Table 3.

Spearman rank order correlation coefficients (rho) between IgG3 and PD2

	rho	P value
Overall (n = 198)	0.444	< 0.001
Control (n = 99)	0.501	< 0.001
PD (n = 99)	0.396	< 0.001
Female (n = 99)	0.555	< 0.001
Male (n = 99)	0.330	0.001

PD, Parkinson’s disease