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Table 2 Comparisons of the clinical and radiological characteristics according to positive result in serial bronchial washing specimens in 163 patients*

From: Additional role of second washing specimen obtained during single bronchoscopy session in diagnosis of pulmonary tuberculosis

  BW1 (+) (n = 30) BW2 (+) (n = 22) BW1 & 2 (+) (n = 111) P value
Age, years 54 (34 – 71) 60 (29 – 71) 52 (34 – 68) 0.898
Gender, female 11 (37) 12 (54) 57 (51) 0.310
Presence of Comorbidity 11 (37) 10 (46) 51 (46) 0.657
Immunocompromised patients 1 (3) 1 (5) 11 (10) 0.407
Current of ex- smoker 12 (40) 9 (41) 42 (38) 0.951
Previous history of treatment TB 5 (17) 4 (18) 23 (21) 0.869
Clinical Symptom 13 (43) 8 (36) 51 (46) 0.707
No symptoms 17 (57) 14 (64) 60 (54) 0.707
Chest radiology     
  Fibrotic scar 1 (3) 0 6 (5) 0.500
  Cavitation 3 (10) 5 (23) 10 (9) 0.169
  Nodules 16 (53) 17 (77) 58 (52) 0.093
  Mass 5 (17) 0 7 (6) 0.057
  Consolidation 6 (20) 3 (14) 34 (31) 0.174
  Atelectasis 1 (3) 3 (14) 13 (12) 0.358
  Effusion 1 (3) 1 (5) 6 (5) 0.894
Drug resistance 3 (10) 7 (32) 17 (15) 0.092
  1. BW, Bronchial washing.
  2. Categorical variables were denoted by No. of patients (%).
  3. Continuous variable was denoted by median (IQR).
  4. *Patients with positive results for M. tuberculosis from bronchial washing.
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