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PubMed2004

The sensitivity of Medicare billing claims data for monitoring mammography use by elderly women.

Mammography use is monitored through Medicare billing claims; however, the sensitivity of this data source has not been previously described. This study included 10,852 Colorado women ages 65 and older with a mammogram in 1998 as registered by the Colorado Mammography Project who were Medicare fee-for-service (FFS) enrollees. These records were matched to Medicare billing data to assess the proportion of those mammograms submitted for payment to Medicare. The overall sensitivity of the FFS Medicare billing data for screening mammography was 85 percent. Medicare billing claims were less sensitive for younger women, African Americans, women with some college education, and women with supplementary private insurance. In Colorado, the Medicare FFS billing claims understates mammography usage by 15 percent. Care must be taken when comparing mammography use derived from Medicare billing claims, as the sensitivity of billing data can vary substantially by age, race, and socioeconomic status.

Aged↗
PubMed2006

Knowledge about breast cancer and participation in a faith-based breast cancer program and other predictors of mammography screening among African American women and Latinas.

This article assessed the impact of knowledge of breast cancer and type and intensity of participation in a church-based breast cancer education program and other factors on mammography screening among African Americans and Latinas. Logistic regression was used to assess the impact of these factors on self-reported mammography utilization. Passive participation in church-sponsored activities, measured by breast cancer information that was heard, seen, or read, was found to be significantly associated with the likelihood of mammography use among African Americans. Moreover, African Americans who reported hearing, seeing, or reading about mammograms at their churches four or more times were 15 times more likely to report mammography use within the past year than were those who encountered information only once. Messages from pastors and church bulletin announcements were the most significant predictors. An increase in knowledge was not associated with higher mammography use. For Latinas, none of the hypothesized knowledge or participation variables was found to be significant. The results suggest that faith-based breast cancer programs can be effective by adopting tailored strategies to raise awareness about the importance of early detection.

Adult↗
PubMed2005

Spatial and spectral information in optical mammography.

This article reviews our research activities in the area of optical mammography and relates them to the historical developments and the current state and trends in the field. The guiding threads for this article are the roles played in optical mammography by spatial and spectral information. The first feature, spatial information, is limited by the diffusive nature of light propagation but can take advantage of the exceptionally high optical contrast featured by blood vessels and blood-rich areas in the breast. We describe a method to correct for edge effects, a spatial second-derivative algorithm, and a two-dimensional phased-array approach that enhance the image contrast, the spatial resolution, and the depth discrimination in optical mammograms. The second feature, spectral information, is the most powerful and unique capability of optical mammography, and allows for functional measurements associated with hemoglobin concentration and oxygenation, water concentration, lipids content, and the wavelength dependence of tissue scattering. We present oxygenation-index images obtained from multi-wavelength optical data that point to the diagnostic potential of oxygenation information in optical mammography. The optimization of the spatial and spectral information in optical mammography has the potential to create a role for this imaging modality in the detection and monitoring of breast cancer.

Breast Neoplasms↗
PubMed2005

Scanning time-domain optical mammography: detection and characterization of breast tumors in vivo.

Optical mammography is one of several new techniques for breast cancer detection and characterization presently under development for clinical use that provide information other than morphologic, in particular on the biochemical and metabolic state of normal and diseased tissue. In breast tissue, scattering of red to near infrared (NIR) light dominates absorption and NIR light may penetrate several centimeters through the breast. Optical mammography avoids the use of ionizing radiation and offers the power of diffuse optical spectroscopy. However, because of strong light scattering, spatial resolution of optical mammography is generally low. The paper reviews the results of a clinical study on scanning time-domain optical mammography comprising 154 patients carrying a total of 102 carcinomas validated by histology. Ninety two of these tumors were detected in optical mammograms retrospectively and for 87 of the detected tumors optical properties and tissue parameters were derived. In addition developments on instrumentation and data analysis are covered and possible improvements of optical mammography are briefly discussed.

Breast Neoplasms↗
PubMed2002

Impact of false-positive mammography on subsequent screening attendance and risk of cancer.

