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Table 3 Comparison of selected variables between patients with and without evidence of mycobacterium infection

From: Evidence of mycobacterial disease in COPD patients with lung volume reduction surgery; the importance of histological assessment of specimens: a cohort study

Age, BMI, Exacerbations/Year and Pre-Operative Lung Function of patients without mycobacterium evidence compared to those with mycobacterium evidence (Mean ± SD)
  No Mycobacterium Mycobacterium P value 95% CI
No. of patients 112 14  
Male: Female ratio 89:23 9:5 0.303
Age, years 57.5 ± 10.39 63.0 ± 6.02 0.054
(95% CI: −0.096-11.15)
BMI 23.9 ± 4.04 22.1 ± 4.36 0.110
(95% CI: −4.15-0.42)
Exacerbations/Year 2.2 ± 2.40 5.3 ± 2.69 <0.001
(Mann–Whitney Test, 95% CI not possible)
FEV 1 , % predicted 37.7 ± 17.17 25.0 ± 6.58 <0.001
(95% CI: −17.55 -7.84)
FVC, % predicted 81.7 ± 21.44 74.1 ± 15.00 0.207
(95% CI: −19.23-4.20)
TLCO, % predicted 42.6 ± 17.88 30.7 ± 9.11 <0.001
(95% CI: −18.05-- 5.85)
RV, % predicted 218.1 ± 59.20 215.6 ± 63.17 0.881
(95% CI: −36.11-31.02)
TLC, % predicted 127.8 ± 21.49 130.0 ± 23.10 0.722
(95% CI: −9.99- 14.39)
  1. Data shown as mean ± SD. FEV1: Forced expiratory volume in 1 sec; FVC: Forced vital capacity; TLCO: Transfer factor of the lung for carbon monoxide; RV: Residual volume; TLC: Total lung capacity. These variables are all shown as percentage predicted.