The Impact of Test Outcome Certainty on Interest in Genetic Testing Among College Women

Predictors of genetic testing decisions: a systematic review and critique of the literature

Genetic testing is increasingly available in medical settings and direct-to-consumer. However, the large and growing literature on genetic testing decisions is rife with conflicting findings, inconsistent methodology, and uneven attention across test types and across predictors of genetic testing decisions. Existing reviews of the literature draw broad conclusions but sacrifice nuanced analysis that with a closer look reveals far more inconsistency than homogeny across studies. The goals of this paper are to provide a systematic review of the empirical work on predictors of genetic testing decisions, highlight areas of consistency and inconsistency, and suggest productive directions for future research. We included all studies that provided quantitative analysis of subjective (e.g., perceived risk, perceived benefits of testing) and/or objective (e.g., family history, sociodemographic variables) predictors of genetic testing interest, intentions, or uptake, which produced a sample of 115 studies. From this review, we conclude that self-reported and test-related (as opposed to disorder-related or objective) predictors are relatively consistent across studies but that theoretically-driven efforts to examine testing interest across test types are sorely needed.

Are adolescents with ADHD interested in genetic testing for nicotine addiction susceptibility?

It has been well-established that some adolescents diagnosed with attention-deficit/hyperactivity disorder (ADHD) are at increased risk for cigarette smoking. Current research on the genetic basis of this association could ultimately translate into genetic tests capable of identifying smoking-prone adolescents with ADHD. In this study we examined 81 ADHD affected adolescents’ (age 13–21) interest in genetic testing for nicotine addiction susceptibility. Fifty-seven percent of adolescents indicated a fair amount of interest or more in testing. Most adolescents indicated that the personal information revealed from testing would be either useful (29%) or interesting (37%). Implications for genetically-informed smoking prevention and cessation interventions in high risk adolescents with ADHD are discussed.

Genetic Testing for Late-Onset Diseases: Effect of Disease Controllability, Test Predictivity, and Gender on the Decision to Take the Test

This study was designed to investigate the influence of the predictive power of the genetic test, the disease's controllability, and gender on the intention to take a predictive genetic test. Another aim was to examine the certainty of the intention to take the test. Nine scenarios were presented to a convenience sample of 121 men and women. Each scenario described a hypothetical and devastating late-onset disease and manipulated the level of disease controllability and test predictive value. The more predictivity the test offered and the more controllable the disease, the more the subjects were interested in being tested and the more certain their decision to take the test. Men's decisions were more positive than women's. There were also interactions between disease controllability and gender and between disease controllability and test predictivity. It seems that the factor that most influences the decision not to take the test is low disease controllability. This effect is more pronounced in women. Gender differences in decision making and information processing may be pertinent. The data show a marked gap between the decision itself and the certainty of that decision. The strength of the decision may be a better predictor of actual test uptake than the direction of the decision.