Health outcomes • real-world evidence • pharmacoepidemiology

Omokhodion Alfred Eriakha

Research focused on how medicines are used in real populations, how patient beliefs shape treatment decisions, and how administrative health data can inform safer, more effective care.

Real-world evidenceHealth outcomes researchMedicaid & Medicare claimsMedication usePatient behaviorPharmacoepidemiology

Selected research

Peer-reviewed publications, conference research and graduate work associated with the University of Mississippi Department of Pharmacy Administration and collaborators in public health and payer research.

Peer-reviewed article • Pain Management • 2026

Concomitant use of prescription opioids and psychotropic medications: analysis of Mississippi Medicaid members

Cross-sectional claims analysis of Mississippi Medicaid members from 2016–2021 examining prevalence and intensity of opioid–psychotropic medication overlap.

82,550eligible members in 2016
33.8%concomitant-use prevalence in 2021
84.3%mean co-use intensity in 2021
Peer-reviewed article • BMJ Open • 2023

Antecedent statin use and mortality among Mississippi Medicaid beneficiaries with COVID-19

Cohort study using propensity-score matching to evaluate 30-, 60- and 90-day all-cause mortality.

ISPOR / Value in Health • 2024

Beliefs and factors associated with intentions to initiate antihypertensive medications

Patient-centered research integrating the Health Belief Model and Theory of Planned Behavior in a 941-participant survey.

ISPOR / Value in Health • 2024

End-of-life costs among older adults living with HIV

Medicare claims research examining end-of-life costs and major cost components among older adults living with HIV.

Graduate research

The University of Mississippi's institutional repository indexes Eriakha's graduate thesis on treatment initiation and medication nonadherence.

University of Mississippi • Electronic Thesis • 2023

Beliefs and Factors That Influence Intentions to Initiate Antihypertensive Medications

The study examined how attitudes, subjective norms, perceived behavioral control and health beliefs relate to intentions to start antihypertensive therapy, using relative-weight analysis to identify the most influential predictors.

Research themes

Real-world data & payer populations

Analyses using Medicaid and Medicare administrative claims to characterize medication use, outcomes, utilization and costs.

Patient-centered medication research

Work examining beliefs, behavioral constructs and decision factors that may influence treatment initiation and medication use.

Epidemiology educational guides

Original plain-language educational syntheses prepared by Omokhodion Alfred Eriakha from cited chapters in the Handbook of Epidemiology. The diagrams and charts are author-created illustrations.

Continuous covariates & dose-effect analysis

Understanding Dose & Risk

How epidemiologists analyze continuous exposures, model dose-response relationships and avoid misleading categorization.

Foundations of epidemiology

Basic Concepts: Cause and Effect

A plain-language guide to causal reasoning, measures of disease and effect, confounding, bias and epidemiologic inference.

Advanced quantitative methods

Bayesian Methods in Epidemiology

An accessible introduction to priors, likelihoods, posterior inference, model checking and spatial disease mapping.

Causal inference

Causal Directed Acyclic Graphs

How DAGs make causal assumptions explicit and guide decisions about confounding, colliders and adjustment sets.

Causal inference

Causal Reasoning and Inference in Epidemiology

How epidemiologists move from association to intervention-based causal questions and assess whether an estimate can support a causal interpretation.

Observational study design

Cohort Studies

How researchers define exposure groups, follow populations over time and estimate disease occurrence and comparative risk.

Bias and effect heterogeneity

Confounding and Interaction

How confounding can distort comparisons and how interaction reveals when an exposure's effect differs across populations or settings.

Measurement methods

Exposure Assessment

How researchers define and measure exposures, evaluate error and translate complex contact histories into analyzable variables.

Longitudinal and clustered data

Generalized Estimating Equations

How researchers estimate population-average relationships when observations are repeated within people or clustered within groups.

Health systems and outcomes

Health Services Research

How researchers study access, quality, utilization, cost and outcomes across healthcare systems.

Research methods and health outcomes guides

Teaching slide decks prepared by Omokhodion Alfred Eriakha from cited sources, covering real-world evidence, pharmacoepidemiology, health economics, patient-centered outcomes and causal inference.

Real World Evidence

Encounter Databases

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Pharmacoepidemiology

Studies of Drug Utilization

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Real World Evidence

Comparative Effectiveness Research

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Pharmacoepidemiology

The Use of Pharmacoepidemiology to Study Beneficial Drug Effects

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Health Economics

The Economics of Pharmaceuticals

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Pharmacoepidemiology

Studies of Medication Adherence

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Patient Centered Outcomes

Patient Engagement and Patient-Reported Outcomes

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Causal Inference

Advanced Approaches to Controlling Confounding

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Causal Inference

Experiments and Generalized Causal Inference

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Epidemiology

Modern Epidemiological Study Designs

A plain-language teaching slide deck prepared by Omokhodion Alfred Eriakha, with sources cited in the slides.

Research profiles

Verified and public scholarly profiles that identify Omokhodion Alfred Eriakha and connect this site to the wider research record.

Scholarly name variants include Omokhodion Eriakha, Alfred Eriakha, Alfred Omokhodion Eriakha and O. Eriakha.

Citation profile

Google Scholar

Public author profile with verified University of Mississippi email.

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Research network

ResearchGate

Claimed research profile and publication record.

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Open research portfolio

GitHub

Evidence Courtroom reproducible research, analytical workflows and technical documentation.

View GitHub repository