Comprehensive Geriatric Assessment
Also known as: CGA, Geriatric Assessment, Multidimensional Geriatric Assessment, Interdisciplinary Geriatric Evaluation
Comprehensive Geriatric Assessment (CGA) is a multidimensional, interdisciplinary diagnostic process that evaluates an older person's medical, functional, cognitive, psychological, social, and environmental status and translates the findings into a coordinated, monitored plan of care. Rather than treating a single presenting complaint, CGA assumes that vulnerability in late life is multifactorial and that problems in one domain spill over into others. Stuck and colleagues' landmark 1993 meta-analysis of controlled trials showed that CGA is not merely descriptive: when it includes control over the implementation of recommendations and structured follow-up, it reduces mortality, increases the chance of living at home, and improves physical and cognitive function. The same synthesis clarified that assessment alone, without the power to act on findings and to follow patients over time, yields little benefit. CGA thus reframed geriatric care around systematic, team-based evaluation linked to action. It became the organizing model for geriatric medicine units, outpatient geriatric clinics, and home-assessment programs worldwide. The method is best understood as a process, not a single scale, even though it is built from many validated instruments.
Key highlights
- Captures the multifactorial nature of late-life health by systematically covering medical, functional, cognitive, psychological, social, and environmental domains.
- Backed by meta-analytic evidence of reduced mortality and improved function and independence when assessment is coupled with control of care and follow-up.
- Coordinates an interdisciplinary team around a single integrated problem list and care plan rather than fragmented single-system care.
- Flexible process that adapts to inpatient, outpatient, home, and specialty (oncology, surgery) settings.
Intuition
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How it works
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When to use it
Use Comprehensive Geriatric Assessment when an older adult presents with complex, multifactorial problems — recurrent falls, functional decline, frailty, polypharmacy, cognitive concerns, or difficulty living independently — and when a single-system workup is unlikely to capture the interacting causes. It is most appropriate where an interdisciplinary team is available and, critically, where that team can influence the implementation of its recommendations and arrange follow-up, since the evidence shows benefit depends on these conditions. CGA suits inpatient geriatric units, outpatient geriatric clinics, and structured home-visit programs, and is increasingly used to guide treatment decisions in older cancer and surgical patients. It is less justified for a robust older person with a single, well-defined acute problem, or in settings that can assess but cannot act on or monitor the findings, because assessment without control of care yields little. Resource constraints mean it should be targeted at those most likely to benefit, typically frail or at-risk older adults rather than the whole older population.
Strengths & limitations
- Captures the multifactorial nature of late-life health by systematically covering medical, functional, cognitive, psychological, social, and environmental domains.
- Backed by meta-analytic evidence of reduced mortality and improved function and independence when assessment is coupled with control of care and follow-up.
- Coordinates an interdisciplinary team around a single integrated problem list and care plan rather than fragmented single-system care.
- Flexible process that adapts to inpatient, outpatient, home, and specialty (oncology, surgery) settings.
- Resource-intensive, requiring time, a multidisciplinary team, and follow-up infrastructure that many settings lack.
- Benefits depend strongly on program design; assessment without authority to implement recommendations or to follow up shows little effect.
- Heterogeneity across the underlying trials makes a single 'dose' of CGA hard to define and effects vary by model.
- Not a single standardized instrument, so implementations differ in which domains and tools are used, complicating comparison.
Common pitfalls
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Applications
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Frequently asked
Is CGA a single test or scale?
No. CGA is a multidimensional, interdisciplinary process rather than one instrument. It assembles many validated tools — for activities of daily living, cognition, mood, mobility, nutrition, medications, and social and environmental circumstances — and integrates their results into a coordinated care plan. Because it is a process, implementations vary in exactly which instruments are used, but the defining features are breadth of domains, team-based synthesis, and linkage to action.
Why does CGA sometimes fail to show benefit?
The 1993 meta-analysis by Stuck and colleagues found that CGA improved mortality, function, and independence only when the assessing team had control over implementing its recommendations and provided structured follow-up. Programs that merely assessed patients and handed advice to others, without authority to act or to monitor over time, showed little effect. The lesson is that assessment is necessary but not sufficient; follow-through is the active ingredient.
Who should receive a CGA?
Because it is resource-intensive, CGA is best targeted at older adults with complex, multifactorial problems — frailty, recurrent falls, functional or cognitive decline, polypharmacy, or threatened independence — rather than at every older patient. Robust older people with a single well-defined acute issue generally do not need the full process. Targeting those most likely to benefit maximizes the value of the team time and follow-up that CGA demands.
Sources
- 1.Stuck, A. E., Siu, A. L., Wieland, G. D., Adams, J., & Rubenstein, L. Z. (1993). Comprehensive geriatric assessment: a meta-analysis of controlled trials. The Lancet, 342(8878), 1032-1036.
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Cite this page
ScholarGate. (2026, June 23). Comprehensive Geriatric Assessment. ScholarGate. https://scholargate.app/social-gerontology/comprehensive-geriatric-assessment