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PubMed2001

Evaluation of preventive technologies in Germany: case studies of mammography, prostate cancer screening, and fetal ultrasound.

OBJECTIVE: In this article, three preventive strategies-mammography screening for breast cancer, PSA screening for prostate cancer, and routine ultrasound in normal pregnancy-are discussed in the context of German health care. METHODS: Epidemiologic data and German studies evaluating different aspects of these preventive measures were identified and analyzed. RESULTS: Only a few studies could be identified that investigate these preventive measures. Despite sufficient evidence, in part derived from a German study, there is not yet a mammography screening program. In contrast, ultrasound in pregnancy is offered routinely, although there are controversies regarding the benefit of this practice. PSA screening is not offered as part of the screening program for prostate cancer. However, PSA tests as well as mammographies are done in large numbers in German ambulatory care-a practice that could be considered wild or opportunistic screening. CONCLUSIONS: These case studies show that preventive programs and practices in Germany are not sufficiently based on sound evidence. The paucity of evaluation activities related to prevention in Germany is probably due to the low threshold to introduce new preventive programs into the German healthcare system in the past.

Adult↗
PubMed2002

Sociodemographic predictors of non-attendance at invitational mammography screening--a population-based register study (Sweden).

OBJECTIVE: To investigate the role of sociodemographic factors in predicting mammography uptake in an outreach screening program. METHODS: Linkage of data from a regional population-based mammography program with four Swedish nationwide registers: the Population and Housing Census of 1990, the Fertility Register, the Cancer Register, and the Cause of Death Register. We computed odds ratios (OR) and 95% confidence intervals (CI) for non-attendance by sociodemographic factors. Non-attendance was defined as failure to attend in response to the two most recent invitations. RESULTS: Multivariate analyses among 4198 non-attenders and 38,972 attenders revealed that both childless and high-parity women were more likely to be non-attenders (OR = 1.8, 95% CI: 1.6-2.0 and OR = 2.2, 95% CI: 1.8-2.7, respectively). Women living without a partner were less likely to attend (OR = 1.7, 95% CI: 1.5-1.9), as were non-employed women (OR = 2.1, 95% CI: 1.9-2.3). Those renting an apartment were more likely to be non-attenders compared with home-owners (OR = 1.8, 95% CI: 1.6-2.0), and immigrants from non-Nordic countries were more than twice as likely to be non-attenders compared with Swedish-born women (OR = 2.4, 95% CI: 2.0-2.8). CONCLUSIONS: There are identifiable subgroups in which mammography utilization can be increased. Special attention should be paid to women who have never attended, childless women, and non-Nordic immigrants.

Adult↗
PubMed1998

The Latina Breast Cancer Control Study, year one: factors predicting screening mammography utilization by urban Latina women in Massachusetts.

This study identifies factors associated with screening mammography utilization for Latina women age 40 and older in two Massachusetts cities, who are predominantly of Caribbean origin. It is a cross-sectional survey based on an area probability sample, using bilingual Latina interviewers. Sixty-one percent of the sample was Latina, 99% of whom were interviewed in Spanish. Ethnicity, educational attainment, and acculturation were unrelated to recent screening. While distinct healing traditions were found among some Latinas, their use was unrelated to screening. Higher fatalism scores had a bivariate association with lower probability of screening. In a logistic regression, predictors were having health insurance or access to free care; having discussed mammography with a physician in the past 2 years; the difference between 67 and respondent's age (negative coefficient); and city of residence. Having a regular source of care was a predictor when substituted for insurance status. Insurance status and age principally determine whether subjects are screened, mediated by access to physician services and whether physicians recommend screening. Results suggest that universal medical insurance, and efforts to influence physician practices, are key to promoting screening mammography among this population.

Adult↗
PubMed2003

Prospective association between distress and mammography utilization among women with a family history of breast cancer.