BACKGROUND: One area of concern within the largely successful UK National Health Service breast screening programme is the relatively high proportion of women showing mammographic abnormalities who undergo further diagnostic tests that prove negative. Previous studies suggest that, in addition to increasing anxiety, such false-positive mammography is associated with increased risk of subsequent interval cancer. In the present article, we quantify this increased risk, investigate whether it extends to cancers detected at rescreening, and determine whether cancers differ between women who have, and have not, experienced false-positive mammography. METHODS: This was a retrospective cohort study of 140,387 women aged 49-63 years routinely invited for first screening by the East Anglian National Health Service breast screening programme. Proportions reattending, and subsequent risk and pathological attributes of cancer were compared between women who underwent further (negative) assessment following false-positive mammography and women mammographically normal at first screen. RESULTS: At first screen, 108,617 (91.9%) of the screened women were mammographically normal, 4278 (3.6%) were assessed and then judged normal, and 514 (0.4%) underwent benign biopsy. Compared with nonassessed normal women, reattendance was lower among assessed women: 83.1% (95% confidence interval [CI], 82.0-84.1) versus 85.7% (95% CI, 85.5-85.9) (odds ratio [OR], 0.82; 95% CI, 0.76-0.89). Assessed women were at greater risk of interval cancer (rate per 1000 women screened, 9.6 [95% CI, 6.8-12.4] versus 3.0 [95% CI, 2.7-3.4]; OR, 3.19 [95% CI, 2.34-4.35]), and also of cancer detected at second screen (rate per 1000, 8.4 [95% CI, 5.8-10.9] versus 3.9 [95% CI, 3.5-4.3]; OR, 2.15 [95% CI, 1.55-2.98]). More cancers in assessed women measured >or = 20 mm (OR, 1.59; 95% CI, 0.99-2.55). CONCLUSIONS: Women undergoing false-positive mammography at first screen were less likely to reattend for subsequent screens than were nonassessed women, yet they were more likely to develop interval cancers or cancers at second screen, and their cancers were larger. Factors predisposing for false-positive mammography require investigation. Women should be encouraged to continue with screening.

Breast↗
PubMed2006

Claiming health: mammography screening decision making of African American women.

PURPOSE/OBJECTIVES: To develop a substantive theory that explains how African American women aged 50 years and older of different socioeconomic status (SES) make decisions about mammography screening. DESIGN: Qualitative, grounded theory. SETTING: Churches, places of employment, or women's homes in a large city in Ohio. SAMPLE: 30 women aged 52-72 years; 16 in the initial sample and 14 in the theoretical sample. METHODS: Audiotaped interviews and extensive written field notes; interviews were transcribed verbatim and analyzed using the constant comparison method, resulting in saturation of data. MAIN RESEARCH VARIABLES: Decision-making processes explaining mammography screening. FINDINGS: "Claiming health" emerged as the substantive theory explaining decisions that affect mammography screening and was embedded in the social contexts of cultural heritage and learned kinship values, religious beliefs and supports, and prior negative experiences with healthcare professionals and the healthcare system. Claiming health involved sisterhood and fellowship relationships fostered in the church. Claiming health was differentiated by age and SES, with older women of lower SES reporting greater reliance on cultural heritage and negative recollections of the healthcare system when making decisions regarding mammography. Each subconcept of claiming health was equally important and influenced decision making. CONCLUSIONS: Oncology nurses can benefit from the information presented by assisting older women of lower SES who may have encountered negative experiences in the healthcare system to develop effective assertiveness and communication skills when interacting with healthcare professionals. IMPLICATIONS FOR NURSING: Further research is needed to determine whether claiming health is a way of thinking about health generally or is used solely to explain experiences with mammography screening.

Black or African American↗
PubMed2006

Using structured debate to teach a controversial topic: mammography for women in their 40s.

BACKGROUND: Screening mammography for women in their 40s is controversial, and counseling patients about it can be challenging. Debate is an educational tool that lends itself to teaching about controversial topics and improving communication skills but is underused in medical education. PURPOSE: The purpose of this intervention was to improve residents' willingness to discuss mammography with patients. METHODS: Second-year internal medicine residents participated in a 3-hr structured debate on screening mammography for women in their 40s. The intervention's effect was measured using pretest and posttest questionnaires. RESULTS: A total of 33 residents participated in 6 debates between January and June of 2003. Comparison of pretest and posttest questionnaires showed that participants became more comfortable discussing mammography screening and were more likely to discuss it with their patients after the debate. CONCLUSIONS: A structured debate resulted in residents reporting increased comfort level and willingness to discuss mammography with women in their 40s.

Adult↗
PubMed2005

Primary care providers' concerns and recommendations regarding mammography screening for older women.

