Table 4.

The levels of neuropathologic proteins in CSF from the PD-OD and PD-NOD groups.

	PD-NOD group	PD-OD group	p
	(n = 24)	(n = 52)
α-Synuclein (ng/ml, mean ± SD)	10.08 ± 3.22	13.55 ± 3.93	<0.001*
Aβ1-42 (ng/ml, mean ± SD)	0.74 ± 0.28	0.84 ± 0.34	0.23
T-tau (pg/ml, mean ± SD)	163.93 ± 42.99	138.33 ± 40.30	0.031
P-tau (S199) (pg/ml, mean ± SD)	10.65 ± 4.25	11.06 ± 7.03	0.802
P-tau (S396) (pg/ml, mean ± SD)	72.50 ± 29.81	71.02 ± 26.01	0.834
P-tau (T181) (pg/ml, mean ± SD)	67.33 ± 31.54	74.24 ± 30.13	0.384
P-tau (T231) (pg/ml, mean ± SD)	147.83 ± 68.22	174.97 ± 85.88	0.207

^*P was significant after Bonferroni correction. Aβ, β amyloid; T-tau, total tau; P-tau, phosphorylated tau; SD, standard deviation; Q1, first quartile; Q3, third quartile; PD-OD, Parkinson disease with olfactory dysfunction; PD-NOD, Parkinson disease with no olfactory dysfunction.