@article{ref1,
title="Long-term risk of falls in an incident Parkinson's disease cohort: the Norwegian ParkWest study",
journal="Journal of neurology",
year="2016",
author="Hiorth, Ylva Hivand and Alves, Guido and Larsen, Jan Petter and Schulz, Jörn and Tysnes, Ole-Bjørn and Pedersen, Kenn Freddy",
volume="264",
number="2",
pages="364-372",
abstract="The objective of this study is to examine the frequency, development, concomitants, and risk factors of falls in a population-based incident Parkinson's disease (PD) cohort. One hundred eighty-one drug-naïve patients with incident PD and 173 normal controls recruited from the Norwegian ParkWest study were prospectively monitored over 7 years. Information on falls was obtained biannually from patients, and at baseline and after 1, 3, 5, and 7 years of follow-up in control subjects. Generalized estimating equation models for correlated data were applied to investigate concomitant features of falls and risk factors for incident falls during 7 years of follow-up in PD. Overall, 64.1% of patients reported falling during the study period. The 7-year cumulative incidence of falls in non-falling patients at baseline (n = 153) was 57.5%, with a relative risk to controls of at least 3.1 (95% confidence interval 1.5-6.3; p < 0.002). Significant concomitants of falls in patients during the study period were higher age, Unified PD Rating Scale motor score, postural instability and gait difficulties (PIGD) phenotype, dementia, and follow-up time. Higher age at baseline, PIGD phenotype at 1-year visit, and follow-up time were independent risk factors for incident falls during follow-up. Nearly two-thirds of patients in the general PD population experience falls within 7 years of diagnosis, representing a more than threefold increased risk compared to age- and gender-matched controls. Patients with higher age at baseline and early PIGD have the greatest risk of falling and may, therefore, be the prime target of specialized assessment and treatment interventions.<p /> <p>Language: en</p>",
language="en",
issn="0340-5354",
doi="10.1007/s00415-016-8365-z",
url="http://dx.doi.org/10.1007/s00415-016-8365-z"
}