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Obese Women Less Likely to Complete Mammograms and More Likely to Report Pain with the Procedure


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Study finds that barriers to breast cancer screening remain even among insured women

PORTLAND, Ore. — Obese women may avoid mammograms because of pain and women under 60 may avoid the test because they are too busy, according to a study by Kaiser Permanente Center for Health Research published online in the Journal of Women’s Health. Funded by the National Cancer Institute, the study was one of the largest to examine why insured women fail to complete mammograms.

Breast cancer is the most common cancer among women in the United States, with one in eight developing breast cancer during their lifetimes, and 46,000 dying from it annually. Although regular mammograms can reduce breast cancer deaths by more than 30 percent, and the US Preventive Services Task Force recommends screenings every 1-2 years beginning at age 50, nearly one-third of eligible women do not get regular screenings.

“These are important findings because, even though we know that mammograms can save lives, many women put them off,” said study lead author and physician Adrianne Feldstein, MD, a senior investigator with the Kaiser Permanente Center for Health Research. “Our study found that, even when women have access to health care, there are still barriers to getting this important screening test. We need to do more to understand these barriers and help women overcome them.”

The study looked at 4,708 women aged 50-69 at Kaiser Permanente in Oregon and Washington who had gone longer than 20 months since their last mammogram, and were reminded through postcards and phone calls that they would soon be due for the test. Researchers identified these women by looking at their medical records, which contained the date of their last mammogram. Researchers also examined physical and demographic information — including height and weight, age, race, length of time on the health plan and family income — to find out how these factors affected mammogram completion rates.

Characteristics associated with lower mammogram completion rates included being younger than 60, having a household income of less than $40,000, being obese, and having had health insurance coverage for fewer than five years.

A subset of 677 women were mailed a survey asking why they hadn’t completed their mammograms. About half (340) of these women completed the survey. The reasons they cited most often for not completing a mammogram included the test causing too much pain, being too busy, and feeling embarrassed to have the test.

Nearly one-quarter of the women surveyed (24.7 percent) reported too much pain as a reason why they had not completed a mammogram. Obese women were nearly twice as likely as non-obese women to report pain as a deterrent (31 percent vs. 19 percent).

“We don’t know why obese women report more pain with mammograms,” said Dr. Feldstein. “One previous study suggests that obesity might be associated with a lower pain threshold. Nearly half of the women in our study were obese and obese women are more likely to get breast cancer, so we need to find better ways to ensure that these women are screened.”

Kaiser Permanente is one of the best in the nation in mammography screenings, based on information from the National Committee on Quality Assurance’s Quality Compass® report for 2010.*

The authors point out that their study has implications for helping health care systems reduce barriers to mammogram completion. Since obese women reported receiving the same amount of advice to get screened as non-obese women, and did not report feeling more embarrassed to get mammograms, it’s unlikely that they would respond to more clinician-oriented interventions. The authors suggest that patient-controlled compression or the use of alternate screening technologies could be especially helpful to obese women.

Women under 60 were more likely than those 60 and over to report being too busy to get a mammogram (19 percent of younger women said they were too busy, vs. only 6 percent of older women). The authors say that younger women might be more likely to complete mammograms if health care systems provided more opportunities for worksite screening and after-hours mammography appointments.

The study is part of Kaiser Permanente’s ongoing effort to encourage preventive health through raising cancer screening rates. Nationwide, Kaiser Permanente has an array of services designed to ensure screening for breast cancer, ranging from mobile screening vans and breast-health fairs, to built-in prompts in its electronic health records system, Kaiser Permanente HealthConnect® — the world’s largest civilian electronic health record.

Study authors include: Adrianne Feldstein, MD, MS, Nancy Perrin, PhD, A. Gabriela Rosales, MS, Jennifer Schneider, MPH, and Mary M. Rix, RN, all with the Kaiser Permanente Center for Health Research in Portland, Ore.; and Russell E. Glasgow, PhD, of the Institute for Health Research, Kaiser Permanente, Penrose, Colo.


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*The source for data contained in this publication is Quality Compass® 2010 and is used with the permission of the National Committee for Quality Assurance (NCQA). Quality Compass 2010 includes certain CAHPS data. Any data display, analysis, interpretation, or conclusion based on these data is solely that of the authors, and NCQA specifically disclaims responsibility for any such display, analysis, interpretation, or conclusion. Quality Compass is a registered trademark of NCQA. CAHPS® is a registered trademark of the Agency for Healthcare Research and Quality (AHRQ).

HEDIS is a registered trademark of NCQA.


About the Kaiser Permanente Center for Health Research
Kaiser Permanente’s Center for Health Research, founded in 1964, is a nonprofit research institution dedicated to advancing knowledge to improve health. It has research sites in Portland, Ore., Honolulu and Atlanta.


About Kaiser Permanente
Kaiser Permanente is committed to helping shape the future of health care. We are recognized as one of America’s leading health care providers and not-for-profit health plans. Founded in 1945, our mission is to provide high-quality, affordable health care services and to improve the health of our members and the communities we serve. We currently serve 8.6 million members in nine states and the District of Columbia. Care for members and patients is focused on their total health and guided by their personal physicians, specialists and team of caregivers. Our expert and caring medical teams are empowered and supported by industry-leading technology advances and tools for health promotion, disease prevention, state-of-the art care delivery and world-class chronic disease management. Kaiser Permanente is dedicated to care innovations, clinical research, health education and the support of community health.



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