Importance
Germline variants in the MC1R gene are common and confer moderate melanoma risk in those with varied skin types. Approaches to precision skin cancer prevention that include genetic information may promote risk awareness and risk reduction in the general population, including Hispanics.
Objective
To examine prevalence of interest in and uptake of MC1R testing in the general population and examine patterns across demographic and skin cancer risk factors.
Design
A randomized controlled trial examined interest in and uptake of MC1R testing. Study participants were randomized to either a usual care condition (NCI skin cancer pamphlet for diverse skin types) or an MC1R test offer.
Setting
University of New Mexico General Internal Medicine clinics.
Participants
Participants were registered clinic patients (≥ 6 months) and English or Spanish fluent. Of the N=600 recruited to the overall trial, the current study included those 499 participants randomized to the MC1R test offer (44% non-Hispanic white, 49% Hispanic, 79% female; mean age=54).
Intervention
Participants were presented with the option to log onto the study website to read three educational modules presenting the rationale, benefits and drawbacks of MC1R testing.
Main Outcomes and Measures
Main outcomes include website logon (yes vs. no), saliva test kit request (yes vs. no), and saliva test kit return for MC1R testing (yes vs. no). Demographic and skin cancer risk factors were examined as potential predictors of test interest and uptake.
Results
About half of participants (46%, n=232) elected to learn about MC1R testing by logging onto the website; most that logged on decided to request testing (88%, n=204); and most who requested testing returned the kit (82%, n=167). The strongest predictors of website logon were race/ethnicity and education (non-Hispanic whites and more highly educated were more likely to log on); the strongest predictor of ordering the test was sunburn history.
Conclusion and Relevance
There were moderately high levels of MC1R test interest and uptake in this diverse sample. Addressing potential barriers to testing may be warranted as genomic information becomes integrated into general population approaches to the precision prevention of skin cancer.