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GERICLINICS

GeriQBank · Paper IV · Q5

Physical Self-Maintenance Scale (PSMS)

Moderate YieldAsked ×16-mark note
Topic
Comprehensive Geriatric Assessment
Chapter
Part I — Comprehensive Geriatric Assessment and Functional Evaluation
Years asked
Not recorded in the source
Frequency
Set 1× in Paper IV (2009–2025)

As set in the university paper

  • Physical Self-Maintenance Scale.

    Paper IV · Comprehensive Geriatric & Functional Assessment · asked ×1 · 6-mark note · see in paper list

Answer framework

  1. Position in geriatric assessment — one of three basic-ADL tools; what it covers; what ADL loss implies; the hierarchy rule
  2. The scale itself — origin and purpose; paired with the IADL scale; age group and versions; the six items; grading and scoring; psychometrics
  3. Comparison with the Katz and Barthel indices
  4. Recent updates — rarely used alone; where it survives; domain-mandated guidelines; Indian context

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 6-mark note before revealing it — definition, causes, evaluation, management and the geriatric angle.Reveal answer

Short revision answer

  • The PSMS is one of three named basic-ADL tools in CGA (with Katz and Barthel), covering self-care, basic mobility and continence — what a person must do to survive in the community without help. Losing basic ADLs usually means needing 12- to 24-hour caregiver support; IADL loss threatens independent living.
  • Use basic-ADL scales in people who are already dependent; in robust or pre-frail people, measure frailty instead.
  • Developed by M. Powell Lawton and Elaine Brody (Philadelphia Geriatric Center, 1969, The Gerontologist) to gauge disability for planning and evaluating care, using observable behaviours. It was published alongside the 8-item IADL scale, is meant for people aged 60 and over, and has observer- and self-rated versions.
  • Six items — Toileting, Feeding, Dressing, Grooming, Physical ambulation, Bathing ("The Frail Do Get Assisted Bathing"). Each is graded on 5 levels (1 independent → 5 dependent) and dichotomised to 1 or 0, giving 0–6; 6 = fully independent, so higher is better.
  • Psychometrics: Guttman reproducibility 0.96 (a genuine hierarchy of loss), test–retest 0.94, inter-rater r = 0.91.
  • Versus the others: Katz (1963, 6 items, A–G) includes continence and transferring but not grooming and ambulation, while the PSMS has grooming and ambulation; Barthel (1965, 10 items, 0–100) is the most detailed and RCP/BGS-endorsed but has a ceiling effect in ambulant patients.
  • Updates: now rarely used alone — "Lawton–Brody" usually means the IADL scale, paired with Barthel or Katz for ADLs. The PSMS survives in dementia and caregiver research because its 5 levels detect partial dependence. German S3 2024, WHO ICOPE and ASCO's PGA mandate an ADL domain without naming a tool. India: LASI uses Katz-type items (about 3% severe ADL disability, 7.4% any dependency; 13.7% in rural Goa).

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

5.

Physical Self-Maintenance Scale (PSMS) Lawton and Brody Personal Self-Maintenance Scale A. Position in Geriatric Assessment

1.

The PSMS is one of the three named basic-ADL instruments in the CGA framework — Katz Index, Lawton Personal Self-Maintenance Scale, Barthel Index.

2.

Its assigned basic context is: strengths and limitations in self-care, basic mobility and incontinence.

3.

These are the most widely used tools, used to detect whether the patient has problems performing activities people must be able to do to survive in the community without help.

4.

Clinical implication: patients unable to perform basic ADLs will generally require 12- to 24-hour caregiver support — in contrast to IADL loss, which threatens independent living in a house or apartment.

5.

Hierarchy rule: basic ADL scales like the PSMS are appropriate for patients who are already dependent or disabled; in a robust or merely pre-frail person, frailty measures, not basic ADLs, should be used.

B. The Scale Itself

Origin and purpose

Developed at the Philadelphia Geriatric Center by M. Powell Lawton and Elaine M. Brody, 1969, published in The Gerontologist.

Purpose: to gauge disability in older people living in the community or in an institution, for planning and evaluating treatment.

Deliberately designed so that items target observable behaviours, not subjective judgements. Published as a paired instrument: the 6-item PSMS (basic ADLs) together with the 8-item IADL scale. In practice the IADL half became far more famous, but both were introduced in the same 1969 paper. Recommended age group: 60 years and over. Both an observer-rated and a self-rated version exist; the self-rated version was later incorporated into the Philadelphia Geriatric Center Multilevel Assessment Instrument (MAI). The six domains # Item What it assesses 1 Toileting Continence and independent use of toilet or commode 2 Feeding Eating without help, spillage, or need for feeding 3 Dressing Selecting and putting on clothes independently 4 Grooming Face, hair, nails, hands — personal appearance 5 Physical ambulation Walking indoors and outdoors, need for aid or wheelchair, bedbound status 6 Bathing Bathing or showering without assistance Mnemonic: T-F-D-G-A-B — "The Frail Do Get Assisted Bathing."

