Linhas telefônicas residenciais: uso em inquéritos epidemiológicos no Brasil / Telephone surveys: its use in epidemiologic investigation in Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Objectives: To study the possibilities to use sampling frame of telephone interview the implementation of survey sampling. To describe the presence of potential biases associated to with coverage rates of telephone surveys in the main variables that usually compose the information core of epidemiological investigations. Methods: From database of the National Household Sample Survey (PNAD) in the period between 1998 and 2003, except for 2000, the averages and proportions were estimated by a 95% confidence interval. In the statistics analysis , the complex sampling plan was considered. Results: In Brazil, it has been there was a 50% increase in the households served by telephone, during the studied period. However, this evolution did not occur in a uniform way. Different profiles of telephone users were identified, and the main characteristics were related to education, race, the health plans and the geographic location. The regions with low telephone coverage may introduce bias on the estimates of prevalence of chronic diseases. Conclusion: The use of telephone survey for the conduction of interviews during epidemiologic investigations could be suitable to be feasible for the federal units with coverage rates above 70%.

ASSUNTO(S)

método randon digital dialing survey sampling method randon digital dialing sampling frame of telephone interview inquérito por amostragem taxa de cobertura de linhas telefônicas inquérito por telefone telephone survey cadastro de telefones profiles of telephone users coverage rates of telephone surveys perfil do usuário de linhas telefônicas

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