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Ashley Buchanan

Bio

Dr. Ashley Buchanan is an Associate Professor of Biostatistics in the Department of Pharmacy Practice, specializing in the areas of epidemiology and causal inference. She brings over ten years of experience collaborating on HIV/AIDS research, working closely with colleagues both domestically and internationally to develop and apply causal methodology to improve treatment and prevention of HIV/AIDS. More recently, her substantive research area has expanded to studying opioid use disorder employing a variety of “big data” sources, including administrative claims data and the prescription drug monitoring programs. Her current methodological research focuses on the development and application of causal inference methods for network-based studies of HIV treatment and prevention among people who inject drugs.

Education

Affiliations

Preferred Pronouns

She/her/hers

Personal Academic Website

https://web.uri.edu/ncipher/

Topics of Interest/Expertise
 

Countries of Work/Collaboration

United States
Cyprus
France
South Africa
Botswana

Projects

Network-based study design, statistical, and modeling solutions for HIV among populations that use illicit substances: Informing interventions and policy in real-world settings using existing data

National Institutes of Health, National Institute on Drug Abuse
People: Ashley Buchanan
2024 – 2029 Continue Reading Network-based study design, statistical, and modeling solutions for HIV among populations that use illicit substances: Informing interventions and policy in real-world settings using existing data

Papers

Buchanan A, Pearsall C, Kogut S, Bratberg J, Hogan J, Friedman SR, Katenka N. (2026). Study Design, Methods, and Modeling in Networks to Inform HIV Interventions and Policy in Marginalized Populations. Rhode Island medical journal (2013), 109(7)

Skov B, Buchanan AL, Katenka NV, Hoque Nadia T, Friedman SR, Nikolopoulos GK. (2025). Evaluation of the Relationship Between Network Centrality and Individual Sociodemographics and Behaviors Among People Who Inject Drugs. Substance use & misuse

Ryan V, Lee T, Piovani D, Katenka N, Friedman SR, Bonovas S, Buchanan A, Nikolopoulos G. (2025). Attributes Associated with HIV Risk Behaviors in a Network-Based Study of People Who Inject Drugs. Current HIV research

Ologunowa A, Otoo MN, Caffrey AR, Buchanan A, Eze UJ, Vyas A. (2025). Efficacy of Low-Dose Naltrexone in Treating Patients with Fibromyalgia: systematic Review and Meta-Analysis. Journal of pain & palliative care pharmacotherapy

Fang J, Spiegelman D, Buchanan AL, Forastiere L. (2025). Design of egocentric network-based studies to estimate causal effects under interference. Statistical methods in medical research

Lee T, Buchanan AL, Katenka N, Forastiere L, Halloran ME, Nikolopoulos G. (2025). Assessing spillover effects: Handling missing outcomes in network-based studies. Statistical methods in medical research

Nikolopoulos G, Buchanan A, Katenka N, Bonova E, Pantavou K, Piovani D, Zhang K, Bonovas S, Friedman SR, Fokianos K. (2025). Evaluation of spill-over effects of antiretroviral treatment on sharing injecting equipment in a sociometric network of people who inject drugs. AIDS care, 37(8)

Chao A, Spiegelman D, Buchanan A, Forastiere L. (2024). Estimation and inference for causal spillover effects in egocentric-network randomized trials in the presence of network membership misclassification. Biostatistics (Oxford, England), 26(1)

Buchanan AL, Hernández-Ramírez RU, Lok JJ, Vermund SH, Friedman SR, Forastiere L, Spiegelman D. (2024). Assessing Direct and Spillover Effects of Intervention Packages in Network-randomized Studies. Epidemiology (Cambridge, Mass.)