In this study we sought to evaluate the prospective association between psychological distress and mammography utilization among women with a family history of breast cancer. We evaluated the association of cancer worry, cancer-specific distress, and general distress with mammography utilization after controlling for potential confounders. The results revealed that 74% of our sample had obtained a mammogram within 12 months of the baseline assessment. Logistic regression models revealed that after controlling for potential confounding variables, cancer worry and general distress were independent predictors of mammography utilization. Specifically, women who reported higher levels of worry and/or distress at baseline were less likely to report having received a mammogram in the 12 months following the baseline assessment. These results are in contrast to the only other prospective study in this population. Additional research is needed to determine the prospective association between distress and adherence and to identify potential mechanisms for such an association.

Adult↗
PubMed2003

Mortality from breast carcinoma among US women: the role and implications of socio-economics, heterogeneous insurance, screening mammography, and geography.

Despite rapid advances in medicine and beneficial lifestyle changes, the incidence and mortality rate of gynecologic carcinoma remains high worldwide. This paper presents the econometric model findings of the major drivers of breast cancer mortality among US women. The results have implications for public health policy formulation on disease incidence and the drivers of mortality risks. The research methodology is a fixed-effects GLS regression model of breast cancer mortality in US females age 25 and above, using 1990-1997 time-series data pooled across 50 US states and DC. The covariates are age, years schooled, family income, 'screening' mammography, insurance coverage types, race, and US census region. The regressions have strong explanatory powers. Finding education and income to be significantly and positively correlated with mortality supports the 'life in the fast lanes' hypothesis of Phelps. The policy of raising a woman's education at a given income appears more beneficial than raising her income at a given education level. The relatively higher mortality rate for Blacks suggests implementing culturally appropriate set of disease prevention and health promotion programs and policies. Mortality differs across insurance types with Medicaid the worst suggesting need for program reform. Mortality is greater for women ages 25-44 years, females 40-49 years who have had screening mammography, smokers, and residents of some US states. These findings suggest imposing more effective tobacco use control policies (e.g., imposing a special tobacco tax on adult smokers), creating a more tractable screening mammography surveillance system, and designing region-specific programs to cut breast cancer mortality risks.

Adult↗
PubMed2005

[Participation in Swiss mammography screening programmes: key role of physicians].

Characteristics of first-round attendees and determinants of reattendance in the Swiss mammography screening pilot programme (1993-1998) were investigated. Data on socio-demographic features, health preventive behaviour and history, prior screening round and referring physicians' attributes were collected at initial attendance among women enrolled in 1993-1995. First-round participants (n = 4,162) were prospectively followed through next screening round. Determinants of reattendance (second-round attendance among first-round participants) were identified by multivariate logistic regression models. The reattendance rate was high (80%). Women most likely to reattend were urban, Swiss residents with a true-negative first-round screening result. The more intensive the initial recruitment efforts, the lesser were the odds of reattendance. Mammography screening prior to screening enrolment increased reattendance. Having a gynaecologist, a female and a younger doctor as a referring physician was positively associated with reattendance. Mammography screening attendance is not only influenced by women-related factors but also by structural factors, and thus requires a global approach. For strategies aimed at improving the impact of organised cancer screening programmes, understanding and quantification of determinants of (re)attendance are key elements to consider.

Aged↗
PubMed1993

Attributions of responsibility and persuasion: increasing mammography utilization among women over 40 with an internally oriented message.

One hundred ninety-seven women over 40 years old and not adhering to national guidelines for screening mammography viewed persuasive messages varying in attributional emphasis (internal, external, or information-only). Internal attributions of responsibility for health-promoting behavior were expected to motivate the greatest change in women's attitudes and behaviors in relation to breast cancer and mammography. Attitudes about breast cancer and mammography were measured immediately and 6 months after the presentation. Twelve months later, women who viewed the internal message were more likely to have obtained a screening mammogram than women assigned to the other 2 conditions. The attributions of responsibility encouraged by the persuasive messages were associated with whether viewing the presentation led to behavior change.

Adult↗
PubMed1993

Women's decision making about mammography: a replication of the relationship between stages of adoption and decisional balance.

