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ABSTRACT: BACKGROUND: Considerable efforts have been undertaken in the United States to reduce cervical cancer incidence and mortality by increasing screening; however, disparities in screening rates continue to exist among certain racial and ethnic minority groups. The objective of the current study was to determine the effectiveness of a lay health worker-delivered intervention-AMIGAS (Ayudando a las Mujeres con Informacion, Guia, y Amor para su Salud [helping women with information, guidance, and love for their health])-to increase Papanicolaou (Pap) test screening among 3 populations of women of Mexican origin. METHODS: Six hundred thirteen women of Mexican origin in 3 treatment sites were randomized among 4 study arms: the full AMIGAS program with a video and a flip chart (n = 151), the AMIGAS program without the video (n = 154), the AMIGAS program without the flip chart (n = 155), and a usual care control group (n = 153). Six months after enrollment, women were surveyed and reported whether or not they had been screened. RESULTS: Women in any of the intervention arms were statistically significantly more likely to report being screened than those in the usual care group in both an intent-to-treat analysis and a per-protocol analysis. In the intent-to-treat analysis, 25% of women in the control group and 52% in the full AMIGAS program group reported having had Pap tests (P < .001); in the per-protocol analysis, the percentages were 29% and 62%, respectively (P < .001). CONCLUSIONS: AMIGAS was effective in increasing Pap test screening among women of Mexican descent when used in a 1-to-1 setting. Future research should compare the 1-on-1 intervention with the group-based intervention. Cancer 2012. © 2012 American Cancer Society.
Cancer 12/2012; · 4.77 Impact Factor
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ABSTRACT: The study reported here examines factors influencing decision-making concerning health care access and navigation among persons of Mexican origin living along the U.S./Mexico border. Specifically, the study examined how persons with limited financial resources accessed these two systems. Seven focus groups were held with 52 low income Mexican American people aged 18-65 years. Transcripts were analyzed to identify themes in Atlasti 5.0 software and the theory used included a socio-ecological framework and complemented by constructed from the Social Cognitive Theory. We found that in addition to a lack of insurance and financial resources to pay for health care; fear, embarrassment and denial associated with a diagnosis of illness; poor medical personnel interactions, and desire for quality but streamlined health care also influenced decision making. This theory-based study raises important issues if health care is to improve the health and welfare of disadvantaged populations and points to the need for greater focus on medical homes and prevention and early intervention approaches.
Journal of Immigrant and Minority Health 09/2012; · 1.16 Impact Factor
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ABSTRACT: Community health workers (CHWs) are increasingly being incorporated into health programs because they are assumed to effectively deliver health messages in a culturally relevant manner to disenfranchised communities. Nevertheless, the role of CHWs-who they are, what they do, and how they do it-is tremendously varied. This variability presents a number of challenges for conducting research to determine the effectiveness of CHW programs, and translating research into practice. We discuss some of these challenges and provide examples from our experience working with CHWs. We call for future research to identify the "core elements" of effective CHW programs that improve the health and well-being of disenfranchised communities.
American Journal of Public Health 07/2012; 102(9):1633-7. · 3.93 Impact Factor
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ABSTRACT: Cervical cancer is preventable with treatment of precancerous lesions and treatable at early stages. Hispanics have higher rates of cervical cancer and lower rates of screening. Ayndando a las Mujeres con Informaccion, Guia, y Amor para su Salud (AMIGAS) is an intervention to increase cervical cancer screening in U.S. women of Mexican origin. AMIGAS was developed with the participation of the community using intervention mapping (IM). Following the IM process, the authors completed a needs assessment, development of program objectives, selection of intervention methods and strategies, and program design. A benefit of IM is its linkage with community-based participatory research as it includes engagement of community members to identify and refine priority areas. The success of this strategy suggests it a useful tool for other populations. The resulting intervention program is currently being tested for efficacy and cost-effectiveness in three sites: El Paso, Texas; Houston, Texas; and Yakima, Washington.
Health Education & Behavior 03/2012; 39(5):603-11. · 1.54 Impact Factor
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ABSTRACT: To reduce disparities in breast and cervical cancer in the U.S., it is essential that programs such as CDC's National Breast and Cervical Cancer Early Detection Program (NBCCEDP) use evidence-based strategies. Recommendations for interventions to increase breast and cervical cancer screening have been disseminated by national public health organizations. To increase screening, cancer control planners would benefit from use of evidence-based strategies for recruitment of participants in their communities.
