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GERICLINICS

GeriQBank · Paper III · Q3

Clinical Frailty Scales

Moderate YieldAsked ×17-mark note
Topic
Frailty & Sarcopenia
Chapter
Frailty, Sarcopenia, Deconditioning & Biology of Ageing
Years asked
Not recorded in the source
Frequency
Set 1× in Paper III (2009–2025)

As set in the university paper

  • Clinical frailty scales.

    Paper III · Geriatric Assessment, Frailty & Sarcopenia · asked ×1 · 7-mark note · see in paper list

Answer framework

  1. Two conceptual models — the phenotype model and its tools; the cumulative deficit model and its tools
  2. Frailty Index and Clinical Frailty Scale — calculation and cut-off; CFS grades and uses
  3. Other tools — FRAIL, SOF index, Frailty Trait Scale; function and mobility measures
  4. Choosing and interpreting a scale — the principle of hierarchy; social context; poor agreement between scales
  5. Biomarkers and imaging
  6. Practical comparison of the common scales
  7. Recent updates — CFS 2.0; limits of validity; eFI and Hospital Frailty Risk Score; embedded uses; decision aids, not rationing; ICOPE; Indian validation

An exam answer plan drawn from the detailed answer below. Use it to attempt the question first.

Detailed answer

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Attempt it firstOutline your answer as a 7-mark note before revealing it — definition, causes, evaluation, management and the geriatric angle.Reveal answer

Short revision answer

  • Frailty tools follow two models. Phenotype (a biological syndrome preceding disability): Fried, Frailty Trait Scale, FRAIL. Cumulative deficit (accumulated diseases and losses): the Frailty Index and the Clinical Frailty Scale.
  • Frailty Index (Mitnitski and Rockwood) = deficits present ÷ deficits counted (usually 30–70); ≥0.25 = frail; a ceiling of about 0.7 is observed.
  • Clinical Frailty Scale (Rockwood, 2005): a 9-point pictorial judgement — 1 very fit, 2 fit, 3 managing well, 4 very mild frailty, 5 mild, 6 moderate, 7 severe, 8 very severe, 9 terminally ill (<6 months); ≥5 = frail. Quick, needs no equipment, predicts institutionalisation and death.
  • FRAIL (five questions, no equipment, drives a management algorithm); the SOF index (three items, predicts falls, fracture and death as well as longer tools); the Frailty Trait Scale (continuous). Function: Katz, Lawton and Barthel; mobility: Tinetti and the TUG.
  • Hierarchy: measure frailty in the robust and pre-frail, and ADLs in those already dependent — not both. Interpret with social context (carer, network, participation). Agreement across 35 published scores is poor, so no single scale is universally accepted.
  • No single biomarker works (IL-6, TNF-α, CRP, testosterone, vitamin D, albumin, DNA methylation and others studied); white matter hyperintensities are associated with frailty.
  • Best uses: Fried — research reference; FRAIL — clinic and community screening; Frailty Index — risk stratification in records; CFS — acute, surgical and critical care; Edmonton — preoperative, multidimensional; PRISMA-7 — primary-care case-finding; gait speed <0.8 m/s or TUG ≥20 s — single-item screens.
  • Updates: CFS 2.0 wording ("living with very mild / mild / moderate / severe frailty"); valid only at 65+ and not in stable lifelong disability (a COVID-19 triage lesson); the electronic Frailty Index and Hospital Frailty Risk Score automate case-finding; CFS now guides perioperative, TAVI, oncology, dialysis and ICU decisions — as a trigger for CGA and shared decisions, not rationing.
  • WHO ICOPE (2nd edition, 2025) screens intrinsic capacity in six domains — the entry point in low- and middle-income settings and relevant to NPHCE. Hindi and regional versions of Edmonton, Tilburg and FRAIL exist, but national surveys use the modified Fried phenotype.

Condensed by GeriClinics from the detailed answer below, with no new facts added.

15–20 High-Yield Points (Textbook)

1.

Frailty measurement tools derive from two different conceptual models, and the choice of scale follows the model chosen.

2.

Phenotype model — frailty is a distinct biological syndrome preceding disability. Tools: Fried's phenotype, Frailty Trait Scale, FRAIL index. Endorsed by the ADVANTAGE Joint Action consortium and the ICFSR.

3.

Cumulative deficit model — frailty is the accumulation of deficits (diseases, functional losses, organ and sensory impairments) with age. Tools: Frailty Index and the Clinical Frailty Scale.

4.

Rockwood defined frailty as an increasing number of disabilities, which can be regarded as a comorbidity index.

5.

Frailty Index (Mitnitski and Rockwood): the proportion of deficits present out of the total number counted (usually 30–70 items). A value of 0.25 or above indicates frailty; a submaximal limit of about 0.7 is observed.

6.

Clinical Frailty Scale (Rockwood, CMAJ 2005): a global clinical judgement measure of fitness and frailty, scored on a 9-point pictorial scale.

7.

CFS grades: 1 Very fit, 2 Fit/Well, 3 Managing well, 4 Living with very mild frailty (formerly "vulnerable"), 5 Mildly frail, 6 Moderately frail, 7 Severely frail, 8 Very severely frail, 9 Terminally ill (life expectancy under 6 months).

