. Author manuscript; available in PMC: 2010 Dec 28.

Published in final edited form as: Infect Control Hosp Epidemiol. 2010 Jul;31(7):694–700. doi: 10.1086/653206

TABLE 2.

Positive Predictive Value (PPV) According to Site of Infection for Noninvasive Infections due to Staphylococcus aureus

Site of infection	True infections^a (n = 76)	False-positive results^b (n = 20)	PPV, % (95% CI)^c
Skin and soft tissue	54	3	95 (86–98)
Bone and joints	7	2	78 (45–94)
Endovascular site	2	1	67 (21–94)
Respiratory tract	6	5	55 (28–79)
Nonspecific site	5	2	71 (36–92)
Urinary tract	2	7	22 (8–64)

NOTE. Site of infection based on matching ICD-9-CM code for infection. CI, confidence interval.

Cases that were identified with use of algorithm and also meet reference standard criteria.

Cases that were identified with use of algorithm but do not meet reference standard criteria.

According to site of infection based on random sample of validation cohort.