9.1 Social Determinants of Health and Health Equity

9.1 Social Determinants of Health and Health Equity

Exam Focus: The PEBC Pharmacist Evaluating Examination evaluates a candidate's understanding of how social, economic, and environmental factors influence drug therapy outcomes. Pharmacists must differentiate between health equality and health equity, identify cost-related non-adherence (CRNA), apply plain-language communication and teach-back strategies, and design patient-centred care plans for marginalized and structurally vulnerable populations.

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The Foundation of Health Equity: Equity versus Equality

In Canadian healthcare and pharmacy practice, achieving optimal therapeutic outcomes requires understanding the critical distinction between health equality and health equity.

• Health Equality: Providing identical resources, clinical services, and information to all individuals regardless of their baseline socioeconomic status, physical abilities, or structural barriers. While equality aims for uniformity, it ignores pre-existing disadvantages and often widens existing health disparities.
• Health Equity: Distributing resources, clinical time, and healthcare supports based on individual and population-level needs to ensure that everyone has a fair and just opportunity to achieve their highest possible level of health. Health equity recognizes that individuals starting from disadvantaged positions require distinct, tailored supports to achieve comparable health outcomes.
• Health Disparities / Inequalities: Observable differences in health status, disease prevalence, or mortality between different population groups (which may be biological or social).
• Health Inequities: Differences in health status that are unfair, unjust, avoidable, and systematically produced by social, political, and economic structures.

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|                     EQUALITY VERSUS HEALTH EQUITY                       |
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|  EQUALITY (Uniformity):                                                 |
|  - Every patient receives the exact same 3-minute counseling session    |
|  - Every patient receives printed English-only medication leaflets      |
|  - Outcome: Well-educated patients thrive; marginalized patients fail   |
|                                                                         |
|  HEALTH EQUITY (Fairness & Needs-Based Resource Allocation):            |
|  - Patients with low literacy receive visual pictograms & teach-back    |
|  - Unhoused patients receive blister cards & daily/weekly dispensing    |
|  - Uninsured patients receive generic switching & public plan navigation|
|  - Outcome: Disparities narrow; all patients reach therapeutic goals    |
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In healthcare delivery, horizontal equity refers to equal treatment for individuals with equal need (e.g., two patients with identical bacterial pneumonia receiving equivalent antimicrobial therapy regardless of income). Vertical equity refers to the unequal treatment of unequals to achieve fairer outcomes (e.g., providing subsidized pharmacotherapy, intensive case management, and translation services for low-income or refugee patients compared to affluent, highly literate patients).

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The Social Determinants of Health (SDOH)

The Public Health Agency of Canada (PHAC) and the World Health Organization (WHO) define the Social Determinants of Health (SDOH) as the broad range of personal, social, economic, and environmental factors that determine individual and population health status. Research consistently demonstrates that social and economic factors account for up to 50% of population health outcomes, exceeding the direct impact of healthcare services alone.

1. Income and Wealth Distribution

Income is the single most influential predictor of health status in Canada. Low-income individuals experience higher rates of premature mortality, cardiovascular disease, type 2 diabetes, mental health disorders, and multimorbidity. The biological mechanism linking low socioeconomic status to adverse health is allostatic load—the cumulative physiological wear and tear on the body resulting from chronic neuroendocrine and inflammatory stress responses (elevated cortisol, catecholamines, and pro-inflammatory cytokines).

2. Food Security

Household food insecurity is defined as inadequate or insecure access to food due to financial constraints. In Canada, severe food insecurity is strongly associated with chronic disease instability. For example, a diabetic patient forced to choose between purchasing food or paying for antihyperglycemic medications is at extreme risk of severe hypoglycemia (if taking insulin/sulfonylureas without food) or diabetic ketoacidosis/hyperosmolar hyperglycemic state (if skipping medications to afford food).

3. Housing and Physical Environment

Stable housing is a prerequisite for safe and effective pharmacotherapy. Unhoused individuals face substantial hurdles, including medication theft, loss of identification, lack of secure climate-controlled storage for biopharmaceuticals (such as insulins, biologics, and eye drops requiring refrigeration at $2^\circ\text{C}$ to $8^\circ\text{C}$), and absence of clean water for reconstituting oral suspensions.

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Health Literacy in Canadian Pharmacy Practice

Health literacy is defined by the Canadian Public Health Agency (CPHA) as the ability to access, understand, evaluate, and communicate health information to make informed decisions about health, illness management, and medication use. Approximately 60% of Canadian adults and 88% of seniors have low health literacy, meaning they lack the skills necessary to manage their health and medications independently.

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|                     HEALTH LITERACY SPECTRUM                            |
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|  1. Functional Health Literacy:                                         |
|     Basic reading and writing skills to read labels and instructions    |
|                                |                                        |
|                                v                                        |
|  2. Interactive / Communicative Health Literacy:                        |
|     Social skills to extract information and derive meaning from advice |
|                                |                                        |
|                                v                                        |
|  3. Critical Health Literacy:                                           |
|     Advanced cognitive skills to critically analyze health information  |
|     and navigate complex treatment trade-offs                           |
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Clinical Manifestations of Low Health Literacy

• Inability to interpret prescription auxiliary warning labels (e.g., confusing "Take with food" with "Take on an empty stomach").
• Difficulty calculating medication timing (e.g., interpreting "take every 8 hours" as "take three times at breakfast, lunch, and dinner").
• Inappropriate dosage administration (e.g., swallowing topical capsules, ingesting suppositories, or improperly priming multi-dose inhalers).
• Frequent missed appointments, higher emergency department utilization, and elevated hospital readmission rates.

