Serum C4b, FN, PEPD levels between controls and pulmonary tuberculosis patients classified by NTA classification. A P-value of less than 0.05 indicates statistical significance using the Mann–Whitney U-test. Min-PTB: minimal PTB; Mod-PTB: moderate PTB; Adv-PTB: advanced PTB; *
P < 0.05; **
P < 0.01. A: the levels of C4b; B: the levels of FN; C: the levels of PEPD.