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Table 2 Features of patients with pulmonary M. tuberculosis and nontuberculous mycobacteria infection.

From: Mycobacterial infections in a large Virginia hospital, 2001-2009

Characteristic Total
n = 363 (%)
NTM
n = 342 (%)
TB
n = 21 (%)
P value
Age (mean yrs) [SE mean]
Age≥60 yrs
57.2 [1.0]
186 (51)
57.6 [0.9]
176 (51)
50.0 [5.5]
10 (48)
p = 0.19
p = 0.73
Gender: Male 181 (49) 171 (50) 10 (48) p = 0.83
Immigrant 17 (5) 3 (1) 14 (67) p < 0.001
Predisposing risk factor for NTM** 261 (72) 252 (75) 9 (43) p = 0.002
CT scan     
Cavities 36 (14) 31 (13) 5 (38) p = 0.01
Bronchiectasis 58 (24) 56 (24) 2 (15) p = 0.74
Nodules 111 (45) 103 (45) 8 (61) p = 0.23
Effusion 15 (6) 11 (5) 8 (61) p = 0.005
  1. *Note total number of pulmonary patients (n = 363) is lower than total number of lung infections (n = 394) because of mixed infections.
  2. **Predisposing risk factors for NTM = pre-existing lung disease (COPD, Cystic fibrosis, asthma, alpha-1-antitrypsin, interstitial lung disease, pulmonary alveolar proteinosis, pulmonary fibrosis, sarcoidosis, and silicosis) or host predisposition (diabetes, end-stage renal disease, collagen vascular disease, cancer, HIV, transplantation).