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Participation in clinical trials high among gay, lesbian and bisexual cancer survivors

SAN DIEGO Cancer survivors who self-identified as being lesbian, gay or bisexual were more than twice as likely as heterosexual cancer survivors to have participated in cancer clinical trials, according to data from a small study presented at the Fifth AACR Conference on The Science of Cancer Health Disparities, held here Oct. 27-30, 2012.

"The data from which our findings were derived were incredibly limited. We have to interpret these data cautiously," said Jennifer M. Jabson, M.P.H., Ph.D., a postdoctoral research fellow in the department of community health sciences at Boston University School of Public Health.

In 2011, the Institute of Medicine (IOM) issued a report titled "The Health of Lesbian, Gay, Bisexual and Transgender People: Building a Foundation for Better Understanding," in which it identified this community as medically underserved. Jabson and colleagues studied the representation of the lesbian, gay and bisexual community in cancer clinical trials to add to existing knowledge about their experience with cancer and their participation in the clinical trial system.

The researchers used data from the Behavioral Risk Factor Surveillance System and an optional module that assesses cancer survivor participation in cancer clinical trials. They collected data from five states Massachusetts, New Mexico, Wisconsin, Alaska and California that used this module and an item asking self-identified lesbian, gay and bisexual status. The total population was 4,339 people.

"We thought there would be an under-representation of lesbian, gay and bisexual individuals in the data," Jabson said. "We only found one prior paper that had been published in the last 10 years on the topic, and it found that individuals in this community were more often excluded in all clinical trials, not just those specific to cancer."

However, the results of this study indicated that 12.5 percent of the cancer survivor population that self-identified as being lesbian, gay and bisexual participated in clinical trials compared with 6 percent of the heterosexual cancer survivor population. When adjusting the data to account for participants' age, sex, education, race/ethnicity and survey location, cancer survivors from the lesbian, gay and bisexual community were more than twice as likely to report participation in a clinical trial.

Jabson said it is difficult to infer an explanation for these findings.

"We need to replicate our findings in a larger and more comprehensive sample to explore some of the causal or explanatory variables and to make sure that the result was not an artifact of the sample," she said. "In addition, we agree with the IOM report that sexual orientation should be collected as a demographic variable in population-based health surveillance systems and cancer registries."

Additional studies are warranted to explain the greater representation of individuals who self-identify as lesbian, gay and bisexual in cancer survivor clinical trials and potentially to identify ways to prevent and treat cancer in this community, according to Jabson.

Contact: Jeremy Moore
American Association for Cancer Research

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