BACKGROUND: Morbidity and mortality from breast cancer increase with age; however, mammography screening does not reflect this increased risk for older women. Lack of provider recommendation is a major barrier to screening. METHODS: This is a descriptive study of mammography screening recommendations of community primary care providers in North Carolina (N = 96) participating in a National Cancer Institute funded research project. Providers self-reported screening recommendations for typical patients of different ages and issues and concerns that might influence the decision. Chart reviews compared actual practices with policies stated. RESULTS: Of the providers, 51% recommended biannual, 45% annual for women ages 50 through 74; 4% recommended biannual, 80% annual, 5% did not recommend screening, and 10% had no general policy for women over 75. Cost, inconsistent guidelines, comorbidity, functional status, value of mammography, and patient resistance influenced screening recommendations. Chart review showed even lower rates of recommendation than self-reported figures. CONCLUSIONS: Although the use of screening mammography has increased over the past decade, older women are one of the last subgroups to derive benefit from this screening test. Our survey revealed lower rates for mammography referral in older women. The primary care provider appears to be essential to increasing participation for these older women in breast cancer screening.

Adult↗
PubMed2005

Increasing mammography screening through inpatient education.

BACKGROUND: The reasons why women do not undergo regular screening mammograms have not been clearly defined. In this study, we addressed an educational intervention based on Health Belief Model constructs for 3 of the most common reasons why women do not participate in mammography screening: cost, fear, and lack of knowledge. The purpose of the project was to study whether an educational intervention addressing these factors could increase mammography screening among age-appropriate women who had not had a recommended mammogram within the previous 12 months. METHODS: The educational intervention consisted of providing a tailored brochure addressing either the barrier of (1) cost, (2) fear, or (3) lack of information. Participants were hospital inpatients admitted for noncancer diagnoses. They were followed up approximately 3 months after hospital discharge to ascertain subsequent mammography utilization either before or after leaving the hospital. RESULTS: Of the 272 women originally interviewed, 147 (54%) were reached for follow-up. Although there were no differences related to which mammography barrier was addressed, 42 (28.6%) reported that they had obtained a mammogram after the intervention. CONCLUSIONS: These data suggest that a fairly simple, low-cost patient education intervention of brochure distribution can produce substantially increased patient awareness and consequent mammography utilization.

Adult↗
PubMed2005

Smoking status and mammography among women aged 50-75 in the 2002 behavioral risk factor surveillance system.

BACKGROUND: Since the late 1980's, data show an association between smoking status and mammography. Women smokers reported 12-15% lower rates than non-smokers. This study investigated whether an association persists in a recent national-level database. METHODS: The sample was women aged 50-75 years from the 2002 Behavioral Risk Factor Surveillance System (N = 52,300). Analyses used two definitions of recent mammography, one based on a one-year interval between exams, the other on a two-year interval. Smoking was classified as current, former, or never. Other covariates included sociodemographic variables, health practices, insurance status and usual source of care. RESULTS: The rate of mammography for current smokers was 16% lower than for never smokers for the past-year interval, and 14.0% lower for the two-year interval. Multiple logistic regression supported the smoking/mammography association. Other covariates associated with lower mammography on both dependent variables were recent Pap test, health insurance/usual source of care, recent dental visit, seat belt use, marital status and age. CONCLUSIONS: Reasons for the persistent association between smoking and mammography must be determined. These variables will inform interventions with women who smoke. A key question is whether to intervene on smoking directly or whether mediating variables are sufficient targets of intervention.

Aged↗
PubMed2004

Are women with self-reported cognitive limitations at risk for underutilization of mammography?

Functional limitations (namely, limitations in activities of daily living and instrumental activities of daily living) have previously been demonstrated to exert a negative influence on mammography utilization. This study examines self-reported cognitive limitation in addition to sociodemographic, functional, and other health-related factors to determine their relationship with self-reported mammography use in the previous year. Data from the 1998 National Health Interview Survey was analyzed for 6,053 women, ages 50 years and older. Just over 44% of women with self-reported cognitive impairment (n = 351) reported a mammogram in the previous year, compared with 55% of unimpaired women (n = 5,702). Logistic regression analysis indicates that the presence of a cognitive limitation significantly reduced the likelihood of a mammography in the previous year (p < 0.05) after controlling for other sociodemographic, functional, and health-related factors. Women with self-reported cognitive limitations were 30% less likely than unimpaired women to utilize mammography after controlling for various forms of disability and other factors. Thus, women with cognitive impairments may be at risk for underutilization of mammography and therefore at risk for later-stage breast cancer diagnoses.

