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Volume 17, Number 3—March 2011


Distinguishing Tuberculosis from Nontuberculous Mycobacteria Lung Disease, Oregon, USA

Brian A. KendallComments to Author , Cara D. Varley, Dongseok Choi, P. Maureen Cassidy, Katrina Hedberg, Mary A. Ware, and Kevin L. Winthrop
Author affiliations: Author affiliations: University of Utah, Salt Lake City, Utah, USA (B.A. Kendall); Oregon Health and Science University, Portland, Oregon, USA (C.D. Varley, D. Choi, K.L. Winthrop); Oregon Public Health Division, Portland (P.M. Cassidy, K. Hedberg); Multnomah County Health Department, Portland (M.A. Ware)

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Table 2

PPVs of patient characteristics for tuberculosis in Oregon, USA, an area of low tuberculosis incidence, 2005–2006*

Variable No. patients No. TB cases PPV for TB (95% CI)
Age <50 y, not US born 44 43 0.98 (0.88–1.00)
Age >50 y, US born, COPD 12 1 0.08 (0.00–0.38)
COPD 31 2 0.06 (0.01–0.21)
Age <50 y 70 49 0.70 (0.58–0.80)
Not US born 80 65 0.81 (0.71–0.89)
Infiltrate 137 68 0.50 (0.41–0.58)
Constitutional symptoms 117 56 0.48 (0.39–0.57)

*PPV using all patients (n = 207); tuberculosis cases = 80. PPV, positive predictive value; TB, tuberculosis; CI, confidence interval; COPD, chronic obstructive pulmonary disease.

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