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Annual Meeting Proceedings Part 1 - American Society of Clinical ...

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1563 General Poster Session (Board #4E), Sat, 1:15 PM-5:15 PM<br />

Risk perception and knowledge <strong>of</strong> breast and colon cancers in a diverse<br />

population. Presenting Author: Katherine Lang, Virginia Commonwealth<br />

University, Richmond, VA<br />

Background: The accuracy <strong>of</strong> cancer risk perception has implications for<br />

preventive behaviors. Studies show that despite receiving personalized<br />

breast and colon cancer risk information, people continue to overestimate<br />

their numeric risks. It is still not fully understood why this occurs. Breast<br />

cancer, especially, is highly visible in the media so an individual may hear<br />

more about breast cancer, increasing general knowledge but potentially<br />

inflating risk perceptions. This study explores relationships between<br />

general knowledge and numeric risk perceptions for breast cancer (BC) and<br />

colon cancer (CC) among women. We hypothesize that general knowledge<br />

<strong>of</strong> BC will be high relative to CC, but risk perception for BC will be less<br />

accurate. Methods: Data was obtained from the first 369 (final N�490)<br />

patients recruited for the Kin Fact study from a Women’s Health Clinic. Kin<br />

Fact is a randomized controlled trial examining effects <strong>of</strong> an intervention to<br />

increase cancer risk communication in families. Women complete baseline<br />

surveys including knowledge and numeric risk perception measures for BC<br />

and CC. We use CA Gene s<strong>of</strong>tware to calculate actual lifetime risk for BC<br />

and CC. Correlations, t-tests and linear regressions were used for the<br />

analysis. Results: Women averaged 33 years old, and 58% were African<br />

<strong>American</strong>. Average lifetime risk was 3% for CC and 11% for BC. Women<br />

overestimated their numeric risk for both BC and CC, but the mean<br />

overestimation for BC (24%) was significantly larger than for CC (19%)<br />

(p�0.001). Average scores for BC knowledge were also significantly higher<br />

than for CC (p�0.001). Compared to knowledge about CC, women who had<br />

greater knowledge <strong>of</strong> BC also were more inaccurate in terms <strong>of</strong> their<br />

perceived numeric risk (r� -0.131, p�0.016). This finding remained<br />

significant controlling for age, race and genetic literacy. Conclusions:<br />

Results endorse an apparently paradoxical effect that compared with CC,<br />

women with increased knowledge <strong>of</strong> BC have less accurate risk perception<br />

for BC. Inaccuracies in perceived risk can affect psychosocial well-being<br />

and adherence to screening and prevention recommendations. Findings<br />

reveal a need for increasing knowledge about cancer without adversely<br />

impacting the accuracy <strong>of</strong> risk perceptions.<br />

1565 General Poster Session (Board #4G), Sat, 1:15 PM-5:15 PM<br />

Factors and trends in cancer screening in the United States from 2004 to<br />

2010. Presenting Author: Thanyanan Reungwetwattana, Mayo Clinic,<br />

Rochester, MN<br />

Background: Understanding the prevalence <strong>of</strong> cancer screening in the US<br />

and the factors associated with its accessibility is important for public<br />

health promotion. Methods: The 2004 and 2010 Behavioral Risk Factor<br />

Surveillance Systems were used to ascertain cancer screening rates among<br />

populations indicated for each test by age, gender, and the <strong>American</strong><br />

Cancer <strong>Society</strong> recommendation for cancer screenings [fecal occult blood<br />

test (FOBT) or endoscopy for colorectal cancer (CRC) screening, digital<br />

rectal examination (DRE) or prostate specific antigen (PSA) for prostate<br />

cancer screening, clinical breast examination (CBE) or mammogram for<br />

breast cancer screening, and Papanicolaou (Pap) test for cervical cancer<br />

screening]. Results: Over this period, CRC and breast cancer screening rates<br />

significantly increased (15.9%, 13.9%) while prostate and cervical cancer<br />

screening rates significantly decreased (1.2%, 5.2%). Race/ethnicity<br />

might be an influence in CRC and cervical cancer screening accessibility.<br />

Prostate cancer screening accessibility might be influenced by education<br />

and income. The older-aged populations (70-79, �79) had high prevalence<br />

<strong>of</strong> CRC, prostate and breast cancer screenings even though there is<br />

insufficient evidence for the benefits and harms <strong>of</strong> screenings in the<br />

older-aged group. Conclusions: The disparities in age, race/ethnicity, health<br />

insurance, education, employment, and income for the accession to cancer<br />

screening <strong>of</strong> the US population have decreased since 2004. The trajectory<br />

<strong>of</strong> increasing rates <strong>of</strong> CRC and breast cancer screenings should be<br />

maintained. To reverse the trend, the causes <strong>of</strong> the decreased rate <strong>of</strong><br />

cervical cancer screening and the high rates <strong>of</strong> screenings in older-aged<br />

populations should, however, be further explored.<br />

Proportion <strong>of</strong> cancer screenings in year 2004 and 2010 (weighted %).<br />