The motivational and cognitive processes of behavior change in the area of screening mammography were investigated. A total of 676 women, 40 to 79 years old, were recruited for telephone interview through random selection from designated census tracts and were asked questions that assessed mammography stage-of-adoption and decisional balance constructs from the trans-theoretical model of behavior change. Two definitions of stage of adoption were used. Analysis of covariance showed that a history of regular screening and an intention to continue having the exam were associated with a more favorable decisional balance. Results replicated a prior investigation and demonstrated the usefulness of stage of adoption and decisional balance as guides for designing stage-matched interventions to increase rates of mammography.

Adult↗
PubMed1999

Specific worry about breast cancer predicts mammography use in women at risk for breast and ovarian cancer.

This longitudinal study examined predictors of mammography use among women with a family history of breast cancer participating in a risk assessment and surveillance program (N = 213). Assessed were background variables (age, prior mammography utilization), cognitive variables (perceived vulnerability), and affective variables (cancer worry and general distress). Results of logistic regression analyses predicting adherence 1 year after baseline contact, in which variables of prior utilization, feelings of vulnerability, and general distress were controlled for, indicated that cancer worry and age were significant predictors of mammography adherence. Results suggest that moderate levels of cancer worry facilitate, rather than undermine, adherence. The results have implications for the construction of educational messages that should be designed to acknowledge feelings of cancer-specific worry and to provide guidance in health protective behaviors.

Adult↗
PubMed2005

Matching health messages to monitor-blunter coping styles to motivate screening mammography.

This study examined whether providing messages matched to women's monitor-blunter coping styles is effective in encouraging mammography utilization. Female callers to a cancer information hotline were assessed at the end of their regular telephone call and classified as monitors or blunters. A randomly assigned message promoting mammography utilization, tailored for monitors or blunters, was delivered on the telephone, and a similarly tailored brochure and refrigerator magnet were mailed to participants immediately after their call. Women were telephoned 6 and 12 months later to determine whether they had obtained a mammogram. Messages matched to a woman's monitor-blunter coping style encouraged mammography after 6 months more effectively than mismatched messages and were significantly more effective for blunters but not for monitors.

Adaptation, Psychological↗
PubMed1998

The growth law of primary breast cancer as inferred from mammography screening trials data.

Despite considerable progress in understanding tumour development, the law of growth for human tumours is still a matter of some dispute. In this study, we used large-scale mammography screening trial data to deduce the growth law of primary breast cancer. We compared the empirical tumour population size distributions of primary breast cancer inferred from these data to the distributions that correspond to various possible theoretical growth functions. From this, we showed that the data are inconsistent with the exponential, logistic and Gompertz laws, but support power law growth (exponent approximately 0.5). This law indicates unbounded growth but with slowing mass-specific growth rate and doubling time. In the clinical size ranges, it implies a greater decline in the mass-specific growth rate than would be predicted by the Gompertz law using the accepted parameters. This suggests that large tumours would be less sensitive to cycle-specific therapies, and be better treated first by non-cell cycle-specific agents. We discussed the use of our study to estimate the sensitivity of mammography for the detection of small tumours. For example, we estimated that mammography is about 30% less sensitive in the detection of tumours in the 1 to 1.5-cm range than it is in detecting larger tumours.

Breast Neoplasms↗
PubMed2004

Mammography screening in the Netherlands: delay in the diagnosis of breast cancer after breast cancer screening.

