Research Article

Pulmonary Densitovolumetry Using Computed Tomography in Patients with Nontuberculous Mycobacteria: Correlation with Pulmonary Function Tests

Table 1

Patients and control subjects characteristics.

NTM GroupControl Groupp

No. of subjects3127
Demographic data
 Males, %15 (48.4%)13 (48.1)0.92
 Age, y57.2 ± 16.552.4 ± 15.30.12†
 BMI, kg/m223.8 ± 4.8725.8 ± 4.720.16†
NTM species
M. kansasii18 (58.1)
M. avium complex8 (25.8)
M. fortuitum3 (9.68)
M. gordonae1 (3.23)
M. abscessus1 (3.23)
Lung function
 FVC (% predicted)82.7 ± 25.3102 ± 8.120.005
 FEV1 (% predicted)72.7 ± 25.4101.2 ± 8.750.003
 FEV1/FVC (%)84.3 ± 15.282.1 ± 5.280.34†
 TLC (% predicted)90.4 ± 18.594.6 ± 9.110.25†
 RV (% predicted)119 ± 45.675.8 ± 23.20.001
 RV/TLC (%)37.5 ± 12.425.7 ± 8.900.02
 Raw (cmH2O/L/s)6.53 ± 3.772.31 ± 2.13<0.001

Values are means ± SD or number (%). Fisher exact test. †Student t-test.
BMI = body mass index; NTM = nontuberculous mycobacteria; FVC = forced vital capacity; FEV1 = forced expiratory volume in one second; TLC = total lung capacity; RV = residual volume; Raw = airway resistance.