The purpose of the study was to inventory recruitment activities for cancer screening within NBCCEDP programs and assess if activities used to increase cancer screening are evidence-based.
Interviews were conducted with 61 recruitment coordinators in 2008 to elicit their recruitment activities, use of evidence-based resources, and barriers to using evidence-based interventions (EBIs). Study data were analyzed in 2009.
Of the 340 activities reported, many were categorized as educational materials, one-on-one education, mass media, group education, and special events. Two thirds of inventoried activities matched an EBI. Coordinators reported that colleagues and the CDC are their primary sources of information about EBIs and few coordinators had used evidence-based resources. Lack of money or funding, questionable applicability to priority populations, limited staffing or staff time, and insufficient evidence-based research were the most important barriers to EBI use.
Although the majority of NBCCEDP recruitment activities were evidence-based, one third were not. Additional training and technical assistance are recommended to help public health agencies adopt the use of these strategies.
American journal of preventive medicine 03/2012; 42(3):235-41. · 4.24 Impact Factor
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Matthew W Kreuter, Maria E Fernandez,
Melissa Brown,
Ludmila Cofta-Woerpel,
Debbie Pfeiffer,
Brandie Adams-Piphus,
Hope Krebill,
Dora Alicia Gonzalez,
Daisy Morales Campos,
Ginny Thompson Kirklin,
Sarah Betsworth,
Chris Casey,
Doug Luke
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ABSTRACT: This study tested the feasibility of promoting 1-800-4-CANCER through partnerships with organizations serving African American and Hispanic communities. Small-media and client reminders about human papillomavirus vaccination were made available through local agents to 28 community organizations. Organizations ordered 79 932 resources and distributed them to young women and parents of girls-;African Americans in St Louis, Missouri, and Hispanics in the Lower Rio Grande Valley of Texas. Pre- to postintervention calls to 1-800-4-CANCER increased 38% in these communities, while declining 15% in comparison communities of Kansas City, Missouri, and El Paso, Texas (F = 8.6, P = .004) and 1.4% in the United States as a whole.
Family & community health 01/2012; 35(1):15-30. · 0.99 Impact Factor
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ABSTRACT: Computer-based multimedia technologies can be used to tailor health messages, but promotoras (Spanish-speaking community health workers) rarely use these tools. Promotoras delivered health messages about colorectal cancer screening to medically underserved Latinos in South Texas using two small media formats: a "low-tech" format (flipchart and video) and a "high-tech" format consisting of a tailored, interactive computer program delivered on a tablet computer. Using qualitative methods, the authors observed promotora training and intervention delivery and conducted interviews with five promotoras to compare and contrast program implementation of both formats. The authors discuss the ways each format aided or challenged promotoras' intervention delivery. Findings reveal that some aspects of both formats enhanced intervention delivery by tapping into Latino health communication preferences and facilitating interpersonal communication, whereas other aspects hindered intervention delivery. This study contributes to our understanding of how community health workers use low- and high-tech small media formats when delivering health messages to Latinos.
Health Education & Behavior 10/2011; 39(3):352-63. · 1.54 Impact Factor
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ABSTRACT: Many studies have been conducted to understand what factors are associated with human papillomavirus (HPV) vaccine acceptability and completion of the 3-dose vaccination series, but few have examined whether people understand the survey items used to assess these relationships. Through a multisite collaborative effort, we developed and cognitively tested survey items that represent constructs known to affect vaccine acceptability and completion.
Investigators from 7 research centers in the United States used cognitive interviewing techniques and in-person and telephone interviews to test 21 items. Four rounds of testing, revising, and retesting were conducted among racially and ethnically diverse parents (n = 62) of girls between the ages of 9 and 17 years.
The final survey contained 20 items on attitudes and beliefs relevant to HPV vaccine. Some parents misinterpreted statements about hypothetical vaccine harms as statements of fact. Others were unwilling to answer items about perceived disease likelihood and perceived vaccine effectiveness, because they said the items seemed to have a "right" answer that they did not know. On the basis of these and other findings from cognitive testing, we revised the wording of 14 questions to improve clarity and comprehension. We also revised instructions, response options, and item order.