Response structure and scoring

Each item is graded on a 5-point scale, running from complete independence (level 1) to complete dependence (level 5), with intermediate levels describing progressively more help needed.

For summary scoring, each item is dichotomised: 1 point for the independent level, 0 for the dependent levels. Total score 0–6. 6 equals fully independent; 0 equals totally dependent.

Higher score means better function — the same direction as Katz, the opposite direction to a frailty index.

Psychometrics (original data)

Guttman scale reproducibility coefficient 0.96 for the 6-item PSMS (0.93 for the IADL half) — the items form a genuine hierarchy of loss.

Test–retest reliability 0.94 (0.88 for the IADL half).

Inter-rater validity: two nurses independently rating 36 patients gave a Pearson correlation of 0.91.

C. Comparison with the Other Basic-ADL Scales

Feature PSMS (Lawton–Brody) Katz Index Barthel Index Year 1969 1963 1965 (modified 1988)

Items 6 6 10

Domains Toileting, feeding, dressing, Bathing, dressing, toileting, Feeding, bathing, grooming, dressing, bowels, grooming, ambulation, bathing transferring, continence, feeding bladder, toilet use, transfer, mobility, stairs Grading 5 levels per item, dichotomised Independent/dependent (A–G) 0/5/10 or 0/5/10/15 per item Total 0–6 (6 = independent) 0–6 or A–G 0–100 (or 0–20)

Unique Grooming and ambulation Continence and transferring Stairs, bowels, bladder items Best use Community and institutional older Classic hierarchy of ADL loss Rehabilitation and stroke — most granular adults; paired with IADL scale Weakness Little used alone today; overshadowed Crude two-level grading Ceiling effect in ambulant patients by its own IADL twin Key contrast for the exam: the PSMS includes grooming and ambulation but omits transferring and continence as separate items; the Katz Index includes continence and transferring but omits grooming and ambulation. Barthel is the most detailed and is the RCP/BGS-endorsed scale for ADL measurement, but suffers a ceiling effect in patients who can already walk.

D. Latest Updates (2023–Present)

1.

The PSMS is now rarely used as a standalone instrument. Its IADL half has become the global standard — "the Lawton–Brody scale" in current trial protocols almost always means the IADL scale — while the ADL half has been largely displaced clinically by the Barthel Index and Katz Index. Contemporary trials routinely pair "the Lawton and Brody scale" with the Barthel Index, using Lawton for IADLs and Barthel for ADLs.

2.

Where it survives is dementia and caregiver research. The observer-rated PSMS remains in use for people with dementia and in caregiver-burden studies, because its 5-level gradations detect partial dependence better than a binary scale — relevant to recent dementia home-care trials such as [email protected].

3.

Standardisation pressure from new guidelines. The German S3 CGA guideline (2024) mandates "self-help ability/ADL" as one of six core dimensions but does not prescribe a specific instrument; WHO ICOPE and ASCO's Practical Geriatric Assessment (2023) likewise require an ADL domain without naming the PSMS. The trend is domain-mandated, tool-agnostic assessment.

4.

Indian context. LASI and most Indian epidemiological work use Katz-type or study-specific ADL items rather than the PSMS. Indian ADL disability prevalence is around 3% severe ADL disability and 7.4% any ADL dependency in LASI wave-1, and much higher in rural surveys (about 13.7% in rural Goa).

E. Current Practice Update

Aspect Pathy's 6th ed. (2022) Current position (2023–2026)

Status of Listed as one of three Rarely used alone; its IADL companion scale dominates; ADL measurement has moved to PSMS recommended basic-ADL tools Barthel and Katz Which tool No preference between Katz, Domain is mandated, tool is not (German S3 2024, WHO ICOPE, ASCO PGA) to use Lawton and Barthel Grading Not discussed The 5-level gradation is the PSMS's remaining advantage — better at detecting partial detail dependence in dementia and caregiver research Reporting Not stated Confusion persists because Barthel rises with independence out of 100, PSMS out of 6, direction Katz uses letters — always state the scale and its direction F. Exam One-Liners PSMS = Lawton and Brody, 1969, Philadelphia Geriatric Center — published in the same paper as the far more famous Lawton IADL scale.

Six items: Toileting, Feeding, Dressing, Grooming, Physical ambulation, Bathing. Each item graded on 5 levels; dichotomised to give a total of 0–6.

6 equals fully independent, 0 equals totally dependent — higher is better.

Guttman reproducibility 0.96, test–retest 0.94, inter-rater r = 0.91.

PSMS has grooming and ambulation; Katz has continence and transferring — the classic distinguishing point. Basic ADL loss means 12–24 hour caregiver support; IADL loss means a threat to independent community living.

IADLs are lost first, basic ADLs later — which is why Lawton's IADL half outlived his ADL half in clinical use. Barthel is the RCP/BGS-endorsed ADL scale and has a ceiling effect in ambulant patients.

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