Table 1 Demographic distribution of healthy controls and tuberculosis patients.

From: Polymorphisms of cytokine genes and tuberculosis in two independent studies

Parameters

Cases

Controls

P value

Han population

n = 636

n = 608

 

Age (mean ± SD, years)

36.8 ± 15.7

37.1 ± 15.7

0.677

Male, n (%)

324 (50.9)

302 (49.7)

0.654

Smoking, n (%)

195 (69.3)

141 (76.8)

0.003?

Location of TB, n (PTB/EPTB)

276/360

  

Acid-fast bacilli stain positive, n (positive/negative)

138/360

  

Culture positive n (positive/negative)

32/126

  

TB-DNA positive n (positive/negative)

122/133

  

Tibetan population

n = 613

n = 603

 

Age, (mean ± SD, years)

34.5 ± 14.5

34.6 ± 13.8

0.909

Male, n (%)

327 (53.3)

333 (55.2)

0.511

  1. Abbreviations: SD, standard deviation; PTB, pulmonary tuberculosis; EPTB, extra-pulmonary tuberculosis.