Journal
PUBLIC HEALTH GENOMICS
Volume 18, Issue 4, Pages 216-224Publisher
KARGER
DOI: 10.1159/000431250
Keywords
Commercial genetics; Direct-to-consumer genetic testing; Personal genomic testing; Public health policy; Risk comprehension
Funding
- National Institutes of Health (NIH) National Human Genome Research Institute [R01-HG005092]
- Canadian Institutes of Health Research (Doctoral Foreign Study Award)
- NIH [U01-HG006500, U19-HD077671, R01-HG002213]
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Aim: To assess customer comprehension of health-related personal genomic testing (PGT) results. Methods: We presented sample reports of genetic results and examined responses to comprehension questions in 1,030 PGT customers (mean age: 46.7 years; 59.9% female; 79.0% college graduates; 14.9% non-White; 4.7% of Hispanic/Latino ethnicity). Sample reports presented a genetic risk for Alzheimer's disease and type 2 diabetes, carrier screening summary results for >30 conditions, results for phenylketonuria and cystic fibrosis, and drug response results for a statin drug. Logistic regression was used to identify correlates of participant comprehension. Results: Participants exhibited high overall comprehension (mean score: 79.1% correct). The highest comprehension (range: 81.1-97.4% correct) was observed in the statin drug response and carrier screening summary results, and lower comprehension (range: 63.6-74.8% correct) on specific carrier screening results. Higher levels of numeracy, genetic knowledge, and education were significantly associated with greater comprehension. Older age (>= 60 years) was associated with lower comprehension scores. Conclusions: Most customers accurately interpreted the health implications of PGT results; however, comprehension varied by demographic characteristics, numeracy and genetic knowledge, and types and format of the genetic information presented. Results suggest a need to tailor the presentation of PGT results by test type and customer characteristics. (C) 2015 S. Karger AG, Basel
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