Puleo J, Buchanan A, Katenka N, Halloran ME, Friedman SR, Nikolopoulos G. (2024). Assessing Spillover Effects of Medications for Opioid Use Disorder on HIV Risk Behaviors among a Network of People Who Inject Drugs. Stats, 7(2)

Parker HW, Oaks BM, Buchanan AL, Vadiveloo MK. (2023). Modified-weight Healthy Eating Index-2015 scores are more strongly associated with mortality risk than standard scores. Journal of the Academy of Nutrition and Dietetics

Kamat S, Kogut S, Buchanan AL, Vyas A. (2023). Evaluation of the association between health insurance status and healthcare utilization and expenditures among adult cancer survivors in the United States. Research in social & administrative pharmacy : RSAP, 19(5)

Buchanan AL, Katenka N, Lee Y, Wu J, Pantavou K, Friedman SR, Halloran ME, Marshall BDL, Forastiere L, Nikolopoulos GK. (2023). Methods for Assessing Spillover in Network-Based Studies of HIV/AIDS Prevention among People Who Use Drugs. Pathogens (Basel, Switzerland), 12(2)

Lee Y, Buchanan AL, Ogburn EL, Friedman SR, Halloran ME, Katenka NV, Wu J, Nikolopoulos GK. (2023). Finding influential subjects in a network using a causal framework. Biometrics

Hernández-Ramírez RU, Spiegelman D, Lok JJ, Forastiere L, Friedman SR, Latkin CA, Vermund SH, Buchanan AL. (2023). Overall, Direct, Spillover, and Composite Effects of Components of a Peer-Driven Intervention Package on Injection Risk Behavior Among People Who Inject Drugs in the HPTN 037 Study. AIDS and behavior

Lee T, Buchanan AL, Katenka NV, Forastiere L, Halloran ME, Friedman SR, Nikolopoulos G. (2023). Estimating Causal Effects of HIV Prevention Interventions with Interference in Network-based Studies among People Who Inject Drugs. The annals of applied statistics, 17(3)

Sun T, Katenka N, Kogut S, Bratberg J, Rich J, Buchanan A. (2022). Evaluation of the Effectiveness of Buprenorphine-Naloxone on Opioid Overdose and Death among Insured Patients with Opioid Use Disorder in the United States. Pharmacoepidemiology, 1(3)

Buchanan AL, Park CJ, Bessey S, Goedel WC, Murray EJ, Friedman SR, Halloran ME, Katenka NV, Marshall BDL. (2022). Spillover Benefit of Pre-Exposure Prophylaxis for HIV Prevention: Evaluating the Importance of Effect Modification using an Agent-Based Model. Epidemiology and infection

Patry E, Upadhyay R, Bratberg J, Buchanan A, Matson KL. (2022). A Comparison of National, State, and Local Drug Use Surveys: The Youth Risk Behavior Survey and the Rx for Addiction and Medication Safety Program. Rhode Island medical journal (2013), 105(1)

Webb AJ, Borrelli EP, Vyas A, Taylor LE, Buchanan AL. (2022). The effect of antiretroviral therapy with high central nervous system penetration on HIV-related cognitive impairment: a systematic review and meta-analysis. AIDS care

Buchanan A, Sun T, Wu J, Aroke H, Bratberg J, Rich J, Kogut S, Hogan J. (2022). Toward evaluation of disseminated effects of medications for opioid use disorder within provider-based clusters using routinely-collected health data. Statistics in medicine

Aroke H, Katenka N, Kogut S, Buchanan A. Network-based Analysis of Prescription Opioids Dispensing Using Exponential Random Graph Models (ERGMs). Complex Networks & Their Applications X. Volume 2 : proceedings of the Tenth International Conference on Complex Networks and Their Applications COMPLEX NETWORKS 2021. International Conference on Complex Networks and Their Applications ..., (1016)

Aroke H, Buchanan A, Katenka N, Crawford FW, Lee T, Halloran ME, Latkin C. (2022). Evaluating the Mediating Role of Recall of Intervention Knowledge in the Relationship Between a Peer-Driven Intervention and HIV Risk Behaviors Among People Who Inject Drugs. AIDS and behavior

Sung ML, Viera A, Esserman D, Tong G, Davidson D, Aiudi S, Bailey GL, Buchanan AL, Buchelli M, Jenkins M, John B, Kolakowski J, Lame A, Murphy SM, Porter E, Simone L, Paris M, Rash CJ, Edelman EJ. (2023). Contingency Management and Pre-Exposure Prophylaxis Adherence Support Services (CoMPASS): A hybrid type 1 effectiveness-implementation study to promote HIV risk reduction among people who inject drugs. Contemporary clinical trials, (125)

