Table 1—

Characteristics of patients with bronchiectasis according to nontuberculous mycobacterial(NTM) lung disease

Characteristics	With NTM^#	Without NTM^¶	p-value⁺
Mean age yrs	62.2±14.6	51.6±15.3	0.002
Sex
Male	9	23	0.46
Female	21	38
Underlying aetiology of bronchiectasis^§
Idiopathic	10	27	0.002
Post-tuberculosis	4	0
Post-adult infection	1	10
Post-childhood infection	2	8
Rheumatoid arthritis	2	1
Primary ciliary dyskinesia	3	7
Diffuse pan-bronchiolitis	0	2
Allergic bronchopulmonary Aspergillosis	4	3
Yellow nail syndrome	0	3
Miscellaneous	4	0
Pulmonary function tests
FEV₁ L	1.6±0.8	2.0±0.8	0.02
RV % pred	147±35	152±45	0.62
T_L,CO % pred	67±25	77±15	0.05

Data are presented as mean±sd or n. FEV₁: forced expiratory volume in one second; RV: residual volume; % pred: % predicted; T_L,CO: transfer factor of the lung for carbon monoxide. ^#: n = 30; ^¶: n = 61; ⁺: univariate analysis using Chi-squared or Fisher's exact test for contingency tables and unpaired t-test for comparison of means; ^§: the most predominant aetiology reported; some patients had two aetiologies.