In a prospective study we determined the frequency and causes of delay in the diagnosis of breast cancer after suspicious screening mammography. We included all women aged 50-75 years who underwent biennial screening mammography in the southern breast cancer screening region of the Netherlands between 1 January 1996 and 1 January 2002. Clinical data, breast imaging reports, biopsy results and breast surgery reports were collected of all women with a positive screening result with a minimum of 2-year follow-up. Of 153 969 mammographic screening examinations, 1615 (1.05%) were positive screens. Breast cancer was diagnosed in 770 (47.9%) of 1607 women for whom follow-up information was available, yielding a cancer detection rate of 5.0 per 1000 women screened. Breast cancer was diagnosed within 3 months following a positive screen in 722 cases (93.8%). The diagnostic delay was 4-6, 7-12 and 13-24 months, respectively, in 11 (1.4%), 24 (3.1%) and nine (1.2%) patients. In four other patients (0.5%), breast cancer was diagnosed after a repeat positive screen, resulting in a diagnostic delay of 25-27 months. Reasons for a diagnostic delay >3 months were erroneous mammographic interpretation of suspicious lesions as benign or probably benign lesions (33 cases), benign biopsies from a malignant lesion (10), and omission to biopsy or remove a lesion that was suspicious at breast imaging (4) or core biopsy (1). We conclude that there is room for improvement in the workup of patients with a positive screening mammography, as seen from data in this screening region. To improve the workup, we suggest that other breast cancer screening programmes also identify delay in breast cancer diagnosis after a positive screen.

Aged↗
PubMed2001

Mammography messages in popular media: implications for patient expectations and shared clinical decision-making.

OBJECTIVE: To examine the relationship between the quantity and content of information about mammography in popular magazines and the educational level of their target audience. DESIGN: Articles published in popular magazines from January 1988 through April 1994 in which >or= 25% of all readers were females >or= 35 years of age were identified (n=65). We used the proportion of readers who were college graduates to stratify the magazines into three education levels. We used a content analysis to assess the relationship between media messages about mammography and readers' education levels. RESULTS: Seventy-eight percent of lowest education level articles were categorized as persuasive or prescriptive compared with 28% of articles in the highest education level (P < 0.01). Only 26% of the lowest education level articles that discussed screening guidelines for women under 50 years of age considered the issue controversial, while 59% of the high education level articles considered it controversial (P < 0.01). CONCLUSION: Women with lower education levels received a clearly persuasive or prescriptive message urging mammography screening, while higher educated women received more balanced and informative messages. Such differences suggest that women may be entering their physicians' offices with very different sets of information from which to draw when faced with clinical decisions. Physicians and other health-care providers should be aware of these potential differences, and further research should be done to explore the relationship between women's preferences for participation in shared decision-making and the types of messages they are receiving from popular media.

Adult↗
PubMed2001

Pain during mammography: implications for breast screening programmes.

Pain experienced during mammography can deter women from attending for breast cancer screening. Review of the current literature on pain experienced during mammography reveals three main areas of interest: reports of the frequency of pain, identification of predictors of pain and strategies for responding to pain. Implications of this literature for breast screening programmes include the need for appropriate measurements of pain during mammography that are valid for screening populations, a further understanding of organizational factors involved in screening programmes that may be predictors of pain and for the development of valid strategies for responding to pain within breast screening programmes.

Adult↗
PubMed1999

Analysis of normal breast tissue and of solid breast masses using three-dimensional ultrasound mammography.

OBJECTIVES: To describe the appearance of normal breast tissue and breast masses with three-dimensional ultrasound mammography, and evaluate the contribution of this to the diagnosis of breast masses. MATERIALS AND METHODS: A total of 186 solid hypoechoic breast masses were analyzed with two- and three-dimensional ultrasonography. Three-dimensional planar reformatted sections were reconstructed along planes either orthogonal or parallel to the skin surface. RESULTS: With parallel planar reformatted sections all the masses tended to be round. Margins were clearly demonstrated. In case of carcinomas, circumferential jagging was present in the equatorial planes. In case of fibroadenomas, complete wall continuity of the mass was readily apparent. The hyperechoic bands of fibrous tissue peripheral to the masses appeared either as distinct from the central image (compressive pattern) or converged towards the hypoechoic central core of the mass, producing a stellar pattern (converging pattern). These two patterns were preferentially associated with benign lesions and carcinomas, respectively. Three-dimensional ultrasound mammography had higher specificity, but lower sensitivity, than two-dimensional ultrasound mammography. CONCLUSIONS: Three-dimensional reconstruction, in particular parallel planar reformatted sections, represents a valuable adjunct to the characterization of breast masses using ultrasongraphy. Further studies are necessary to assess the validity of the present findings, particularly with regard to the rarer, more unusual types of carcinoma.

