Table 2.

Correlation between each component of the olfactory function test (YSK) and the scores of the PEA sniffing bead system in subjects with and without cognitive impairment

	Normal		Cognitive impairment		Total
	Coefficient	p	Coefficient	p	Coefficient	p
YSK_threshold	0.479	< 0.001	0.415	0.002	0.429	< 0.001
YSK_discrimination	0.195	0.074	0.185	0.183	0.140	0.101
YSK_identification	0.316	0.003	0.257	0.068	0.208	0.014
YSK_TDI	0.429	< 0.001	0.385	0.004	0.316	< 0.001

Coefficient, Pearson’s correlation coefficient; YSK_TDI YSK_threshold-discrimination-identification