Bias From Potentially Mischievous Responders on Large-Scale Estimates of Lesbian, Gay, Bisexual, or Questioning (LGBQ)–Heterosexual Youth Health Disparities

Abstract

OBJECTIVES: To determine how sensitive estimates of lesbian, gay, bisexual, or questioning (LGBQ)-heterosexual youth health disparities are to the presence of potentially mischievous responders. METHODS: We used US data from the 2015 Youth Risk Behavior Survey, pooled across jurisdictions that included a question about sexual identity for a total sample of 148 960 students. We used boosted regressions (a machine-learning technique) to identify unusual patterns of responses to 7 screener items presumably unrelated to LGBQ identification, which generated an index of suspected mischievousness. We estimated LGBQ-heterosexual youth disparities on 20 health outcomes; then we removed 1% of suspected mischievous responders at a time and re-estimated disparities to assess the robustness of original estimates. RESULTS: Accounting for suspected mischievousness reduced estimates of the average LGBQ-heterosexual youth health disparity by up to 46% for boys and 23% for girls; however, screening did not affect all outcomes equally. Drug- and alcohol-related disparities were most affected, particularly among boys, but bullying and suicidal ideation were unaffected. CONCLUSIONS: Including screener items in public health data sets and performing rigorous sensitivity analyses can support the validity of youth health estimates.

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