Adult↗
PubMedDate not supplied

The role of the physician as an information source on mammography.

PURPOSE: The value of mammography for asymptomatic women younger than 50 years of age has been under debate, and it had been suggested that each woman should decide for herself whether to start having mammograms in her 40s. This decision-making process requires women to have knowledge of screening guidelines. This study reported key determining informational factors that led women age 40 and older to obtain a mammogram. DESCRIPTION OF STUDY: To examine the relationship between sources of information and utilization of mammography, the authors conducted a communitywide telephone survey, in English and Spanish, of a stratified random sample of 999 white, black, and Hispanic women in Dade County, Florida. The survey was designed to measure knowledge, attitudes, practices, and beliefs about breast cancer, its prevention, and its early detection. Data for 784 women 40 years and older are analyzed and reported here. RESULTS: The most commonly cited source of information was the media (90.2%). In a logistic regression, having had a checkup in the past year was the strongest predictor of having had a recent mammogram as opposed to a distant one (OR 4.17; 95% CI 2.92-5.95). Women who named their physician as an important source of information about health and prevention were also more likely to have had a recent examination (OR 1.85; 95% CI 1.27-2.69). CLINICAL IMPLICATIONS: This analysis of the relationship between the source of information and utilization of mammography suggests that physicians, as sources of information, serve to motivate women to obtain a mammogram. This is true even after taking into account the patient's age and utilization of the healthcare system for preventive care in general. For this reason, it is imperative that clinicians be aware of national guidelines for breast cancer screening; of the risks and benefits of screening measures; and of the implications of a positive and negative test result. In addition, clinicians must realize the importance of follow-up to remind the patient to obtain a mammogram or other screening test and should develop strategies to provide this service.

Adult↗
PubMed1997

The influence of knowledge and attitudes about breast cancer on mammography use among Latinas and Anglo women.

We conducted a telephone survey of randomly selected Latinas (n = 208) and Anglo women (n = 222) to determine predictors of mammography use. The cooperation rate was 78.5%. Relatively high proportions of Latinas (61%) and Anglo women (79%) reported mammography use within the past 2 years. A logistic regression analysis revealed that knowledge and attitudes did not independently predict use. On the other hand, having health insurance, being married, and being Latino were consistent independent predictors. We conclude that mammography use among Latinas and Anglo women is increasing. However, further gains in use must address difficult barriers such as lack of health insurance.

Adult↗
PubMed1998

Self-referral for screening mammography.

Patients can obtain screening mammograms without a physician's referral, leading to potential problems in clinical care. Because of the complexity of self-referral and the limitations of prior studies, we examined this phenomenon in a representative sample of mammography facilities. A questionnaire was given to all women obtaining mammograms at nine Connecticut mammography facilities during a 2-week period. Facilities included mobile sites, urban fixed sites, and rural fixed sites. Responses were categorized according to whether or not the woman had seen a primary care provider within the last year and whether or not she had received a recommendation to obtain a mammogram. The response rate was 62% (732 of 1,189), and the mean age of respondents was 58 years (range, 30-100 years). Self-referred women, defined as those without a recent visit to a primary care clinician and without a clinician's recommendation for a mammogram, constituted 6% of respondents. Self-referred women were significantly more likely to use mobile facilities (78% vs 33%, p < .01) and be under 50 years of age (44% vs 28%, p = .02) compared with provider-referred women who had recently seen their provider. We conclude that younger women are obtaining screening mammograms without clear evidence of having seen their primary care provider in the previous year or having received a referral from their provider. Self-referral is especially common at mobile mammography facilities. Further study is needed to assess the clinical impact of self-referral on mass screening programs.

Adult↗