Cognitive testing of HPV vaccine survey items revealed important differences between intended and ascribed item meaning by participants. Use of the tested survey questions presented here may increase measurement validity and researchers' ability to compare findings across studies and populations. Additional testing using quantitative methods can help to further validate these items.
Journal of Lower Genital Tract Disease 09/2011; 16(1):16-23. · 1.07 Impact Factor
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ABSTRACT: We assessed the association between diabetes and breast cancer and whether physical activity modified the effect of diabetes on breast cancer in Hispanic women.
We used data from a case-control study of breast cancer among Hispanic women aged 30-79 conducted between 2003 and 2008 on the Texas-Mexico border. In-person interviews were completed with 190 incident breast cancer cases ascertained through surgeons and oncologists, and 979 controls who were designated as both high-risk (n=511) and low-risk (N=468) for breast cancer (with respective response rates of 97%, 83% and 74%).
After adjustment for menopausal status and mammography screening, there was no effect of diabetes on breast cancer risk (high-risk control group odds ratio [OR] 1.02, 95% confidence interval [CI] 0.71-1.48; low-risk control group OR 0.87, 0.58-1.30). Women who had a diabetes history and did not exercise were at no risk of breast cancer (OR 0.96, 95% CI 0.63-1.48) or a slightly reduced breast cancer risk (low-risk control group OR 0.72, 95% CI 0.46-1.15) depending on the control group used, while women with diabetes who did exercise had significantly reduced breast cancer risk (OR 0.41, 95% CI 0.21-0.83) regardless of the control group used (high-risk control group p-value for interaction=0.013, low-risk control group p-value for interaction 0.183).
Should other studies confirm our results, physical activity should be explored as a means of reducing breast cancer risk in diabetic women.
Cancer epidemiology. 10/2010; 34(5):556-61.
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Peggy A Hannon, Maria E Fernandez,
Rebecca S Williams,
Patricia Dolan Mullen,
Cam Escoffery,
Matthew W Kreuter,
Debra Pfeiffer,
Michelle C Kegler,
LeRoy Reese,
Ritesh Mistry,
Deborah J Bowen
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ABSTRACT: The Cancer Prevention and Control Research Network surveyed 282 cancer control planners to inform its efforts to increase the use of evidence-based cancer control programs (EBPs; programs that have been scientifically tested and have successfully changed behavior). Respondents included planners from organizations in state Comprehensive Cancer Control coalitions as well as other governmental and nongovernmental organizations and community-based coalitions. Respondents provided information about personal and organizational characteristics, their cancer control programs, their attitudes toward EBPs, and their awareness and use of Web-based resources for EBPs. Although findings showed strong preferences for cancer control programs that have been shown to work, less than half of respondents (48%) had ever used EBP resources. Regardless of whether they had used EBP resources, almost all respondents (97%) indicated that further training would help them and their organizations adopt and adapt EBPs for use in their communities. The most frequently endorsed training needs were finding and securing additional resources (such as funding and technical assistance), followed by adapting EBPs for cultural appropriateness. The Cancer Prevention and Control Research Network consortium is using these findings to develop a Web-based interactive training and decision support tool that is responsive to the needs identified by the survey respondents.
Journal of public health management and practice: JPHMP 04/2010; 16(3):E1-8. · 0.96 Impact Factor
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ABSTRACT: US Hispanic women have higher cervical cancer incidence rates than non-Hispanic White and African-American women and lower rates of cervical cancer screening. Knowledge, attitudes, and cultural beliefs may play a role in higher rates of infection of human papillomavirus (HPV) and decisions about subsequent diagnosis and treatment of cervical cancer.
To explore the level of HPV knowledge, attitudes, and cultural beliefs among Hispanic men and women on the Texas-Mexico border. METHODOLOGICAL APPROACH: Informed by feminist ethnography, the authors used an interpretive approach to understand local respondents' concerns and interests. Focus group sessions were analyzed using thematic content analysis. RECRUITMENT AND SAMPLE: Promotoras (lay health workers) recruited participants using convenience sampling methods. Group sessions were held in public service centers in Brownsville. Participants' ages ranged from 19 to 76 years. METHODS ANALYSIS: Focus group discussions were audio-recorded and transcribed in Spanish. Researchers read and discussed all the transcripts and generated a coding list. Transcripts were coded using ATLAS.ti 5.0.
