The odor stick identification test for Japanese differentiates Parkinson's disease from multiple system atrophy and progressive supra nuclear palsy

Table 1 Comparison of the four groups of subjects enrolled in the present study.

	control	PD	PD (disease duration ≤ 3 years)	MSA-P	PSP	p value
n	29	94	36	15	7	N/A
Age¹ (years)	66.1 ± 8.8	68.6 ± 9.7	70.1 ± 8.6	67.3 ± 9.2	70.6 ± 9.9	ns
Males/females	9/20	47/47	19/16	9/6	4/3	N/A
Disease duration² (years)	N/A	5.1 ± 4.4	1.5 ± 1.1	2.1 ± 1.7	2.4 ± 2.0	ns
HY stage²	N/A	2.3 ± 0.8	2.1 ± 0.7	3.0 ± 0.9*	3.1 ± 0.8*	0.0003
MMSE¹	29.6 ± 0.7	28.4 ± 1.9	28.6 ± 1.5	28.5 ± 1.9	28.6 ± 1.5	ns
UPDRS (total)²	N/A	36.9 ± 17.2	34.7 ± 16.4	34.8 ± 15.6	48.2 ± 18.1	ns
UPDRS (part III)²	N/A	23.1 ± 11.5	22.4 ± 11.3	22.8 ± 13.1	26.2 ± 9.8	ns

Data are mean ± SD, ¹Kruskal-Wallis equality-of-populations rank test, ²Mann-Whitney U test for data of PD, MSA-P and PSP groups. N/A, not applicable; ns, not significant; PD, Parkinson's disease; MSA-P, parkinsonian variant of multiple system atrophy; PSP, progressive supranuclear palsy; HY stage, Hoehn Yahr stage; MMSE, mini mental state examination; UPDRS, Unified Parkinson's Disease Rating Scale.

ISSN: 1471-2377