TABLE 1

Patient characteristics

CharacteristicControl (n = 122)Possible (n = 51)Proven (n = 96)P value
Age, yr71.975.47.35nsa
No. male/female74/4842/978/180.01
No. with underlying pulmonary disease (%)0.01
    Sequelae of tuberculosis28 (23.0)13 (25.5)37 (38.5)
    COPDb23 (18.9)14 (27.5)22 (22.9)
    Pulmonary fibrosis32 (26.2)9 (17.6)7 (7.3)
    Nontuberculous mycobacteriosis11 (9.0)5 (9.8)13 (13.5)
    Bronchiectasis19 (15.6)8 (15.7)4 (4.2)
    Bullae of lung8 (6.5)1 (1.9)11 (11.5)
    Other1 (0.8)1 (1.9)2 (2.1)
  • a ns, Not significant.

  • b COPD, chronic obstructive pulmonary disease.