Activities of Daily Living↗
PubMed2005

Volume of screening mammography and performance in the Quebec population-based Breast Cancer Screening Program.

BACKGROUND: In the Quebec Breast Cancer Screening Program (Programme quebecois de depistage du cancer du sein [PQDCS]), radiologists' and facilities' volumes of screening mammography vary considerably. We examined the relation of screening-mammography volume to rates of breast cancer detection and false-positive readings in the PQDCS. METHODS: The study population included 307,314 asymptomatic women aged 50-69 years screened during 1998-2000. Breast cancer detection rates were analyzed by comparing all women with screening-detected breast cancer (n = 1709) and a 10% random sample of those without (n = 30,560). False-positive rates were analyzed by comparing the 3159 women with false-positive readings and the 27,401 others in the 10% random sample. Characteristics of participants, radiologists and facilities were obtained from the PQDCS information system. Data were analyzed by means of logistic regression. RESULTS: The rate of breast cancer detection appeared to be unrelated to the radiologist's screening-mammography volume but increased with the facility's screening-mammography volume. The breast cancer detection rate ratio for facilities performing 4000 or more screenings per year, compared with those performing fewer than 2000, was 1.28 (95% confidence interval [CI] 1.07-1.52). In contrast, the frequency of false-positive readings was unrelated to the facility's screening volume but was inversely related to the radiologist's screening volume: the rate ratio for readers of 1500 or more screenings per year compared with those reading fewer than 250 was 0.53 (95% CI 0.35-0.79). INTERPRETATION: Radiologists' and facilities' caseloads showed independent and complementary associations with performance of screening mammography in the PQDCS. Radiologists who worked in larger facilities and read more screening mammograms had higher breast cancer detection rates while maintaining lower false-positive rates.

Aged↗
PubMed2004

Evaluation of the rupture of silicone breast implants by mammography, ultrasonography and magnetic resonance imaging in asymptomatic patients: correlation with surgical findings.

CONTEXT: Different imaging methods can identify the integrity of breast implants and also the extent of possible silicone leakage. Mammography, ultrasonography and magnetic resonance imaging are often used to evaluate the integrity of breast implants, usually in patients that are symptomatic for rupture. A group of clinically asymptomatic patients was taken as a sample. These patients wanted to remove or change their breast implants for psychological or cosmetic reasons. OBJECTIVE: The purpose of this study was to compare the efficacy of mammography, sonography and magnetic resonance imaging in the detection of breast implant rupture in an asymptomatic population. TYPE OF STUDY: Prospective study. SETTING: Department of Diagnostic Imaging, Universidade de São Paulo, São Paulo, Brazil. METHODS: The participants were 44 asymptomatic patients who subsequently had implants surgically removed. Eighty-three implants were evaluated by both film-screen mammography and high-resolution sonography and 77 implants were evaluated by magnetic resonance imaging. The sensitivity and specificity of mammography, ultrasonography and magnetic resonance imaging were assessed using predetermined diagnostic criteria for implant rupture. All radiological signs were discussed and false positives and false negatives were retrospectively evaluated to identify the pitfalls in the investigations. RESULTS: The respective sensitivity and specificity of mammography were 20% and 89%; sonography, 30% and 81%; and magnetic resonance imaging, 64% and 77%. The differences between patients with breast implants for cosmetic and oncological reasons were discussed. CONCLUSIONS: Our experience suggests that magnetic resonance imaging seems to be the best imaging method on its own for the evaluation of rupturing among asymptomatic patients.

Breast Diseases↗
PubMed2002

Enhanced neoplastic transformation by mammography X rays relative to 200 kVp X rays: indication for a strong dependence on photon energy of the RBE(M) for various end points.

