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Contraceptive adherence among women Veterans with mental illness and substance use disorder.

Callegari LS, Zhao X, Nelson KM, Borrero S. Contraceptive adherence among women Veterans with mental illness and substance use disorder. Contraception. 2015 May 1; 91(5):386-92.

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Abstract:

OBJECTIVE: Emerging data suggest that mental illness and substance use disorder (SUD) are important risk factors for inconsistent contraceptive use. We investigated whether mental illness without or with SUD is associated with contraceptive adherence and continuation of hormonal methods among women Veterans. STUDY DESIGN: We conducted a retrospective analysis of national Veteran''s Administration data among women aged 18-45 with a hormonal contraceptive prescription (pill/patch/ring/injectable) during the first week of fiscal year 2013. We tested associations between mental illness diagnoses (depression, posttraumatic stress disorder, anxiety, bipolar disorder, schizophrenia, adjustment disorder) without or with SUD diagnoses (drug/alcohol abuse) and 12-month contraceptive adherence (number and length of gaps = 7 days between refills and months of contraceptive coverage) using multivariable regression models. RESULTS: Among 9780 Veterans, 43.6% had mental illness alone, 9.4% comorbid mental illness and SUD, and 47.0% neither diagnosis. In adjusted analyses, compared to women with neither diagnosis, women with mental illness alone had a similar rate of gaps but increased odds of having gaps longer than 30 days [odds ratio (OR): 1.35, 95% confidence interval (CI): 1.10-1.52] and fewer months of contraceptive coverage (ß_coefficient: -0.39, 95% CI: -0.56 to -0.23). Women with mental illness and SUD experienced more gaps (incidence rate ratio: 1.12, 95% CI: 1.03-1.21), increased odds of gaps longer than 30 days (OR: 1.46, 95% CI: 1.10-1.79), fewer months of contraceptive coverage (ß_coefficient: -0.90, 95% CI: -1.20 to -0.62) and reduced odds of continuous 12-month coverage (adjusted OR: 0.76, 95% CI: 0.63-0.93). CONCLUSIONS: Mental illness, particularly with comorbid SUD, is associated with reduced contraceptive adherence and continuation among women Veterans. Women with these risk factors could potentially benefit from use of long-acting reversible methods. IMPLICATIONS: Women Veterans have a high burden of mental illness and SUD, which we found are associated with inconsistent contraceptive use. Efforts to improve adherence to hormonal contraceptives and to increase availability of long-acting reversible methods in this vulnerable population are warranted.





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