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Table 4 Correlations for clinical characteristics and serum protein levels of the pulmonary tuberculosis patients (N = 115)

From: Serum complement C4b, fibronectin, and prolidase are associated with the pathological changes of pulmonary tuberculosis

   Sputum smear NTA classification C4b FN PEPD
Sputum smear rs 1 0.19 0.11 0.22 0.10
  P a . 0.043* 0.244 0.028* 0.287
NTA classification rs   1 0.19 −0.18 0.08
  P a   . 0.045* 0.086 0.420
C4b rs    1 0.10 0.29
  P a    . 0.354 0.003**
FN rs     1 −0.05
  P a     . 0.659
PEPD rs      1
  P a      .
  1. The rs in [−0.3, -0.1] or [0.1, 0.3] means weak correlation, in [−0.5, -0.3] or [0.3, 0.5] means moderate correlation, and in [−0.7, -0.5] or [0.5, 0.7] means significant correlation. A P-value of less than 0.05 indicates statistical significance. N: number of subjects; a P value for Spearman Correlation. * P < 0.05; ** P < 0.01.