. 2017 Mar;38(3):523–530. doi: 10.3174/ajnr.A5048

Table 2:

P values from the statistical tests among different groups after correction for multiple comparisons (Tukey test)^a

	PD vs HC	PSP-P vs HC	PSP-RS vs HC	PSP-P vs PD	PSP-RS vs PD	PSP-P vs PSP-RS
Age	1	1	.02^b	0.1	.01^b	1
Sex	.1	.0001^b	.1	.008^b	1	.01^b
Disease duration	–	–	–	1	.0001^b	.02^b
MMSE	–	–	–	1	.01^b	1
UPDRS-III	–	–	–	1	.0022^b	.002^b
HY	–	–	–	.0004^b	.94	.001^b
SCP right
Volume	.66	.008^b	.00005^b	.001^b	.000004^b	.95
FA	.01^b	.66	.0005^b	.004^b	1.45 × 10^−8b	.16
MD	.89	.38	.0003^b	.77	.01^b	.31
SCP left
Volume	.44	.03^b	.00008^b	.002^b	.000002^b	.81
FA	.15	.58	.0000005^b	.03^b	9.33 × 10^−10b	.007^b
MD	.70	.16	9.30 × 10^−10b	.67	.000001^b	.003^b

Note:— HC indicates healthy controls; MMSE, Mini-Mental State Examination; UPDRS-III, Unified Parkinson's Disease Rating Scale-Motor Examination; HY, Hohen and Yahr score.

Sex differences were assessed with χ² tests. Age differences were assessed with ANOVA. Disease duration differences were assessed using ANCOVA, with age and sex as covariates. Other clinical and imaging differences were assessed with ANCOVA, with age, sex, and disease duration, as covariates. Correction for multiple comparisons was performed with the Tukey honest significant difference test.

Significant.