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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: Exp Neurol. 2012 Nov 28;240:190–204. doi: 10.1016/j.expneurol.2012.11.020

Table 2B.

Case demographics (Parkinson’s Disease)

Group Stage 0 Stage I Stage IIa Stage IIb Stage III Stage IV TOTAL
PD (no dementia)/(n) Disease duration (yrs) 3 (4.7±4.2) 4 (16,5±5.8) 7
PD (AD dementia)/(n) Disease duration (yrs) 1 (2) 9 (16.3±9.3) 10 (10.7±5.7) 19
PD (non-AD dementia)/(n) Disease duration (yrs) 1 (23) 17 (13.1±7.7) 7 (17.3±11.3) 25

Group: PD (AD dementia): PD with dementia due to Alzheimer’s disease. PD (non-AD dementia); PD with dementia but with insufficient pathology for AD diagnosis.