IMPORTANCE: Mild cognitive impairment (MCI) is common in Parkinson disease (PD), but the prognostic value of MCI in early PD is unknown. OBJECTIVE: To examine the course of MCI and its progression to dementia in an incident PD cohort. DESIGN: Prospective longitudinal cohort study. SETTING: The Norwegian ParkWest study, an ongoing population-based study of the incidence, neurobiology, and prognosis of PD in western and southern Norway. PARTICIPANTS: A population-based cohort of 182 patients with incident PD monitored for 3 years. MAIN OUTCOMES AND MEASURES: Serial neuropsychological tests of attention, executive function, verbal memory, and visuospatial skills were administered at baseline, 1 year, and 3 years. Patients were classified as having MCI and received a diagnosis of dementia according to published consensus criteria. RESULTS: Significantly more patients with MCI than without MCI at baseline (10 of 37 [27.0%] vs 1 of 145 [0.7%]; relative risk, 39.2 [95% CI, 5.2-296.5]; P < .001) progressed to dementia during follow-up. Of those with MCI at baseline, 8 of 37 (21.6%) had MCI that reverted to normal cognition during follow-up. Mild cognitive impairment at the 1-year visit was associated with a similar progression rate to dementia (10 of 36 patients [27.8%]) and reversion rate to normal cognition (7 of 36 [19.4%]). However, among the 22 patients with persistent MCI at baseline and the 1-year visit, 10 (45.5%) developed dementia and only 2 (9.1%) had MCI that reverted to normal cognition by the end of study. CONCLUSIONS AND RELEVANCE: Mild cognitive impairment at PD diagnosis predicts a highly increased risk for early dementia. Repeated neuropsychological testing increases the prognostic accuracy of MCI with respect to early dementia development in PD.
IMPORTANCE: Mild cognitive impairment (MCI) is common in Parkinson disease (PD), but the prognostic value of MCI in early PD is unknown. OBJECTIVE: To examine the course of MCI and its progression to dementia in an incident PD cohort. DESIGN: Prospective longitudinal cohort study. SETTING: The Norwegian ParkWest study, an ongoing population-based study of the incidence, neurobiology, and prognosis of PD in western and southern Norway. PARTICIPANTS: A population-based cohort of 182 patients with incident PD monitored for 3 years. MAIN OUTCOMES AND MEASURES: Serial neuropsychological tests of attention, executive function, verbal memory, and visuospatial skills were administered at baseline, 1 year, and 3 years. Patients were classified as having MCI and received a diagnosis of dementia according to published consensus criteria. RESULTS: Significantly more patients with MCI than without MCI at baseline (10 of 37 [27.0%] vs 1 of 145 [0.7%]; relative risk, 39.2 [95% CI, 5.2-296.5]; P < .001) progressed to dementia during follow-up. Of those with MCI at baseline, 8 of 37 (21.6%) had MCI that reverted to normal cognition during follow-up. Mild cognitive impairment at the 1-year visit was associated with a similar progression rate to dementia (10 of 36 patients [27.8%]) and reversion rate to normal cognition (7 of 36 [19.4%]). However, among the 22 patients with persistent MCI at baseline and the 1-year visit, 10 (45.5%) developed dementia and only 2 (9.1%) had MCI that reverted to normal cognition by the end of study. CONCLUSIONS AND RELEVANCE: Mild cognitive impairment at PD diagnosis predicts a highly increased risk for early dementia. Repeated neuropsychological testing increases the prognostic accuracy of MCI with respect to early dementia development in PD.
Authors: Jennifer G Goldman; Samantha Holden; Bryan Bernard; Bichun Ouyang; Christopher G Goetz; Glenn T Stebbins Journal: Mov Disord Date: 2013-10-09 Impact factor: 10.338
Authors: Jeroen Hoogland; Lennard L van Wanrooij; Judith A Boel; Jennifer G Goldman; Glenn T Stebbins; John C Dalrymple-Alford; Connie Marras; Charles H Adler; Carme Junque; Kenn F Pedersen; Brit Mollenhauer; Cyrus P Zabetian; Paul J Eslinger; Simon J G Lewis; Ruey-Meei Wu; Martin Klein; Maria C Rodriguez-Oroz; Davide M Cammisuli; Paolo Barone; Roberta Biundo; Rob M A de Bie; Ben A Schmand; Alexander I Tröster; David J Burn; Irene Litvan; J Vincent Filoteo; Gert J Geurtsen; Daniel Weintraub Journal: Mov Disord Date: 2018-09-14 Impact factor: 10.338
Authors: María C Rodriguez-Oroz; Belen Gago; Pedro Clavero; Manuel Delgado-Alvarado; David Garcia-Garcia; Haritz Jimenez-Urbieta Journal: Curr Neurol Neurosci Rep Date: 2015-07 Impact factor: 5.081