BACKGROUND: The goal of this study was to assess the validity of a screening question for head tremor in essential tremor (ET). There are no published data on this topic, and the knowledge will guide future epidemiological investigations of this disorder. METHODS: These analyses utilized four distinct patient samples: a population-based study in northern Manhattan, a study of the environmental epidemiology of ET, a genetics study, and a brain repository. Sensitivity was the proportion of ET cases with head tremor on examination who self-reported head tremor. RESULTS: The sensitivity of the screening question for head tremor was lowest in the population-based study (31.6%), and higher as well as somewhat similar across the remaining studies (46.7 to 62.2%). Higher sensitivity was associated with tremor of longer duration, presence of voice tremor on examination, female gender, and lower education. The use of the screening question would have increased case ascertainment during the screening phase of these four studies by 1.9, 4.1, 10.2, and 20.3%. CONCLUSIONS: A screening question for head tremor had low-to-moderate sensitivity in ET. The use of such a screening questionnaire, however, has the potential to increase case ascertainment by as much as 20% in some screening settings.
BACKGROUND: The goal of this study was to assess the validity of a screening question for head tremor in essential tremor (ET). There are no published data on this topic, and the knowledge will guide future epidemiological investigations of this disorder. METHODS: These analyses utilized four distinct patient samples: a population-based study in northern Manhattan, a study of the environmental epidemiology of ET, a genetics study, and a brain repository. Sensitivity was the proportion of ET cases with head tremor on examination who self-reported head tremor. RESULTS: The sensitivity of the screening question for head tremor was lowest in the population-based study (31.6%), and higher as well as somewhat similar across the remaining studies (46.7 to 62.2%). Higher sensitivity was associated with tremor of longer duration, presence of voice tremor on examination, female gender, and lower education. The use of the screening question would have increased case ascertainment during the screening phase of these four studies by 1.9, 4.1, 10.2, and 20.3%. CONCLUSIONS: A screening question for head tremor had low-to-moderate sensitivity in ET. The use of such a screening questionnaire, however, has the potential to increase case ascertainment by as much as 20% in some screening settings.
Authors: Rachel Babij; Michelle Lee; Etty Cortés; Jean-Paul G Vonsattel; Phyllis L Faust; Elan D Louis Journal: Brain Date: 2013-09-12 Impact factor: 13.501
Authors: Monica Machón; Larraitz Arriola; Nerea Larrañaga; Pilar Amiano; Concepción Moreno-Iribas; Antonio Agudo; Eva Ardanaz; Aurelio Barricarte; Genevieve Buckland; Ma Dolores Chirlaque; Diana Gavrila; José María Huerta; Carmen Martínez; Esther Molina; Carmen Navarro; José Ramón Quiros; Laudina Rodríguez; María José Sanchez; Carlos Alberto González; Miren Dorronsoro Journal: J Epidemiol Community Health Date: 2012-05-10 Impact factor: 3.710