Table 1: Baseline characteristics of cohort.

Cohort No chest PT Chest PT p value
n = 77 n = 38 n = 39
Demographics
Age 67 ± 14 66 ± 16 68 ± 11 0.93
Body mass index 25 ± 5 24 ± 5 25 ± 5 0.65
Caucasian 69 (90) 35 (92) 34 (87) 0.47
Female 54 (70) 24 (63) 30 (77) 0.19
Smoking history 29 (38) 14 (37) 15 (38) 0.81
Pack years 6 ± 15 7 ± 15 5 ± 17 0.37
Past medical history
Allergic rhinitis 11 (14) 7 (18) 4 (10) 0.31
Asthma 16 (21) 6 (16) 10 (26) 0.29
COPD 23 (30) 11 (29) 12 (31) 0.86
Hiatal hernia 15 (20) 6 (16) 9 (23) 0.42
Hypertension 33 (42) 17 (45) 16 (41) 0.74
Pneumonia 32 (42) 13 (34) 19 (49) 0.2
Reflux 47 (61) 23 (61) 24 (62) 0.93
Sinusitis 18 (23) 10 (26) 8 (21) 0.55
Tuberculosis 4 (5) 1 (3) 3 (8) 0.32
Symptoms
Chest congestion 3 (4) 0 (0) 3 (8) 0.08
Cough 38 (49) 12 (32) 26 (67) 0.002
Fatigue 3 (4) 0 (0) 3 (8) 0.08
Heartburn 19 (25) 5 (13) 14 (36) 0.02
Hemoptysis 4 (5) 1 (3) 3 (8) 0.32
Postnasal drip 4 (5) 0 (0) 4 (10) 0.04
Sputum 30 (39) 7 (18) 23 (59) < 0.001
Wheezing 4 (5) 1 (3) 3 (8) 0.32
Mycobacterial culture
Myocobacterium avium complex 71 (92) 34 (89) 37 (95) 0.38
Mycobacterium gordonae 4 (5) 3 (8) 1 (3) 0.29
Mycobacterium kansasii 1 (1) 1 (3) 0 (0) 0.31
Mycobacterium xenopi 1 (1) 0 (0) 1 (3) 0.32
CT chest findings
Bronchiectasis 22 (29) 12 (32) 10 (26) 0.56
Bronchiolitis 12 (16) 5 (13) 7 (18) 0.56
Bronchial wall thickening 19 (25) 8 (21) 11 (28) 0.47
Ground glass opacities 9 (12) 6 (16) 3 (8) 0.09
Mucoid impaction 11 (14) 3 (8) 8 (21) 0.11
Intervention
Bronchodilator therapy 11 (14) 3 (8) 8 (21) 0.11
Inhaled corticosteroid 11 (14) 3 (8) 8 (21) 0.11
Proton pump inhibitor or H2 blocker 20 (26) 7 (18) 13 (33) 0.14

Data expressed as mean ± SD or N (%); p value based on chi-square for categorical variables and mann - whitney for continuous variables; COPD = chronic obstructive pulmonary disease; CT = computerized tomography.