Jl. Richardson et al., ADHERENCE TO SCREENING EXAMINATIONS FOR COLORECTAL-CANCER AFTER DIAGNOSIS IN A 1ST-DEGREE RELATIVE, Preventive medicine, 24(2), 1995, pp. 166-170
Citations number
15
Categorie Soggetti
Public, Environmental & Occupation Heath","Medicine, General & Internal
Reports of colorectal cancer screening behavior were collected from 83
twin sisters of colorectal cancer cases and compared to the patterns
found by national surveys. Prior to the diagnosis of colorectal cancer
in a twin, the unaffected cotwins were being screened at rates close
to those of the general population. In the years after diagnosis the a
nnual frequency of each exam increased by approximately 15 to 20 perce
ntage points. By the time of response nearly 89% of these cotwins had
at least one fecal occult blood test, 90% had at least one digital rec
tal exam, and 69% had a sigmoidoscopy in comparison to 44, 63, and 27%
of the general population, respectively. However, despite the evident
familial risk, within the year prior to the report, 42.3% of colorect
al cancer twins had had a fecal occult blood test, 44.3% had had a dig
ital rectal exam, and 16% had had a sigmoidoscopy exam (the comparable
figures from the general population sample are 14.5, 19.3, and 4%, re
spectively). The colorectal cotwins have a higher rate of sigmoidoscop
y screening than either the National Health Interview Survey or the br
east cotwins. Both colorectal and breast cancer cotwins have a higher
rate of fecal occult blood test and digital rectal exam than the NHIS
sample. This suggests that those at increased risk of cancer in genera
l, are more likely to obtain routine screening including fecal occult
blood test and digital rectal exam as part of the physical exam; howev
er, the specialized sigmoidoscopy screening is more likely to be provi
ded to those at most risk. (C) 1995 Academic Press, Inc.