. 2014 Mar 5;90(3):566–573. doi: 10.4269/ajtmh.12-0657

Table 3.

Analysis of correlation between the ability to produce IFN-γ in response to different antigens and the level of TT-specific antibodies

Coefficient of correlation (R)	PHA	PPD	TT	DT
IgG TT	0.0542	0.2124	0.4964^*	0.1370
PHA		0.2678^†	0.3313^†	0.1408
PPD			0.3834^†	0.2445^†
TT				0.3249^†

P < 0.001 using the non-parametric Spearman's rank correlation test.

^†

P < 0.05 using the non-parametric Spearman's rank correlation test.