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BMI and Cancer Screening - Biostatistics Reading

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by

Ali Sierocki

on 26 February 2013

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Transcript of BMI and Cancer Screening - Biostatistics Reading

By: Lindsey Phelps and Allison Sierocki What was the purpose of conducting this study? Method Results *Being older aged, married, a non smoker, and having health insurance, made them more likely to receive both the FOBT and PSA.

*Men living in rural communities are less likely to be tested for PSA.

*They also found that BMI was not associated with either test. Body Mass Index and Cancer Screening in Older American Indian and Alaska Native American Men No study has examined the relationship between being overweight/obese and cancer screening among American Indian and Alaska Natives. What type of study was conducted? pg. 104 A national cross-sectional survey was administered to American Indian and Alaska Native men. pg. 104 * The study utilized data from the National Resource Center on Native American Aging.

*They used the data on 2,447 Native American and Alaska Native men who were at least 55 years of age.

*FOBT and PSA tests were both self reported regarding most recent testing. What statistical test did they use? pg. 105 They used two logistic regression models. One was FOBT vs. BMI. The second was PSA vs. BMI. What was the researchers objective? * To describe the prevalence of fecal occult blood testing (FOBT) and prostate-specific antigen (PSA) testing among AI/AN men within the past year by age and rurality, and determine if body mass index (BMI) is associated with screening. pg. 104 or 105 Variables and Measurements Testing: Determined using responses to questions regarding most recent FOBT and PSA tests
Age: self-reported
Rurality: Determined to be rural or urban based on area code
BMI: Calculated using respondents' self-reported height and weight What were the covariates they derived from the literature as potential confounders? Included age, marital status, education, limitations in activities of daily living, smoking status, health insurance coverage, and rurality of residence assessed by rural-urban commuting area codes. pg. 105 These results seem low for these populations, but it is also important to note that they are lower than similarly aged men in other populations. Results 23% of the elderly AI/AN men had received a FOBT test within the past year. 40% of all the AI/AN men had received a PSA test in the past year. What were some of the limitations of the study? Limitations * Sample not randomly selected

* All of the calculations were based on self reported answers Conclusion Our findings are cause for concern given that the prognosis of prostate and colorectal cancer is greatly improved when these malignancies are detected early. The findings indicated problem areas among older AI/AN men with obesity and low cancer testing rates, but the 2 were unrelated in this sample. Future studies are needed to assess barriers to receiving timely prostate and colorectal cancer screenings.
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