[Health survey in Campinas, São Paulo State, Brazil (ISACamp): comparison of estimates according to ownership of a residential telephone line].
The study assesses differences in socio-demographic, lifestyle, and health-related characteristics among adults with and without residential telephone lines using data from a health survey in Campinas, São Paulo State, Brazil, (2008-2009), through a population-based cross-sectional survey that included 2,637 adults (18 years and older). Descriptive statistics, chi-square tests, prevalence, and 95% confidence intervals were used in the analysis. Estimates were also made of the bias associated with non-coverage of the population without telephones before and after adjusting for post-stratification. The impact of bias on the confidence intervals was assessed by the bias ratio. Some 76% of respondents owned residential telephone lines. Except for marital status, differences were observed in socio-demographic data according to ownership of residential telephones. After post-stratification adjustment, there was a decrease in bias estimates for variables associated with ownership of telephone lines. However, except for osteoporosis, post-stratification adjustment was insufficient to correct the non-coverage bias.
Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, Brasil. primaria@fcm.unicamp.br
Priscila Maria Stolses Bergamo
PM
Francisco
Marilisa Berti de Azevedo
MB
Barros
Neuber José
NJ
Segri
Chester Luiz Galvão
CL
Cesar
Maria Cecilia Goi Porto
MC
Alves
D000293:Adolescent; D000328:Adult; D001938:Brazil / Q000453:epidemiology; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data*; D006306:Health Surveys / Q000706:statistics & numerical data*; D006801:Humans; D008019:Life Style; D008297:Male; D010067:Ownership; D015995:Prevalence; D012959:Socioeconomic Factors; D013689:Telephone / Q000706:statistics & numerical data