Participants had little understanding about HPV and its role in the etiology of cervical cancer. Attitudes and concerns differed by gender. Women interpreted a diagnosis of HPV as a diagnosis of cancer and expressed fatalistic beliefs about its treatment. Men initially interpreted a diagnosis of HPV as an indication of their partners' infidelity, but after reflecting upon the ambiguity of HPV transmission, attributed their initial reaction to cultural ideals of machismo. Men ultimately were interested in helping their partners seek care in the event of a positive diagnosis.
Results suggest that understanding Hispanics' cultural norms and values concerning disease, sexuality, and gender is essential to the design and implementation of interventions to prevent and treat HPV and cervical cancer.
Ethnicity and Health 12/2009; 14(6):607-24. · 1.64 Impact Factor
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ABSTRACT: We investigated whether Latina mothers who were and were not human papillomavirus (HPV) positive differed in their knowledge and acceptance of the HPV vaccine for their children.
We conducted a cross-sectional survey among women aged 18-64 years between April 2007 and April 2008. Data collectors conducted in-person interviews in community clinics with 215 HPV-negative women and 190 HPV-positive women (with respective response rates of 64% and 84%). Most (83%) HPV-positive women were recruited at dysplasia clinics. Although no HPV-negative women were recruited at dysplasia clinics, they were recruited at other low-income public and private clinics.
After adjustment for age, marital status, and health insurance, women who were HPV positive were more likely than HPV-negative women to have heard about the HPV vaccine, to indicate they would have their daughters and sons vaccinated against cervical cancer even if they had to pay themselves, and to be in favor of the proposed Texas law requiring girls to receive the HPV vaccine before entry into sixth grade but less likely to be in favor of girls receiving the vaccine at age > or =13.
Our findings indicate that >90% of Latinas living on the Texas-Mexico border find the HPV vaccine acceptable for their own daughters and sons.
Journal of Women s Health 11/2009; 18(11):1793-9. · 1.57 Impact Factor
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ABSTRACT: This study assessed screening completion rates (SCR) and sociodemographic factors associated with Pap test screening among previously nonadherent, foreign-born Asian Pacific Islander (API) women across four sites participating in a community-based cancer screening program called ENCOREplus. At intake, 926 out of 1,140 women were nonadherent to recommended Pap test screening guidelines. Most participants were age 51 and older, had a high school education or higher, had been in the U.S. less than a decade, had annual household incomes less than $10,000, and were uninsured. Women with limited resources were more likely to get a Pap test after participating in ENCOREplus. Women from the Glendale site were almost 18 times more likely to get a Pap test than API women in other sites. Over half of the women in Glendale reported that help getting low cost Pap tests and having translators available were instrumental in completing screening.
Health Promotion Practice 05/2009; 10(2):210-21.
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ABSTRACT: To address obesity and related morbidities, community-based participatory research (CBPR) strategies were employed to design and evaluate a Spanish-language media campaign promoting physical activity and healthful food choices among Mexican Americans. Process evaluation including content analyses on types and focus of media messages was conducted. Focus groups assessed appeal and trustworthiness of messages. All media campaign products featured role models and experts. Campaign messages primarily (91%) appeared in TV morning show segments. Newsletters presented individual and family role model stories. A majority of newsletters (68%) were distributed through churches and "promotora" outreach efforts. CBPR lends itself to the selection and tailoring of evidence-based media campaigns. Moreover, CBPR guidance resulted in media messages that were credible and appealing to audience. Process evaluation strategies that gather information from the community provide solid evidence for how to modify the campaign to best meet audience expectations.
Health Promotion Practice 02/2009; 11(3):347-57.
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ABSTRACT: Although some "how-to" guides have been written on tailored messaging, we found no reports on lessons learned from the process of developing a tailored intervention. Such lessons may be useful for practitioners and researchers who are new to tailored intervention development. The authors describe lessons gleaned from the process of developing a repeat mammography tailored print intervention. Lessons learned include the following: Selection of determinants appropriate for tailoring should be based on a theoretic framework and refined through assessment of the target population; researchers should anticipate threats to fidelity of intervention delivery because of incomplete or illogical survey data; fingerprinting enables assessment of intervention dose and how it relates to effectiveness of the tailored intervention; and a systematic process for conducting a systems test is needed to check for inconsistencies and errors before final tailored letter production. These lessons are discussed in the context of challenges and possible solutions for tailored health communication.
