Frailty Screening — Identifying Those at Risk Before It's Too Late

She is 78, lives at home, has hardly any chronic conditions, and manages her three medications well. And during the appointment, she says almost in passing, “Actually, I’m doing fine. It’s just—I get tired so quickly.” A statement that’s easy to overlook. But one that’s often the first clinical sign of incipient frailty.

Frailty syndrome doesn’t develop overnight. It announces itself over months and years—through small, inconspicuous changes. Those who recognize these signs can intervene. Those who overlook them will find themselves, months later, facing a patient who can no longer get back on their feet after a minor surgery or a harmless infection.

As a geriatrician, I therefore do not view frailty screening as an additional burden, but as a central diagnostic tool. It reveals what would otherwise only become apparent in a crisis. And it opens a window of opportunity during which intervention is still possible and effective.

What is frailty screening?

Frailty screening is the systematic identification of frailty—the clinical condition of reduced reserves that makes patients particularly vulnerable to falls, illnesses, surgical complications, and the need for long-term care. The screening has three objectives:

• Early identification: Before the clinical consequences become apparent.
• Risk stratification: How high is the risk associated with planned treatments?
• Intervention guidance: Which measures should be prioritized for this patient?

→ For an overview of frailty syndrome: Frailty Syndrome.

The most important screening tools

SARC-F — the 30-second test

Five simple questions that a patient or caregiver can answer. Each question is scored 0, 1, or 2 points:

• How much strength do you have? (Can you lift and carry 4.5 kg?)
• Can you walk across a room? (Mobility)
• Can you stand up from a chair? (Chair Rise)
• Can you climb a flight of 10 stairs?
• Have you fallen in the past year?

A score of 4 or higher indicates suspected sarcopenia/frailty. Very simple and suitable for self-assessment. Use as a starting point for further evaluation.

Clinical Frailty Scale (CFS) — the clinical overview

Nine categories ranging from “very fit” (CFS 1) to “dying” (CFS 9). The assessment is conducted through a brief conversation with the patient and their family members. Key thresholds:

• CFS 1–3: Robust — normal daily activities.
• CFS 4: Vulnerable — experiences discomfort during exertion but is still independent.
• CFS 5: Mild frailty — needs help with more complex activities (shopping, managing finances).
• CFS 6: Moderate frailty — assistance with daily activities, limited ability to climb stairs.
• CFS 7: Severe frailty — complete dependence for daily activities.
• CFS 8–9: Very severe frailty to terminal.

The CFS has established itself internationally as a rapidly deployable risk assessment tool—particularly before surgeries, in the intensive care unit, and in the emergency department. It has been validated in numerous studies for predicting mortality and complications.

Fried Phenotype — the biological standard

The Fried phenotype was published in 2001 and is the gold standard in research. It defines frailty as the presence of at least three of the following five criteria:

• Unintentional weight loss: 5 percent or more in one year.
• Fatigue: A subjective feeling that “everything is an effort.”
• Muscle weakness: Reduced handgrip strength on a dynamometer (men under 27 kg, women under 16 kg).
• Slow walking: Walking speed below 0.8 m/s over 4 meters.
• Low physical activity: Low weekly energy expenditure.

Three or more criteria = frailty. One or two criteria = pre-frailty. The Fried phenotype is precise but more time-consuming than the other instruments.

Short Physical Performance Battery (SPPB) — the functional test

Three individual tests, each scored 0 to 4 points, for a maximum of 12 points:

• Balance test (standing with feet together, half-offset, and one behind the other)
• 4-meter walking speed
• Chair Rise Test (standing up from a chair five times without using the armrests)

Less than 8 points: suspected frailty. Less than 6 points: significantly increased risk. Very well suited for monitoring progress—the score changes with intervention.

Handgrip strength measurement with a dynamometer

A single test that provides insights into muscle status, overall strength, and frailty risk in just a few seconds. Readings below 27 kg for men and below 16 kg for women are considered abnormal. Studies show that handgrip strength is a robust predictor of mortality and hospitalizations—even when other factors are controlled for.

→ For a detailed overview of sarcopenia screening: Sarcopenia in Older Adults.

When to use which tool?

In the primary care practice

The combination of the SARC-F questionnaire (30 seconds) and the Chair Rise Test or handgrip strength measurement provides a reliable assessment in 3 to 5 minutes. Annual screening is recommended for patients over 70.

In the hospital upon admission

The Clinical Frailty Scale is the pragmatic tool—fast, suitable for team use, and internationally accepted. It is now part of the initial nursing assessment documentation in many hospitals.

Before scheduled surgeries

A combination of the CFS and SPPB. For high-risk procedures, the Fried phenotype is also used. The results are incorporated into the preoperative risk assessment and guide prehabilitation.

→ For preoperative assessment in older adults: Surgical risk in older adults.

In geriatric outpatient clinics

Comprehensive assessment including the Fried phenotype, SPPB, handgrip strength, nutritional screening (MNA), and cognitive testing. The goal is not only categorization but also tailored intervention.

