99.1)	25.3 (22.4–28.1)	99.0 (98.9–99.1)
2007	33.9 (31.0–36.7)	99.1 (99.1–99.2)	37.0 (34.0–40.0)	99.0 (98.9–99.1)

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