Li F, Buchanan AL, Cole SR. (2022). Generalizing trial evidence to target populations in non-nested designs: Applications to AIDS clinical trials. Journal of the Royal Statistical Society. Series C, Applied statistics, 71(3)

Vadiveloo M, Guan X, Parker HW, Perraud E, Buchanan A, Atlas S, Thorndike AN. (2021). Effect of Personalized Incentives on Dietary Quality of Groceries Purchased: A Randomized Crossover Trial. JAMA network open, 4(2)

Lemay V, Hoolahan J, Buchanan A. (2021). Response to Letter to the Editor Commenting on "Impact of a Yoga and Meditation Intervention on Students". American journal of pharmaceutical education, 85(5)

Weyandt LL, Gudmundsdottir BG, Shepard E, Brick L, Buchanan A, Clarkin C, Francis A, Marraccini M. (2021). Nonmedical Prescription Opioid Use among a Sample of College Students: Prevalence and Predictors. Pharmacy (Basel, Switzerland), 9(2)

Murray EJ, Marshall BDL, Buchanan AL. (2021). Emulating Target Trials to Improve Causal Inference from Agent-Based Models. American journal of epidemiology

Sun T, Aroke H, Kogut S, Katenka N, Bratberg J, Buchanan A. (2021). Early buprenorphine-naloxone initiation for opioid use disorder reduces opioid overdose, emergency room visits and healthcare cost compare to late initiation. The American journal of drug and alcohol abuse

Abreu AM, Young RR, Buchanan A, Lofgren IE, Okronipa HET, Lartey A, Ashorn P, Adu-Afarwuah S, Dewey KG, Oaks BM. (2021). Maternal Blood Pressure in Relation to Prenatal Lipid-Based Nutrient Supplementation and Adverse Birth Outcomes in a Ghanaian Cohort: A Randomized Controlled Trial and Cohort Analysis. The Journal of nutrition

Marraccini, ME, Brick, LA, O’Neill, JC, Weynadt, LL, Buchanan AL. (2020). Self-Injurious Thoughts and Behaviors Among College Students: A Latent Class Analysis. Archives of Suicide Research

Buchanan AL, Bessey S, Goedel WC, King M, Murray EJ, Friedman S, Halloran ME, Marshall BDL. (2020). Disseminated Effects in Agent Based Models: A Potential Outcomes Framework and Application to Inform Pre-Exposure Prophylaxis Coverage Levels for HIV Prevention. American journal of epidemiology

Vadiveloo MK, Guan X, Parker HW, Perraud E, Buchanan A, Atlas S, Thorndike AN. (2020). Evaluating the effect of individually-targeted food incentives on grocery purchases: The smart cart study protocol for a randomized controlled cross-over trial. Contemporary Clinical Trials, (91)

Sun T, Buchanan AL, Bratberg JP, Patry E, Matson KL. (2020). Rx for Addiction and Medication Safety (RAMS-PEER): Evaluation of an Education and Peer Program on Opioid Misuse. Preventing chronic disease, (17)

Dahabreh IJ, Haneuse SJPA, Robins JM, Robertson SE, Buchanan AL, Stuart EA, Hernán MA. (2020). Study Designs for Extending Causal Inferences from a Randomized Trial to a Target Population. American journal of epidemiology

Aroke HA, Buchanan AL, Bratberg J, Hogan JW, Rich JD, Wen X, Kogut SJ. (2020). Initial Patterns of Prescription Opioid Supply and Risk of Mortality Among Insured Adults in the United States. Journal of addiction medicine

Lemay V, Hoolahan J, Buchanan A. (2019). Impact of a Yoga and Meditation Intervention on Students' Stress and Anxiety Levels. American journal of pharmaceutical education, 83(5)

Yedinak JL, Goedel WC, Paull K, Lebeau R, Krieger MS, Thompson C, Buchanan AL, Coderre T, Boss R, Rich JD, Marshall BDL. (2019). Defining a recovery-oriented cascade of care for opioid use disorder: A community-driven, statewide cross-sectional assessment. PLoS medicine, 16(11)

