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Table 1 Summary data describing study subjects undergoing sweat evaporimetry

From: Acquired defects in CFTR-dependent β-adrenergic sweat secretion in chronic obstructive pulmonary disease

  

Healthy never smokers

Healthy active smokers

COPD active smokers

COPD former smokers

P Value

Pairwise with P < 0.05

(ANOVA)

N

 

18

12

25

12

  

Age (mean, SD)

 

47 ± 9

52 ± 8

58 ± 9

68 ± 8

< 0.001

HNS-CS, HNS-CFS, HS-CFS, CS-CFS

Gender N (%)

       
 

Male

11 (61%)

6 (50%)

19 (76%)

9 (75%)

0.387

 
 

Female

7 (39%)

6 (50%)

6 (24%)

3 (25%)

  

Race N (%)

       
 

Caucasian

13 (72%)

4 (27%)

14 (56%)

8 (67%)

0.185

 
 

African-American

5 (28%)

8 (63%)

11 (44%)

4 (33%)

  

Chronic bronchitis N (%)

0 (0%)

2 (18%)

13 (52%)

6 (50%)

< 0.001

HNS-CS, HNS-CFS, HS-CS

Spirometry

       
 

FEV1 (L) (Mean, SD)

3.55 ± 1.02

2.92 ± 0.82

2.03 ± 0.73

1.23 ± 0.40

< 0.001

HNS-CS, HNS-CFS, HS-CS, HS-CFS, CS-CFS

 

FEV 1 % pred (Mean, SD)

1.03 ± 0.10

0.97 ± 0.12

0.60 ± 0.16

0.41 ± 0.18

< 0.001

HNS-CS, HNS-CFS, HS-CS, HS-CFS, CS-CFS

Pack-years (Mean, SD)

0

31.08 ± 14

38 ± 19

44 ± 19

<0.0001

HNS-HS, HNS-CS, HNS-CFS

MMRC (Mean, SD)

 

0.06 ± .236

0.83 ± .577

1.96 ± 1.197

2.83 ± 1.03

< 0.001

HNS-HS, HNS-CS, HNS-CFS, HS-CS, HS-CFS, CS-CFS

BCSS (Mean, SD)

 

0.06 ± 0.236

0.75 ± 0.965

3.46 ± 3.007

2.67 ± 2.43

< 0.001

HNS-CS, HNS-CFS, HS-CS, HS-CFS

  1. MMRC = Modified Medical Research Council criteria; BCSS = Breathlessness, Cough and Sputum Scale. The mean and standard deviation for clinical characteristics for our patient cohorts are provided. Post-hoc pairwise analysis was done using least significant difference as appropriate. HNS = Healthy Never Smokers; HS = Healthy Smokers; CS = COPD Active Smokers; CFS = COPD Former Smokers.