For mammography, a woman 40 years of age or older must have reported having at least one mammography in her life. Furthermore, she should have had the most recent one within the last two years by the time of interview.
The mammography prevalence questions were asked in BRFSS in 1997, 1998, 1999, 2000, and the even years after 2000 as part of the core questionnaire for all states, and in NHIS in 1998, 1999, 2000, 2003, 2005, 2008, and 2010. The questions were worded in similar ways on the two surveys, except that for the time since most recent mammogram question, NHIS asked for exact year, date or time period while BRFSS only asked for time period.
Available estimates are for the time periods 1997-1999, 2000-2003, 2004-2007, and 2008-2010 and on maps and in data tables by county (except counties in Alaska), health service area (HSA) and state. The most recent estimates (2008-2010) are also released in State Cancer Profiles. Click on the map to view data values and confidence intervals for individual regions.
We included women aged 40+ for these estimates, as 40+ was the recommended range for mammography study in the past. We could consider 50+ in future work.
Common Quantiles are calculated by pooling all years of data for the same outcome, geography and sex groupings. Use common quantiles to better show changes across different years for the same outcome compared to using quantiles calculated based on individual year's data.
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