Prevalence and clinical classification of tremor in elderly—A community-based survey in Brazil

Authors

  • Maira Tonidandel Barbosa MD, PhD,

    1. Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author
  • Paulo Caramelli MD, PhD,

    1. Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author
  • Mauro César Quintão Cunningham MD, MSc,

    1. Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author
  • Débora Palma Maia MD, MSc,

    1. Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author
  • Maria Fernanda Furtado Lima-Costa MD, PhD,

    1. Oswaldo Cruz Foundation-René Rachou Research Center, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author
  • Francisco Cardoso MD, PhD

    1. Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
    Search for more papers by this author

  • Funding agencies: This study was supported by Fundação de Amparo à Pesquisa de Minas Gerais (FAPEMIG), Brazil. Maira Tonidandel Barbosa, MD, PhD, received a postdoctoral scholarship from FAPEMIG, Brazil. Paulo Caramelli receives research grants from CNPq (Bolsa de Produtividade em Pesquisa) and FAPEMIG (Bolsista Pesquisador Mineiro), Brazil.

  • Relevant conflicts of interest/financial disclosures: F.C. has received honoraria from Moksha8 and Roche and a research grant from FAPEMIG.

  • Full financial disclosures and author roles may be found in the online version of this article.

Correspondence to: V Dr. Francisco Cardoso, Professor of Neurology, Av Pasteur, 89/1107, 30150-290, Belo Horizonte (MG), Brazil; cardosofe@terra.com.br

ABSTRACT

Prevalence data on different types of tremor among the elderly population are very scarce. The objective of this study was to study the prevalence of tremor in a community-dwelling elderly population in the town of Bambuí, Brazil. The authors studied 1186 inhabitants aged≥64 years. This was a 2-phase study in which all participants who screened positive in a questionnaire for tremor and parkinsonism or who used drugs capable of causing/suppressing tremor were examined. In this population, the prevalence rate was 17.4% for tremor, 7.4% for essential tremor, 5.6% for parkinsonian tremor, 2.8% for enhanced physiological tremor, and 1.6% for other causes. There were no gender differences in prevalence rates for all types. Patients who had Parkinson's disease with tremor were older than those who had essential tremor, whereas patients who had enhanced physiological tremor were significantly younger. The age-specific prevalence of tremor increased with advancing age for both men and women. The prevalence of tremor in the studied population was high and increased with advancing age. Essential tremor, parkinsonian tremor, and enhanced physiological tremor were the most commonly identified causes. © 2013 Movement Disorder Society

Ancillary