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Comparing substance use outcomes by sexual identity among women: Differences using propensity score methods
Katherine J Karriker-Jaffe1, Laurie A Drabble2, Libo Li3
1Research Triangle Institute, 2150 Shattuck Ave, Suite 800, Berkeley, USA.
Drug and Alcohol Dependence
|July 28, 2022
Summary
Sexual minority women (SMW) show higher odds of drug use compared to heterosexual women, irrespective of sampling methods. This highlights persistent disparities in substance use among SMW.
Area of Science:
- Public Health
- Sociology
- Psychology
Background:
- Substance use disparities between sexual minority women (SMW) and heterosexual women vary by sampling methods.
- Propensity score (PS) weighting was employed to address methodological questions regarding these disparities.
Purpose of the Study:
- To determine if disparities in alcohol, tobacco, and other drug (ATOD) use between SMW and heterosexual women persist after accounting for risk and protective factors.
- To assess the impact of SMW-specific resiliency factors on ATOD use differences in non-probability samples.
Main Methods:
- Utilized four samples: SMW from a longitudinal nonprobability study, a national general population panel, a national LGBTQ-specific panel, and a national probability sample of heterosexual women.
- Employed double-robust propensity score (PS) weighted models to estimate ATOD use differences under conditions of similar risk and protective factors.
Main Results:
- PS weighting reduced but did not eliminate confounder imbalance between SMW and heterosexual samples.
- SMW consistently exhibited significantly greater odds of drug use (frequent marijuana and other drug use) compared to heterosexual women.
- Few differences in ATOD outcomes remained between different SMW samples after PS weighting.
Conclusions:
- Disparities in marijuana and other drug use among SMW compared to heterosexual women are evident across all sampling strategies.
- Findings offer reassurance regarding the validity of nonprobability samples for research with SMW.
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