Table 2.

Pearson correlation testing between qualitative IgG indices and quantitative IgG and IgM titers using different methods (pooled data).

Ig Method		IgG qualitative (ABBOTT)	IgG quantitative 1 (AESKU)	IgM quantitative 1 (AESKU)	IgG quantitative 2 (ANSH)	IgM quantitative 2 (ANSH)
IgG qualitative (ABBOTT)	R	–	0.87	0.54	0.35	0.60
	P value		<.001*	<.001*	0.019*	<0.001*
IgG quantitative 1 (AESKU)	R	0.87	–	0.41	0.42	0.38
	P value	<0.001*		0.003*	0.002*	0.006*
IgM quantitative 1 (AESKU)	R	0.54	0.41	–	-0.07	0.79
	P value	<0.001*	0.003*		0.623	<0.001*
IgG quantitative 2 (ANSH)	R	0.35	0.42	-0.07	–	0.09
	P value	0.019*	0.002*	0.623		0.544
IgM quantitative 2 (ANSH)	R	0.60	0.38	0.79	0.09	–
	P value	<0.001*	0.006*	<0.001*	0.544

R, Pearson’s correlation coefficient; * statistically significant result (P < 0.05).

Bold values mean statistically significant P values.