8.

CFS is quick, needs no equipment, and predicts institutionalisation and death; it has also been adapted for nursing home residents.

9.

The FRAIL scale is a five-item questionnaire usable in the clinic without equipment (fatigue, resistance, ambulation, illnesses, loss of weight) and forms the basis of a management algorithm.

10.

The SOF index (weight loss, inability to rise from a chair five times without arms, reduced energy) is a validated three-item alternative shown to predict falls, disability, fracture and death as well as longer indices.

11.

The Frailty Trait Scale offers a continuous rather than categorical operational definition.

12.

Function is assessed alongside frailty with Katz ADL, Lawton IADL and Barthel Index; mobility and fall risk with the Tinetti performance-oriented assessment and the Timed Up and Go.

13.

Principle of hierarchy in choosing a scale: assess frailty in the robust and pre-frail; assess ADLs in those already dependent. Do not do both.

14.

Frailty status must always be interpreted with environmental and social information — caregiver support, social network, participation — usually gathered by a nurse or social worker.

15.

Agreement between different frailty scales is limited (35 published scores show poor concordance), which is the main reason no single scale is universally accepted.

16.

No single biomarker is adequate for frailty; those studied include TNF-α, IL-6, CRP, HbA1c, testosterone, DHEA, IGF-1, vitamin D, PTH, the CD4/CD8 ratio, haemoglobin, albumin, soluble RAGE, DNA methylation and microRNA.

17.

Neuroimaging markers are little studied, but greater white matter hyperintensity volume and loss of white matter integrity are associated with frailty.

Practical Comparison of Common Scales

Scale Model Content Best use

Fried phenotype Phenotype 5 physical items, needs dynamometer and Research reference standard walk course FRAIL scale Phenotype 5 questions, no equipment Clinic and community screening; drives management algorithm SOF index Phenotype 3 items including chair rise Rapid screening, epidemiology Frailty Index Deficit 30–70 deficits, continuous score 0–1 Risk stratification, electronic health records accumulation Clinical Frailty Scale Deficit 9-point pictorial global judgement Acute hospital, surgical and critical care accumulation / triage clinical judgement Edmonton Frail Scale Multidimensional 9 domains including cognition and mood Preoperative and multidimensional assessment PRISMA-7 / Screening 7 questions / clinician gestalt Primary care case-finding Gérontopôle tool Gait speed / TUG Performance 4 m walk; TUG Single-item screen (<0.8 m/s, TUG ≥20 s)

Latest Updates (2023–Present)

CFS version 2.0 is the current wording: level 4 is now "living with very mild frailty" and levels 5–8 are phrased as "living with mild / moderate / severe / very severe frailty", removing stigmatising language. The CFS is only validated in people aged 65 and above and should not be applied to younger adults or to those with stable lifelong disability (cerebral palsy, intellectual disability), where it misclassifies stable disability as frailty — a point emphasised after its widespread use in COVID-19 triage.

The electronic Frailty Index (eFI), calculated automatically from primary care records, is now used for population-level case-finding; the Hospital Frailty Risk Score, derived from ICD-10 codes at discharge, does the same for hospital data.

CFS is now embedded in routine practice for perioperative risk assessment, TAVI and cardiac surgery selection, oncology fitness assessment, dialysis decision-making and critical care admission. Frailty scales are increasingly used as decision aids rather than diagnoses — a high CFS should trigger comprehensive geriatric assessment and shared decision-making, not automatic withholding of treatment. The WHO ICOPE (2nd edition, 2025) screening tool is being promoted as the entry point in low- and middle-income settings, measuring intrinsic capacity across six domains rather than frailty as such — directly relevant to NPHCE implementation in India.

Indian validation work has established Hindi and regional-language versions of the Edmonton Frail Scale, Tilburg Frailty Indicator and FRAIL scale, but the modified Fried phenotype remains the instrument used in national surveys.

Current Practice Update

Issue Textbook (Pathy 6e) Current Evidence

CFS wording Original 2005 labels including "vulnerable" CFS 2.0 wording: "living with very mild/mild/moderate/severe frailty"

Population limits Not specified CFS not valid below age 65 or in stable lifelong disability Frailty Index Manual count of deficits Automated eFI from primary care records and Hospital Frailty Risk Score from ICD-10 data Purpose Classification and prognosis Used as a trigger for CGA and shared decision-making, explicitly not as a rationing tool Screening framework Frailty scales WHO ICOPE intrinsic capacity screening as the primary-care entry point Exam One-Liners Two models: phenotype (Fried, FRAIL, Frailty Trait Scale) and cumulative deficit (Frailty Index, CFS). Frailty Index = deficits present / deficits counted; frail at ≥0.25; ceiling about 0.7. CFS = 9 points, 1 very fit to 9 terminally ill; ≥5 = frail.

Agreement between published frailty scales is poor — the main unsolved problem in the field. Single best one-item screen = gait speed <0.8 m/s.

CFS must not be used below age 65 or in stable lifelong disability.

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