The Universal Precautions Approach

Pharmacists must apply Health Literacy Universal Precautions: structuring all patient communications under the assumption that any patient may have difficulty understanding health information and navigating the healthcare environment. This prevents subjective stereotyping based on appearance, age, education, or occupation.

Essential Communication Strategies

1. The Teach-Back Method ("Show-Me" Method):
   • A closed-loop communication technique where the pharmacist asks the patient to explain or demonstrate, in their own words, how they will use their medication.
   • Critical Rule: The onus of communication clarity is placed on the practitioner, not the patient (e.g., "I want to make sure I explained everything clearly. Can you show me how you will use this inhaler when you get home?" rather than "Did you understand what I just said?").
2. Plain-Language Counseling:
   • Replace complex medical jargon with accessible everyday vocabulary.
   • Target written educational materials at a 5th to 6th-grade reading level.
   • Avoid vague Latin abbreviations or clinical terms (use "high blood pressure" instead of "hypertension"; "take as needed for severe pain" instead of "PRN").
3. Visual Aids and Pictograms:
   • Utilize standardized visual dosing schedules, color-coded medication charts, and graphic icons representing morning, noon, evening, and bedtime.
   • Provide multi-lingual auxiliary labels or validated translation services for patients with limited English or French proficiency.

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Cost-Related Non-Adherence (CRNA)

Because outpatient prescription medications are excluded from the mandatory definition of insured services under the Canada Health Act, Canada's pharmaceutical coverage landscape is a patchwork of public provincial formularies and private employer-sponsored insurance. Approximately 10% of Canadians (and up to 25% of working-age adults without employer health benefits) experience Cost-Related Non-Adherence (CRNA).

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|                   COST-RELATED NON-ADHERENCE (CRNA)                     |
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|  PATIENT BEHAVIORS DRIVEN BY OUT-OF-POCKET EXPENSES:                    |
|  - Skipping doses to make medication supply last twice as long          |
|  - Splitting unscored tablets unevenly                                  |
|  - Failing to fill original prescriptions (primary non-adherence)       |
|  - Delaying prescription refills until catastrophic symptoms occur      |
|  - Foregoing essential food, heating, or rent to purchase medications   |
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Pharmacist Clinical Interventions to Mitigate CRNA

1. Therapeutic and Generic Substitution:
   • Substitute brand-name medications with bioequivalent generic products where permitted by provincial pharmacy acts.
   • Identify lower-cost therapeutic alternatives within the same pharmacological class (e.g., substituting an expensive newer ARB/statin with an equally effective generic ACE inhibitor/statin on the provincial public formulary).
2. Navigation of Public Catastrophic Drug Programs:
   • Assist patients in applying for provincial income-tested catastrophic drug assistance programs (e.g., the Ontario Drug Benefit Trillium Drug Program, BC Fair PharmaCare, Alberta Non-Group Coverage, Saskatchewan Special-Support Program).
3. Manufacturer Patient Support Programs (PSPs):
   • Coordinate bridge funding, co-pay assistance cards, and compassionate supply programs offered by pharmaceutical manufacturers for specialty biologics and oncology medications.
4. Optimization of Dispensing Intervals and Fees:
   • Coordinate 90-day to 100-day maintenance supplies for stable chronic conditions to minimize recurring per-fill dispensing fees.
   • Coordinate synchronized refill schedules (medication synchronization) to consolidate pharmacy visits.
5. Pill Splitting with Professional Supervision:
   • When clinically safe and approved by the prescriber, split higher-strength scored tablets (e.g., 20 mg scored tablet split to yield 10 mg daily dose) to reduce monthly drug costs.
   • Contraindication: Modified-release (XR, ER, CR, SR), enteric-coated, narrow-therapeutic-index, or unscored/friable dosage forms must never be split.

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Caring for Structurally Marginalized Populations

Individuals Experiencing Homelessness

• Regimen Simplification: Prioritize once-daily dosing regimens and eliminate complex multidrug titration schedules.
• Storage Adaptations: Avoid temperature-sensitive medications requiring refrigeration whenever viable (e.g., selecting room-temperature stable GLP-1 receptor agonists or oral agents instead of multi-dose basal-bolus insulin regimens if safe).
• Packaging Solutions: Utilize compliance blister cards or daily/weekly dispensing intervals to prevent medication theft, loss, or unintentional overdose in shelter environments.
• Community Collaboration: Coordinate directly with inner-city community health centres, street outreach nurses, and supervised consumption sites.

2SLGBTQIA+ Populations

• Inclusive Practice Environment: Use gender-neutral intake forms, display affirming signage, and record chosen names and correct pronouns in the pharmacy management system.
• Gender-Affirming Hormone Therapy (GAHT): Support feminizing regimens (estradiol, cyproterone, spironolactone) and masculinizing regimens (testosterone esters) through regular monitoring of serum levels, lipid panels, hematocrit, bone density, and cardiovascular risk.
• Stigma-Free Sexual Health Services: Provide confidential access to HIV Pre-Exposure Prophylaxis (PrEP), Post-Exposure Prophylaxis (PEP), emergency contraception, and harm reduction supplies without judgment.

Immigrants, Refugees, and Migrant Workers

• Interim Federal Health Program (IFHP): Navigate federal drug benefit coverage administered via Medavie Blue Cross for eligible resettled refugees and protected persons.
• Trauma-Informed Care: Recognize the impact of war, displacement, and systemic oppression on health behaviors and therapeutic compliance.