Clinical Significance of Negative Costimulatory Molecule PD-1/PD-L1 on Peripheral Blood Regulatory T Cell Levels among Patients with Pulmonary Tuberculosis

Table 1

Comparison of subjects’ characteristics between the TB and control groups.

Characteristics	Control group (n = 20)	TB group (n = 30)
Mean age (year)	44.00 ± 8.12	41.80 ± 9.60
Gender (female/male)	12/18	9/11
Anti-Mycobacterium tuberculosis antibody (+/−)	0/20	8/4
Mycobacterium tuberculosis culture (+/−)	0/20	18/12
Tuberculin test (+/−)	0/20	19/11
CT examination (mild/severe)	0/0	27/3
Sputum smear (+/−)	0/20	16/14

Only 12 of the 30 patients with active tuberculosis were tested for anti-Mycobacterium tuberculosis antibody.