PN / LVN Focused

Geriatric Assessment & Atypical Presentation

Assessing an older adult isn't just a smaller version of assessing anyone else. The focus shifts to function, and illness often hides behind atypical signs. This guide covers the function-first approach, atypical presentation, ADLs vs IADLs, and the screening tools you'll use.

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01

A Function-First Approach

Geriatric assessment looks at the whole person, and centers on function — what the older adult can actually do. Function is treated almost like a vital sign because it predicts independence and outcomes.

  • Function over a single diagnosis — the goal is maintaining independence and quality of life, not just treating one disease.
  • Expect complexity — multiple chronic conditions, polypharmacy, and sensory/cognitive changes all interact.
  • Track change — a new decline in function is often the earliest sign that something is wrong.
"Function is the geriatric vital sign"

When an older adult "isn't doing what they used to," that's clinically meaningful. Always ask what they can do now versus a few weeks ago — a change in function is a signal to investigate.

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02

Atypical Presentation

Atypical presentation is the high-yield trap: in older adults, serious illness often shows up without the classic symptoms.

Infection
New confusion, a fall, or incontinence — often with little or no fever — instead of obvious infection signs (UTI and pneumonia are common culprits).
Heart attack
May be "silent" or present as shortness of breath, fatigue, or weakness rather than crushing chest pain.
Many illnesses
Show up first as functional decline, decreased appetite, falling, or "just not acting right."
A sudden change in mental status is a vital sign

Treat new confusion, a new fall, or sudden functional decline as a possible sign of acute illness and assess for a cause — don't attribute it to aging. (More in Normal Age-Related Changes.)

03

ADLs vs IADLs

Functional assessment splits into basic self-care (ADLs) and the more complex skills of independent living (IADLs).

ADLs — basic self-care (Katz)

Bathing

Dressing

Toileting

Transferring (bed to chair)

Continence

Feeding (eating)

IADLs — independent living (Lawton)

Shopping

Managing finances

Managing medications

Using the telephone

Preparing meals & housekeeping

Laundry & transportation

IADLs usually fail first

The complex tasks (finances, medications, cooking) tend to slip before basic self-care does. So trouble managing money or pills can be an early warning of cognitive or functional decline — worth a closer look.

? Is "managing medications" an ADL or an IADL — and why does the distinction matter?
Managing medications is an IADL (instrumental activity of daily living) — one of the complex skills for independent living, along with finances, shopping, and cooking. It matters because IADLs usually decline before basic ADLs, so difficulty with medications can be an early sign of cognitive or functional decline that warrants assessment.
04

Cognitive & Mood Screening

Because confusion and depression are common — and often missed — older-adult assessment routinely screens cognition, delirium, and mood.

CognitionMMSE / MoCA
Screens overall thinking and memory; helps detect and track dementia.
DeliriumCAM
The Confusion Assessment Method — quick bedside screen for acute, fluctuating confusion. (See the 3 D's.)
MoodGDS
The Geriatric Depression Scale — a simple yes/no tool built for older adults.
05

Key Screening Tools

A quick map of the tools you'll see — each targets a specific high-risk area in older adults. Match the tool to what it screens.

Katz Index
Basic ADLs (self-care).
Lawton Scale
IADLs (independent-living skills).
MMSE / MoCA
Cognition / dementia screening.
CAM
Delirium (acute confusion).
Geriatric Depression Scale
Depression / mood.
Braden Scale
Pressure-injury risk.
Morse Fall Scale / Hendrich II
Fall risk. (See Falls.)
Mini Nutritional Assessment
Nutrition / malnutrition risk.
06

Communication Tips

Good assessment depends on good communication — and aging vision, hearing, and processing speed all need accommodating.

  • Allow extra time and don't rush; give the person time to process and answer.
  • Reduce barriers — ensure glasses and hearing aids are in, face the patient, and lower your pitch rather than shouting.
  • Minimize distractions — a quiet, well-lit room.
  • Speak respectfully — address adults by name, never "sweetie"; avoid "elderspeak" (baby talk).
  • Ask about goals and values — what matters to the patient guides the plan.
Lower your pitch for presbycusis

Age-related hearing loss affects high-frequency sounds first, so shouting (which raises pitch) often doesn't help. Face the patient, speak clearly at a lower pitch, and reduce background noise.

07

Frequently Asked Questions

Common student questions on this topic.

What makes geriatric assessment different from assessing a younger adult?
Geriatric assessment focuses on the whole person and especially on function — what the older adult can actually do — rather than on a single disease. Functional status is treated almost like a vital sign because it predicts independence, recovery, and outcomes. Assessment also accounts for atypical presentation (illness showing up as confusion, falls, or functional decline instead of classic symptoms), multiple chronic conditions, polypharmacy, and the sensory and cognitive changes of aging.
What is the difference between ADLs and IADLs?
ADLs (activities of daily living) are the basic self-care tasks, often remembered with the Katz Index: bathing, dressing, toileting, transferring, continence, and feeding. IADLs (instrumental activities of daily living), measured by the Lawton scale, are the more complex skills needed to live independently: shopping, managing finances, managing medications, using the telephone, preparing meals, housekeeping, doing laundry, and arranging transportation. IADLs usually decline before basic ADLs, so trouble with finances or medications can be an early warning sign.
What is atypical presentation in older adults?
Atypical presentation means illness in older adults often shows up differently than the textbook picture. Instead of classic symptoms, an older adult may present with new confusion, a fall, incontinence, decreased appetite, or simply "not acting right," and serious infection can occur with little or no fever. A heart attack may be "silent" or show as shortness of breath or fatigue rather than chest pain. Because of this, a sudden change in function or mental status should always prompt a search for an underlying cause.
What screening tools are commonly used with older adults?
Common tools include the Katz Index for basic ADLs and the Lawton scale for IADLs; the MMSE or MoCA for cognition; the Confusion Assessment Method (CAM) for delirium; the Geriatric Depression Scale (GDS) for mood; the Braden Scale for pressure-injury risk; the Morse Fall Scale or Hendrich II for fall risk; and the Mini Nutritional Assessment (MNA) for nutrition. Each targets a specific high-risk area common in older adults.
Why is functional status so important in older adults?
Functional status — the ability to perform daily activities — is one of the best predictors of an older adult's health, independence, need for services, and recovery. It is also sensitive to change: a sudden decline in function, such as no longer being able to cook or dress, is frequently the first sign of an acute illness like infection. That's why nurses assess and track function closely and investigate any new functional decline.
08

Quick-Reference Cheatsheet

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Geriatric Assessment Cheatsheet

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