The fundamental assumption implicit in the use of the atomic bomb survivor data to derive risk estimates is that the gamma rays of Hiroshima and Nagasaki are considered to have biological efficiencies equal to those of other low-LET radiations up to 10 keV/microm, including mammography X rays. Microdosimetric and radiobiological data contradict this assumption. It is therefore of scientific and public interest to evaluate the efficiency of mammography X rays (25-30 kVp) to induce cancer. In this study, the efficiency of mammography X rays relative to 200 kVp X rays to induce neoplastic cell transformation was evaluated using cells of a human hybrid cell line (CGL1). For both radiations, a linear-quadratic dose-effect relationship was observed for neoplastic transformation of CGL1 cells; there was a strong linear component for the 29 kVp X rays. The RBE(M) of mammography X rays relative to 200 kVp X rays was determined to be about 4 for doses < or = 0.5 Gy. A comparison of the electron fluences for both X rays provides strong evidence that electrons with energies of < or = 15 keV can induce neoplastic transformation of CGL1 cells. Both the data available in the literature and the results of the present study strongly suggest an increase of RBE(M) for carcinogenesis in animals, neoplastic cell transformation, and clastogenic effects with decreasing photon energy or increasing LET to an RBE(M) approximately 8 for mammography X rays relative to 60Co gamma rays.

Animals↗
PubMed2005

The influence of breast self-examination on subsequent mammography participation.

OBJECTIVES: We evaluated whether breast self-examination (BSE) influences subsequent mammography participation. METHODS: We evaluated associations between BSE and subsequent mammography participation, adjusting for baseline screening behaviors and sociodemographic, health, and lifestyle characteristics, among women aged 40 years and older using data from the longitudinal Canadian National Population Health Survey. RESULTS: Regular performance of BSE at baseline was not associated with receipt of a recent mammogram at follow-up among all women (adjusted odds ratio [OR]=1.01; 95% confidence interval [CI]= 0.75, 1.35) or with mammography uptake among the subgroup of women reporting never use at baseline (adjusted OR=0.78; 95% CI=0.50, 1.22). CONCLUSIONS: The lack of association between performance of BSE and subsequent mammography participation suggests that not recommending BSE is unlikely to influence mammography participation.

Adult↗
PubMed1994

The use of mammography vans by low-income women: the accuracy of self-reports.

The objective of this study was to determine the accuracy of self-reports of mammography use by low-income income women. Mammography van records were used to verify self-reports of mammography use in the past year by women aged 50 through 75 years who had visited five community health centers (n = 237). Van records verified mammography use for 99% of these women (82% within the previous year and 98% within the past 2 years). Forty percent of those with van records who reported both the month and year of the mammogram were accurate. Inaccurately reported dates were more frequently after (74%) rather than before (26%) the actual date. These findings indicate that self-reports of mammography use by low-income women are generally reliable.

Aged↗
PubMed1994

Changes in the use of screening mammography: evidence from the 1987 and 1990 National Health Interview Surveys.

OBJECTIVES: Mammography rates reported by women in the National Health Interview Surveys of 1990 and 1987 are examined. Why this screening modality is not more frequently used is explored. METHODS: Data from the 1987 and 1990 National Health Interview Surveys, conducted by the National Center for Health Statistics, are cross-tabulated and compared. RESULTS: In 1987, approximately 17% of women over 40 years of age reported having had a screening mammogram in the previous year. In 1990, the rate doubled. Race declined in importance; income and education remained strong, positive predictors of screening. CONCLUSIONS: Despite this dramatic increase, two thirds of women are not having screening mammograms. Use was not higher primarily because women did not realize that screening mammography tests for breast cancer in asymptomatic women. Primary care physicians are the main source of health education for screening mammography. The data suggest that public health programs to promote screening mammography should especially target primary care physicians and women with low incomes and education. Likewise, health care providers should ensure that their patients are referred to facilities that deliver high-quality mammography at low cost to make the procedure more accessible.

Adult↗
PubMed1998

An ecological study of the effectiveness of mammography in reducing breast cancer mortality.

OBJECTIVES: The purpose of this study was to determine the relation of screening mammography to breast cancer incidence and case fatality. METHODS: In a sample of White female Medicare beneficiaries hospitalized in 1990-1991, age-adjusted breast cancer incidence and 2-year case fatality rates were estimated and compared with the frequency of mammographic screening from a population-based survey. RESULTS: The average rates for incidence, case fatality, and mammography within 5 years in 29 states were 414/100,000, 18.8%, and 59.2%, respectively. There was a positive state-level correlation between mammography rates and incidence and an inverse correlation between mammography and case fatality. CONCLUSIONS: High screening mammography rates in some states are associated with reduced breast cancer case fatality rates, presumably as a result of diagnosis of earlier stage cancers.

Aged↗