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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Siegel, P.Z. et al.

Siegel, Qualters, Mowery, Campostrini, Leutzinger, McQueen,

Subgroup-specific effects of questionnaire wording on population-based estimates of mammography prevalence.

OBJECTIVES: This study investigated whether an apparent downturn in prevalence rates of mammography use reported in the 1992 Behavioral Risk Factor Surveillance System (BRFSS) questionnaire resulted from a change in questionnaire wording. METHODS: In a pretest-posttest design (1990-1991 vs 1992), piecewise linear regression analyses were based on monthly prevalence estimates of mammography use among female BRFSS respondents 40 years or older. RESULTS: Self-reported mammography use was lower by 3.5 percentage points (95% confidence interval [CI] = 1.5, 5.5) overall--and lower by 13.6 percentage points (95% CI = 2.6, 24.6) among Black women with less than a high school education--when predicted from 1992 data than when predicted from 1990-1991 data. CONCLUSIONS: A change in questionnaire wording in the BRFSS caused demographic-specific effects in population-based estimates of mammography use.[1]

References

Subgroup-specific effects of questionnaire wording on population-based estimates of mammography prevalence. Siegel, P.Z., Qualters, J.R., Mowery, P.D., Campostrini, S., Leutzinger, C., McQueen, D.V. American journal of public health. (2001) [Pubmed]

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