Modeling the dissemination of mammography in the United States.
ABSTRACT This paper presents a methodology for piecing together disparate data sources to obtain a comprehensive model for the use of mammography screening in the US population for the years 1975-2000.
Two aspects of mammography usage, the age that a woman receives her first mammography and the interval between subsequent mammograms, are modeled separately. The initial dissemination of mammography is based on cross-sectional self report data from national surveys and the interval length between screening exams is fit using longitudinal mammography registry data.
The two aspects of mammography usage are combined to simulate screening histories for individual women that are representative of the US population. Simulated mammography patterns for the years 1994-2000 were found to be similar to observed screening patterns from the state level mammography registry for Vermont.
The model presented gives insight into screening practices over time and provides an alternative public health measure for screening usage in the US population. The comprehensive description of mammography use from its introduction represents an important first step to understanding the impact of mammography on breast cancer incidence and mortality.
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ABSTRACT: To present common language for defining adherence of infrequent yet repeated health behaviors. We illustrate methodological and conceptual issues using human papillomavirus (HPV) vaccination and screening mammography study data as examples. Adherence rates of infrequent, repeated behaviors varied widely depending on how adherence was defined and measured. We advocate use of 3 standard definitions of adherence: initiation of behavior (initiation), adherence to most recent opportunity (on-schedule), and timely adherence across multiple opportunities (maintenance or completion). The proposed framework has cross-cutting implications for research and practice. Standardizing adherence metrics may facilitate comparisons across studies of health behaviors practiced at infrequent yet repeated intervals.American journal of health behavior 01/2010; 34(6):669-79. DOI:10.5993/AJHB.34.6.4 · 1.31 Impact Factor
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ABSTRACT: Breast cancer in women is a major health problem: each year, more than 1 million new cases are diagnosed worldwide. One in 8 women will be confronted with breast cancer during her lifetime. The objective of this review is to present an overview of the epide-miology of breast cancer i.e. the incidence and mortality rate of breast cancer. In other words, how often does breast cancer occur and how often it is lethal? The geographi-cal variation and the evolution over time are discussed -are we now doing better than 10 or 20 years ago? Possible ways of preventing breast cancer are also presented.