Table 2 Mean (s.d.) for variables used to validate the four-cluster solution

From: The relationships between mild cognitive impairment and phenotype in Parkinson’s disease

 

YO (N=93)

TD (N=24)

NTD (N=48)

RDP (N=44)

Between-group differences

Age, years

63.22 (8.6)

65.79 (8.8)

68.93 (8.1)

72.01 (7.3)

F=12.97, df=3, P<0.001

Disease duration

6.59 (4.7)

3.51 (2.8)

9.07 (5.7)

2.14 (1.1)

H=71.02, df=3, P<0.001

Hoehn and Yahr stage, raw score

1.96 (0.5)

1.54 (0.5)

2.17 (0.6)

1.99 (0.6)

H=18.39, df=3, P<0.001

PDQ-39 cognitive impairment dimension (Q 30–33), scaled score

22.78 (17.23)

22.57 (18.46)

33.59 (21.21)

20.39 (15.31)

H=13.03, df=3, P=0.003

  1. Abbreviations: NTD, non-tremor dominant; PDQ-39, Parkinson’s Disease Questionnaire; RDP, rapid disease progression; TD, tremor dominant; YO, younger age of disease onset.
  2. Significant values are represented in bold.