Sudfeld CR, Buchanan AL, Ulenga N, Spiegelman D, Mtisi E, Hertzmark E, Muya AN, Sando D, Mungure E, Mizinduko M, Fawzi WW. (2019). Effectiveness of a multivitamin supplementation program among HIV-infected adults in Tanzania. AIDS, 33(1)

Aroke HA, Vyas AM, Buchanan AL, Kogut SJ. (2019). Prevalence of Psychotropic Polypharmacy and Associated Healthcare Resource Utilization during Initial Phase of Care among Adults with Cancer in USA. Drugs - real world outcomes, 6(2)

Dahabreh IJ, Haneuse SJ, Robins JM, Robertson SE, Buchanan AL, Stuart EA, Hernan MA. (2019). Study designs for extending causal inferences from a randomized trial to a target population. arXiv

Crawford FW, Morozova O, Buchanan AL, Spiegelman D. (2019). Interpretation of the Individual Effect Under Treatment Spillover. American journal of epidemiology, 188(8)

Donovan K, Kogut S, Buchanan A, Wen X, Crausman R. A claims analysis of the utilization of tramadol for acute pain in patients prescribed buprenorphine/naloxone for opioid use disorder. Journal of opioid management, 14(6)

Buchanan AL, Hudgens MG, Cole SR, Mollan KR, Sax PE, Daar ES, Adimora AA, Eron JJ, Mugavero MJ. (2018). Generalizing Evidence from Randomized Trials using Inverse Probability of Sampling Weights. Journal of the Royal Statistical Society. Series A, (Statistics in Society), 181(4)

Aroke H, Buchanan A, Wen X, Ragosta P, Koziol J, Kogut S. (2018). Estimating the Direct Costs of Outpatient Opioid Prescriptions: A Retrospective Analysis of Data from the Rhode Island Prescription Drug Monitoring Program. Journal of managed care & specialty pharmacy, 24(3)

Buchanan AL, Vermund SH, Friedman SR, Spiegelman D. (2018). Assessing Individual and Disseminated Effects in Network-Randomized Studies. American journal of epidemiology, 187(11)

Patry E, Bratberg JP, Buchanan A, Paiva AL, Balestrieri S, Matson KL. (2019). Rx for addiction and medication safety: An evaluation of teen education for opioid misuse prevention. Research in social & administrative pharmacy : RSAP, 15(8)

Achenbach CJ, Buchanan AL, Cole SR, Hou L, Mugavero MJ, Crane HM, Moore RD, Haubrich RH, Gopal S, Eron JJ, Hunt PW.. (2014). HIV Viremia and Incidence of Non-Hodgkin Lymphoma in Patients Successfully Treated With Antiretroviral Therapy. Clinical Infectious Diseases, 58(11)

Buchanan AL, Hudgens MG, Cole SR, Lau B, Adimora AA, . (2014). Worth the weight: using inverse probability weighted Cox models in AIDS research. AIDS research and human retroviruses, 30(12)

Rice ML, Buchanan AL, Siberry GK, Malee KM, Zeldow B, Frederick T, Purswani MU, Hoffman HJ, Sirois PA, Smith R, Torre III P. (2012). Language Impairment in Children Perinatally Infected with HIV Compared to Children Who Were HIV-Exposed and Uninfected. Journal of Deviant Behavior Pediatric, 33(2)

Torre III P, Zeldow B, Hoffman HJ, Buchanan AL, Siberry GK, Rice M, Sirois PA, Williams PL. (2012). Hearing Loss in Perinatally Human Immunodeficiency Virus-Infected and Human Immunodeficiency Virus -Exposed but Uninfected Children and Adolescents. The Pediatric Infectious Disease Journal, 31(8)

Buchanan AL, Montepiedra G, Sirois PA, Kammerer B, Garvie PA, Storm DS, Nichols SL. (2012). Barriers to Medication Adherence in HIV-Infected Children and Youth Based on Self- and Caregiver Report. Pediatrics, 129(5)

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