→ For comprehensive geriatric assessment: Geriatric Assessment.

In the emergency department

Brief assessment tools (CFS, SARC-F) help determine the level of care required and initiate geriatric co-management at an early stage.

What does the result indicate?

Robust (no suspicion of frailty)

The patient has full reserves. Scheduled procedures can be performed with standard care. Preventive recommendations such as exercise and a balanced diet remain advisable.

Pre-frailty

The patient has initial limitations but still has reserves. This is the most important window for intervention: strength training, dietary optimization, medication review, and fall risk assessment can prevent or delay the transition to overt frailty.

Manifest Frailty

Significant risk of complications. Prehabilitation is mandatory, not optional, prior to surgery. Medications are critically reviewed, and fall risk is addressed. The treatment goal is individualized—quality of life often takes precedence over aggressive treatment intensity.

Severe Frailty

Often, the goal of care is maintenance rather than restoration. Palliative aspects become increasingly important. Invasive procedures are critically evaluated. Care provided by geriatric palliative care and geriatrics gains greater importance.

→ On palliative care in this phase: Palliative Care in Older Adults.

What follows from the screening? The specific interventions

Screening without follow-up is a waste of time. The most important interventions resulting from positive screening results are:

1. Progressive strength training

The single measure with the strongest evidence. Strength gains of over 100 percent are possible even in old age. Structured resistance training two to three times a week.

2. Protein and nutritional optimization

1.0 to 1.2 g of protein per kg of body weight; 1.2 to 1.5 g in cases of illness. Distributed across three main meals, each containing 25 to 30 g of protein. Nutritional supplements for cases of malnutrition.

3. Structured Medication Review

According to the PRISCUS List 2.0, FORTA, and STOPP/START guidelines. The goal is to reduce medications that increase the risk of falls, contribute to delirium, or are unnecessary. Learn more about structured deprescribing.

4. Fall Assessment and Fall Prevention

Multifactorial intervention: medication review, home environment, vision, strength and balance training. More on fall prevention in older adults.

5. Vitamin D supplementation in cases of deficiency

Moderate improvement in muscle function and reduced risk of falls in cases of confirmed deficiency.

6. Treatment of Comorbidities

Depression, sleep apnea, heart failure in older adults, thyroid problems—anything that contributes to frailty is specifically addressed.

7. Social engagement

Day care, senior centers, structured group activities. Isolation is a major driver of frailty in its own right.

8. Prehabilitation before planned procedures

Strength training, protein optimization, medication adjustment, and cognitive preparation in the weeks leading up to surgery. More on surgical risk in older adults.

→ On sarcopenia as a central biological basis: Sarcopenia.

→ On malnutrition and protein therapy: Malnutrition in older adults.

→ On fall prevention: Fall prevention.

→ On medication reviews: Polypharmacy in older adults and reducing medications.

Common Mistakes in Frailty Screening

• Screening without follow-through: The test is performed, but the results do not lead to any interventions. This is the most common and most serious mistake.
• Inappropriate tools for the setting: The Fried phenotype does not belong in the emergency department. The CFS is not suitable for long-term rehabilitation. Choose the right tool for the question at hand.
• No re-screening: Frailty is a dynamic condition. Regular reassessment is more important than a one-time classification.
• Misunderstanding frailty as inevitable: Pre-frailty and even overt frailty are partially reversible—with the right interventions.
• Failing to involve patients: A screening result that is not explained to the patient will not lead to any behavioral change.

???? The most important question after every frailty screening is not “Which category?” but “What comes next?” Without a concrete intervention plan, every screening is a waste of time—for both the doctor and the patient.

What Family Members Can Do

• Watch for early signs: weight loss, declining stamina, and increasingly frequent exhaustion. This is not “normal aging,” but a reason for further evaluation.
• Request a screening: From your primary care physician, before surgeries, upon hospital admission. Ask, “Has a frailty screening been performed?”
• Support interventions: Joint strength training, exercise sessions, and nutrition planning—this significantly increases the likelihood of sticking with the program.
• Weigh them regularly: Once a month. Unexplained weight loss of 5 percent over three months is a reason to seek medical evaluation.
• Promote social participation: Shared activities, visits, volunteer work—often the underestimated key to stability.

When should you see a geriatrician?

• If you experience new-onset fatigue, weakness, or a decreased ability to cope
• If you experience unintentional weight loss of more than 5 percent over three months
• If you’ve had multiple falls in the past year
• Before planned major surgery if you are over 70
• After a hospital stay resulting in functional impairment
• In cases of polypharmacy involving five or more long-term medications
• When the primary care physician and specialists provide differing assessments

Leading Medicine Guide features a team of experienced geriatricians and specialists who specialize in the structured assessment of older patients. A frailty screening is often the first step toward care that takes a holistic view of a person’s overall situation—not just individual organs or symptoms.

Geriatrics is not the discipline of the final years—it is the discipline of the best final years.