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Table 1 Percent-number and mean ± SD of Stimulation-Indices in PBMC assays with BCGr32Kda protein in different categories of children.

From: Age-related waning of in vitroInterferon-γ levels against r32kDaBCG in BCG vaccinated children

  Scar +ve
n = 45
Scar -ve
n = 45
TB
n = 25
P value
Mean (± SD) of positive SIs 4.9 ± 1.9a 2.9 ± 1.17b 2.9 ± 0.73c p < 0.0004ab
p < 0.0014ac
Mean (± SD) of negative SIs 1.6 ± 0.29 1.6 ± 0.31 1.7 ± 0.20  
%n with positive SI* 79 39 58  
%n with negative SI* 21 61 42  
  1. Stimulation Indices (SI) < 2: negative & ≥ 2: positive in T cell assays.
  2. Statistical analysis of the mean values of SIs was done by Student's t-test.
  3. Chi-square test to compare number of children was done by cross tabulation method:
  4. *Scar positive Vs. Scar negative, χ2 = 10.465; p < 0.001
  5. * Scar positive Vs. Tuberculosis, χ2 = 3.630; p < 0.057
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