Health Promotion Practice 08/2008; 9(3):281-8.
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ABSTRACT: Valid and reliable self-report measures of cancer screening behaviors are important for evaluating efforts to improve adherence to guidelines. We evaluated test-retest reliability and validity of self-report of the fecal occult blood test (FOBT), sigmoidoscopy (SIG), colonoscopy (COL), and barium enema (BE) using the National Cancer Institute colorectal cancer screening (CRCS) questionnaire. A secondary objective was to evaluate reliability and validity by mail, telephone, and face-to-face survey administration modes. Consenting men and women, 51 to 74 years old, receiving care at a multispecialty clinic for at least 5 years who had not been diagnosed with colorectal cancer were stratified by prior CRCS status and randomized to survey mode (n = 857). Within survey mode, respondents were randomized to complete a second survey at 2 weeks, 3 months, or 6 months. Comparing self-report with administrative and medical records, concordance estimates were 0.91 for COL, 0.85 for FOBT, 0.85 for SIG, and 0.92 for BE. Overall sensitivity estimates were 0.91 for COL, 0.82 for FOBT, 0.76 for SIG, and 0.56 for BE. Specificity estimates were 0.91 for COL, 0.86 for FOBT, 0.89 for SIG, and 0.97 for BE. Sensitivity and specificity varied little by survey mode for any test. Report-to-records ratio showed overreporting for SIG (1.1), COL (1.15), and FOBT (1.57), and underreporting for BE (0.82). Reliability at all time intervals was highest for COL; there was no consistent pattern according to survey mode. This study provides evidence to support the use of the National Cancer Institute CRCS questionnaire to assess self-report with any of the three survey modes.
Cancer Epidemiology Biomarkers & Prevention 05/2008; 17(4):758-67. · 4.12 Impact Factor
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ABSTRACT: Colorectal cancer (CRC) screening rates are comparatively low for U.S. Hispanics. To learn more about the factors influencing CRC screening among Hispanics living along the U.S.-Mexico border, 12 focus groups were conducted with Hispanic men and women aged 50 years and older in three Texas counties; Cameron County (Brownsville), Webb County (Laredo), and El Paso County, (El Paso). The focus group guide contained questions about health care behavior, knowledge about CRC, experiences with cancer, and factors that influence CRC screening. A total of 92 individuals participated with the majority aged 50-69 (75%). Twenty percent were born in the United States and 51% had lived in the United States for more than 20 years. Participants had low levels of education, income, and insurance coverage. The analysis revealed several overarching and contextual themes relating to knowledge, attitudes, beliefs, and emotions about cancer and CRC screening. A prevalent theme that emerged from all groups was frustration and a lack of confidence in the U.S. healthcare system. Few participants had been advised by their providers to obtain CRC screening. Lack of patient knowledge about colorectal cancer and screening appeared to be a critical factor influencing screening. Themes about death and pain due to cancer were prevalent as were cultural factors such as machismo and embarrassment. System level barriers such as cost, medical insurance and transportation also impacted screening. These findings suggest that strategies are needed to educate Hispanic residents of border communities about CRC and to motivate them to undergo CRC screening.
Cancer Causes and Control 04/2008; 19(2):195-206. · 2.88 Impact Factor
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Sally W Vernon,
Deborah J del Junco,
Jasmin A Tiro,
Sharon P Coan,
Catherine A Perz,
Lori A Bastian,
William Rakowski,
Wen Chan,
David R Lairson,
Amy McQueen, Maria E Fernandez,
Cynthia Warrick,
Arada Halder,
Carlo DiClemente
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ABSTRACT: Few health promotion trials have evaluated strategies to increase regular mammography screening. We conducted a randomized controlled trial of two theory-based interventions in a population-based, nationally representative sample of women veterans.
Study candidates 52 years and older were randomly sampled from the National Registry of Women Veterans and randomly assigned to three groups. Groups 1 and 2 received interventions that varied in the extent of personalization (tailored and targeted vs targeted-only, respectively); group 3 was a survey-only control group. Postintervention follow-up surveys were mailed to all women after 1 and 2 years. Outcome measures were self-reported mammography coverage (completion of one postintervention mammogram) and compliance (completion of two postintervention mammograms). In decreasingly conservative analyses (intention-to-treat [ITT], modified intention-to-treat [MITT], and per-protocol [PP]), we examined crude coverage and compliance estimates and adjusted for covariates and variable follow-up time across study groups using Cox proportional hazards regression. For the PP analyses, we also used logistic regression.
