7.1 Evidence-Based Interventions & Expected Outcomes

ANCC GERO-BC Domain II (Planning, Implementation, and Evaluation), knowledge area II-A-1 (evidence-based interventions and expected outcomes), tests whether you can choose interventions grounded in best available evidence and define outcomes that show the plan worked—or needs revision. On exam items, “best next intervention” is rarely the most invasive or familiar option; it is the option supported by geriatric evidence and matched to a clear, measurable goal.

What “Evidence-Based” Means in Gerontological Nursing

Evidence-based practice (EBP) integrates three sources:

1. Best available research evidence — systematic reviews, clinical practice guidelines, and well-designed trials relevant to older adults
2. Clinical expertise — including gerontological assessment skill and recognition of atypical presentations
3. Patient/family values and preferences — goals, culture, advance directives, and what “better” means for this person

Ignoring any one source produces weak care. A guideline-recommended intervention that the older adult refuses is not implemented care. A preferred intervention that contradicts Beers Criteria or fall-prevention evidence may create harm. GERO-BC expects you to hold all three in tension.

Evidence hierarchy (practical view for exam items)

When two options both sound reasonable, prefer the one tied to a recognized geriatric guideline or multimodal prevention bundle over a single unproven action.

Linking Interventions to Expected Outcomes

An intervention without an outcome is incomplete. An outcome without a timeframe or measure is not evaluable. Use SMART framing adapted to aging care:

• Specific — what will change (e.g., “independent toilet transfers with stand-by assist,” not “better mobility”)
• Measurable — scale, count, or functional criterion (PHQ-9 score, fall count, Braden trend, ADL score)
• Achievable — realistic given frailty, cognition, and resources
• Relevant — aligned with the older adult’s goals (remain at home, control dyspnea, reduce nighttime confusion)
• Time-bound — reassessment point (48 hours for delirium prevention fidelity; 2 weeks for antidepressant response monitoring; 30 days for CHF readmission risk)

Outcome domains that matter more than lab numbers alone

GERO-BC often prefers functional and safety outcomes over purely physiologic targets when both appear as choices—especially when the physiologic target ignores quality of life or goals of care.

Selecting Interventions: A Decision Sequence

1. Clarify the problem from assessment (risk, diagnosis, or syndrome)—e.g., high fall risk, uncontrolled heart failure symptoms, new confusion.
2. Identify reversible contributors before adding complexity (infection, constipation, sensory deficit, medication toxicity).
3. Match intervention intensity to acuity and setting (hospital HELP-style delirium prevention vs. home fall-hazard modification).
4. Prefer multimodal bundles when evidence supports them (delirium prevention, pressure-injury prevention, CHF self-management) over isolated single actions.
5. Incorporate preference and capacity — teach-back, simplified regimens, caregiver partnership.
6. Define expected outcomes and evaluation timing before implementation ends.
7. Document intervention, rationale, teaching, and response so the next clinician can evaluate continuity.

Common GERO-BC intervention families (II-A-1 lens)

Implementation Fidelity and Barriers

Selecting the right intervention is not enough—fidelity (was it actually delivered as intended?) determines outcomes. Barriers common in older-adult care include:

• Sensory impairment limiting teaching
• Cognitive impairment limiting self-management
• Caregiver unavailability or burnout
• Cost, transportation, and pharmacy access (SDOH)
• Conflicting goals among family members
• Staffing and workflow gaps that break prevention bundles

When outcomes are unmet, do not automatically escalate to more medication or restraints. Reassess: Was the intervention evidence-based for this problem? Was it delivered? Was the outcome realistic? Did a new acute problem intervene (infection, grief, hearing-aid loss)?

Evaluation and Plan Revision

Evaluation closes the Domain II loop:

1. Compare current status to the predefined expected outcome.
2. Classify: met / partially met / unmet.
3. If unmet, identify cause (wrong intervention, poor fidelity, new risk, preference change).
4. Revise the plan—intensify, simplify, substitute, or change goals of care when appropriate.
5. Communicate changes across the team and to the older adult/caregiver.

Person-centered revision may mean shifting from restorative goals to comfort-focused goals when disease trajectory or preference changes. That shift is still evidence-based when guided by palliative evidence and the person’s values.

Exam Focus

GERO-BC items under II-A-1 typically ask which intervention is most evidence-based, which outcome best evaluates a plan, or what to do when outcomes are not met. Prefer guideline-aligned multimodal strategies, measurable functional/safety outcomes with timeframes, and revision based on barriers—not blame, premature pharmacologic escalation, or vague goals such as “improve status.”