Screenings 2004 2010 Absolute difference P value<br />

CRC<br />

FOBT<br />

17.52 18.25<br />

�0.73 0.001<br />

Sigmoidoscope/colonoscope 49.66 59.90 �10.24 0.000<br />

Total<br />

49.74 65.62 �15.88 0.000<br />

Prostate cancer<br />

DRE<br />

64.35 59.89<br />

-4.46 0.000<br />

PSA<br />

65.87 66.71<br />

�0.84 0.080<br />

Total<br />

77.40 76.24<br />

-1.16 0.008<br />

Breast cancer<br />

CBE<br />

63.26 82.99 �19.73 0.000<br />

Mammogram<br />

74.06 74.88<br />

�0.82 0.004<br />

Total<br />

74.06 87.94 �13.88 0.000<br />

Cervical cancer<br />

Pap 76.06 70.83 -5.23 0.000<br />

Cancer Prevention/Epidemiology<br />

101s<br />

1564 General Poster Session (Board #4F), Sat, 1:15 PM-5:15 PM<br />

First report on screening an asymptomatic population for cancer: The yield<br />

<strong>of</strong> an integrated cancer prevention center. Presenting Author: Tal Sella,<br />

Sheba Medical Center, Ramat Gan, Israel<br />

Background: Cancer is a leading cause <strong>of</strong> mortality worldwide. Screening is<br />

a key strategy for reducing cancer morbidity and mortality. We aimed to<br />

evaluate the utility <strong>of</strong> cancer screening in an asymptomatic population at<br />

an integrated cancer prevention center. Methods: One-thousand consecutive<br />

asymptomatic, apparently healthy adults, aged 20-80 years, were<br />

screened for early detection <strong>of</strong> 11 common cancers by routine screening<br />

tests. Results: Malignant and benign lesions were found in 2.4% and 7.1%<br />

<strong>of</strong> the screenees, respectively. The most common malignant lesions were in<br />

the gastrointestinal tract and breast followed by gynecological and skin.<br />

The compliance rate for the different screening procedures was considerably<br />

higher than the general Israeli population – 78% compared to 60% for<br />

mammography (p�0.001) and 39% compared to 16% for colonoscopy<br />

(p�0.001). Advanced age, family history and certain lifestyle parameters<br />

were associated with increased risk for cancer. Moreover, polymorphisms in<br />

the APC and CD24 genes indicated high cancer risk. When two <strong>of</strong> the<br />

polymorphisms existed in an individual, the risk for a neoplastic lesion was<br />

extremely high (OR 2.3 [95% CI 0.94-5.9]). Conclusions: A significant<br />

number <strong>of</strong> neoplastic lesions were diagnosed at an early stage. Polymorphisms<br />

in the APC and CD24 genes may identify individuals at an<br />

increased risk for cancer. Cancer may be diagnosed at an early stage using<br />

the screening facilities <strong>of</strong> a multidisciplinary outpatient clinic.<br />

1566 General Poster Session (Board #4H), Sat, 1:15 PM-5:15 PM<br />

Sun exposure pr<strong>of</strong>ile in the French population: Results <strong>of</strong> the EDIFICE<br />

melanoma survey. Presenting Author: Bruno Sassolas, CHRU Brest, Brest,<br />

France<br />

Background: The main environmental risk factor for melanoma is related to<br />

UV-exposure. Our objective was to evaluate in a survey the pr<strong>of</strong>ile <strong>of</strong> sun<br />

exposition in the French population as well as the level <strong>of</strong> knowledge about<br />

UV risk and UV protection. Methods: “Edifice Melanoma” a nationwide<br />

observational survey was conducted in France via phone interviews among a<br />

representative sample <strong>of</strong> 1502 subjects aged � 18, using the quota<br />

method. The survey took place shortly after the summer (September 28th to<br />

October 20th , 2011). Results: From the total population <strong>of</strong> 1502 subjects,<br />

330 (22%) denied any sun exposition. Among those declaring being<br />

exposed to the sun (1172), 62% affirmed using a photoprotection method<br />

(clothes, sun protective cream). The opportunities for sun exposure arose<br />

during holidays (85%), sport (79%) or pr<strong>of</strong>essional activities (23%), with<br />

an annual average exposure <strong>of</strong> 113 days. 902 subjects (77%) declared<br />

avoiding sun exposure between 12 and 4 PM. The main sociodemographic<br />

characteristics <strong>of</strong> subjects exposed to the sun, compared to non-exposed<br />

ones are as followed (p�0,05): men, aged �40, with no children or with<br />

children aged �15, from high social and occupational group, with at least a<br />

2-years university degree. The analysis <strong>of</strong> sociodemographic characteristics<br />

<strong>of</strong> subjects declaring to use sun protective measures are (p�0,05): women<br />

from high social and occupational group, with at least a 2-years university<br />

degree, with high income levels. We explored additional risk behavior in the<br />

population studied. Subjects who declared having sun exposure were more<br />

likely (p�0,05) to be : smokers, alcohol users and/or alcoholic, tanning bed<br />

users before the age <strong>of</strong> 30, and have a high number <strong>of</strong> nevi (�50). On the<br />

other hand, prior history <strong>of</strong> cancer was associated with a non-exposure<br />

behavior. Conclusions: These data provide important new information about<br />

sun behavior in the French population and might give important clues in<br />

the field <strong>of</strong> public health and education to increase the effectiveness <strong>of</strong><br />

melanoma primary prevention campaigns. A better knowledge <strong>of</strong> the target<br />

to improve would provide better results for public health benefit.<br />

Visit abstract.asco.org and search by abstract for the full list <strong>of</strong> abstract authors and their disclosure information.

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