None of the among-group differences in the crude incidence estimates for mammography coverage was statistically significant in ITT, MITT, or PP analyses. Crude estimates of compliance differed at statistically significant levels in the PP analyses and at levels approaching statistical significance in the ITT and MITT analyses. Absolute differences favoring the intervention over the control groups were 1%-3% for ITT analysis, 1%-5% for MITT analysis, and 2%-6% for the PP analysis. Results from Cox modeling showed no statistically significant effect of the interventions on coverage or compliance in the ITT, MITT, or PP analyses, although hazard rate ratios (HRRs) for coverage were consistently slightly higher in the intervention groups than the control group (range for HRRs = 1.05-1.09). A PP analysis using logistic regression produced odds ratios (ORs) that were consistently higher than the corresponding hazard rate ratios for both coverage and compliance (range for ORs = 1.15-1.29).
In none of our primary analyses did the tailored and targeted intervention result in higher mammography rates than the targeted-only intervention, and there was limited support for either intervention being more effective than the baseline survey alone. We found that adjustment for variable follow-up time produced more conservative (less favorable) intervention effect estimates.
CancerSpectrum Knowledge Environment 04/2008; 100(5):347-58. · 14.07 Impact Factor
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ABSTRACT: Interventions to promote informed decision making (IDM) for cancer screening are increasingly common. The resulting body of literature provides an opportunity for a systematic review of measures in use. We searched standard databases for intervention trials and other studies of screening decisions and decision aids, finding 2,110 unique citations (most with abstracts) that we reduced to 104 full-text articles; 36 studies met inclusion criteria (prostate = 20, colorectal = 9, breast = 6, cervical = 1). Two independent coders abstracted data on study characteristics, constructs, and measures. Our findings revealed that most studies measured screening (or intention) and knowledge; fewer measured recommended IDM-related constructs and none measured all outcomes proposed for evaluating IDM interventions. Validity and reliability of measures received inadequate attention in study reports, and conceptual overlap exists among measures. Few IDM measures have been developed/carefully adapted from treatment measures and tested for cancer screening or in diverse populations. We recommend that new and in-progress studies emphasize outcomes beyond knowledge-participation in decision making according to personal preference, satisfaction with the process, and consistency between decisions and values. Also needed is better use of theory to guide conceptualization and operationalization of measures, greater attention to reliability and validity (particularly in diverse populations), more thorough reporting of sources and operating characteristics of measures, and increased emphasis and resources focused on these issues by funders, researchers, and journal editors.
Annals of Behavioral Medicine 01/2007; 32(3):188-201. · 4.20 Impact Factor
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Steven S Coughlin,
Mary E Costanza, Maria E Fernandez,
Karen Glanz,
Judith W Lee,
Selina A Smith,
Leonardo Stroud,
Irene Tessaro,
John M Westfall,
Joel L Weissfeld,
Daniel S Blumenthal
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ABSTRACT: Although strong scientific evidence has shown that screening for colorectal cancer saves lives, most U.S. adults who are at the recommended age are not being screened. Prior studies suggest that barriers to routine screening vary by race, ethnicity, socioeconomic status, urban/rural residence, health insurance status, and factors related to health care providers and the health care environment. Relatively few studies, however, have identified and tested intervention approaches to promote routine colorectal cancer screening among diverse populations.
The Division of Cancer Prevention and Control at CDC has funded ongoing projects to develop and test interventions to promote routine colorectal cancer screening among medically underserved populations in Appalachia, the Lower Rio Grande Valley in Texas, the High Plains region of Colorado, and other U.S. communities.
This article provides an overview of colorectal cancer screening intervention studies currently funded by CDC that focus on a wide range of populations, including medically underserved persons who live in predominately rural areas, Hispanic and non-Hispanic persons, urban African Americans, persons with low health literacy, and persons enrolled in managed care organizations.
These CDC-funded intervention research projects are likely to contribute importantly to evidence about what works to promote colorectal cancer screening in diverse U.S. communities. .
Cancer 10/2006; 107(5 Suppl):1196-204. · 4.77 Impact Factor
