A senior citizen contemplates the multifaceted aspects of their well-being.

ICECAP-O: Is This the Key to Better Care for Seniors?

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Kai Mendoza in Health & Wellness October 2026 • 4 min read.

"New UK research questions how well a popular quality of life measure truly captures the health of older adults."


As the global population ages, ensuring the well-being of older adults becomes increasingly critical. Economic evaluations play a vital role in determining the effectiveness of care services, helping to allocate resources where they'll have the greatest impact. One such evaluation measure is the ICECAP-O (ICEpop CAPability measure for Older people), designed to assess the quality of life and well-being of seniors.

However, questions have arisen regarding the ICECAP-O's ability to fully capture the multifaceted nature of health, particularly physical health, as it doesn't directly ask seniors about their health status. Does it adequately reflect the nuances of older adults' well-being, or are important aspects being overlooked?

A recent study from the UK delves into this very issue, examining how well the ICECAP-O covers the physical, mental, and social functioning of older adults. The findings have important implications for how we evaluate care services and ensure they truly meet the needs of our aging population.

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ICECAP-O in Context

ICECAP-O is a measure of well-being for adults aged 65 years and older. It contains five attributes, each with four response levels. Index values have been estimated from a best-worst scaling study of older people in England. Research has also compared ICECAP-O with the EQ-5D-3L for test-retest reliability, construct validity, and responsiveness.

Measuring Capability

The ICECAP-O is designed to measure capability in older people rather than focusing only on health status. Flynn and colleagues assessed the construct validity of overall ICECAP-O scores and quantified differences in quality of life. A validation study in post-hospitalized older people reported good convergent validity with well-being and health measures and found that the instrument differentiated between groups. However, published work also identifies a lack of comparable capability measures in some research contexts.

Origins of the Measure

ICECAP-O was developed around five attributes of well-being identified as important to older people in the UK. These include Attachment, described as love and friendship, and Security. Its development reflects a capability-oriented view of later-life well-being. Age-Friendly Health Systems provide a related systems perspective emphasizing communication, leadership, and information systems that track care.

Unpacking ICECAP-O: What Does It Really Measure?

A senior citizen contemplates the multifaceted aspects of their well-being.

The UK study, published in Quality of Life Research, used exploratory factor analysis (EFA) to assess the overlap between the ICECAP-O and the EQ-5D-5L, a more traditional health measure. Researchers analyzed data from 516 participants aged 70 and older, exploring how the different measures correlated with physical, mental, and social functioning.

The results revealed a fascinating, and potentially concerning, picture:

  • Limited Overlap: The ICECAP-O and EQ-5D-5L items largely loaded on separate factors, indicating they capture different underlying constructs.
  • Mental and Social Strengths: The ICECAP-O demonstrated strong correlations with mental and social functioning measures, and it could differentiate between individuals with varying scores in these areas.
  • Physical Functioning Gap: The correlation between the ICECAP-O and the Barthel Index, a measure of physical functioning, was only moderate, suggesting the ICECAP-O might not fully capture this crucial aspect of health.
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Current Research Use

ICECAP-O is described as a measure of capability in older people for use in economic evaluation. The M3EWB resource identifies it as the ICEpop CAPability measure for Older people. Its inclusion in reviews by Early Career Researchers in 2023 indicates continuing interest in how capability measures are used and assessed.

Validation Boundaries

Evidence from post-hospitalized older people supports the ICECAP-O as a valid instrument of capability-related well-being in that population. The study reported good convergent validity with related measures. These findings establish support in the studied setting, but they do not by themselves demonstrate identical performance across every older population or care context.

ICECAP-O and EQ-5D

In a falls-related population, the ICECAP-O demonstrated convergent validity with measures of health-related quality of life. The comparison also concluded that nursing-related considerations were relevant to interpreting the measures in that setting. Another account describes ICECAP-O as offering local government an opportunity to evaluate health and other interventions and compare effects across sectors.

These findings suggest that while the ICECAP-O effectively assesses mental and social well-being, it may fall short in comprehensively reflecting the physical health of older adults. This raises concerns about its use as a sole measure in economic evaluations of care services.

The Future of Senior Care Evaluation: A More Holistic Approach

The study's authors recommend that a complementary health measure should be used alongside the ICECAP-O to capture the full spectrum of benefits from care interventions for older people. Relying solely on the ICECAP-O may lead to an incomplete or even skewed understanding of an intervention's true impact.

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A Wider Evaluation Lens

The ICECAP-O is identified as a capability measure recommended by NICE for evaluating social care interventions. Research also found that it correlated highly with mental and social functioning health measures. The same research reported that ICECAP-O could differentiate between individuals with different scores on those measures. Together, these findings support using capability information alongside conventional health measures when assessing social care.

Adapting to an Aging Future

Future senior care will be shaped by early-onset chronic disease, a growing caregiving gap, and climate change. Reported senior-living trends include smart homes, healthcare technology integration, wellness-focused care, and aging in place. Other emerging approaches include early screening programs, nutritional counseling, and mental health support in senior health plans. These developments point toward care that combines prevention, technology, independence, and broader well-being.

Health Beyond the Clinic

The health and well-being of older adults have broader implications for society. The Office of Disease Prevention and Health Promotion reports that people aged 65 years and older made up 17 percent of the population. This demographic context means that healthy aging is connected to population-wide planning, not only individual clinical encounters. Social determinants of health therefore remain an important part of the wider aging discussion.

What Capabilities Mean

Research using experienced utility estimated that the impact of mental health problems was about 10 times larger than the impact of mobility constraints. This finding illustrates why capability-based assessment can capture consequences that may not be represented by mobility alone. A 2022 study was the first to determine the test-retest reliability of ICECAP-O for community-dwelling people with dementia. It addressed a reliability question that had not previously been determined for that population.

This research underscores the importance of adopting a more holistic approach to evaluating care services for seniors. By considering both capability well-being (as measured by ICECAP-O) and direct health measures, we can gain a more accurate and comprehensive understanding of the effectiveness of different interventions.

Ultimately, this will enable better-informed decisions about resource allocation and ensure that care services are truly meeting the diverse needs of our aging population, leading to improved quality of life and well-being for all seniors.

What a cross-sectional comparison can show

Observational study (level 4 of 8)

The findings describe a UK sample of older adults, not necessarily people in every care setting or with every health profile.[1]

What the measure captured in this comparison

The pattern suggests ICECAP-O reflects aspects of health through wellbeing, but its relationship with physical functioning was less clear than with mental and social functioning.[2]

The factor analysis found shared constructs between ICECAP-O and EQ-5D-5L, so the measures were not wholly separate; that does not mean they represent health and wellbeing in identical ways.[2]

Where the evidence is weakest

  • Because the study was cross-sectional, it could not test whether the measure detects changes linked to care services or shifts in perceived health and wellbeing.[2]
  • The authors cautioned that ICECAP-O may not capture every health effect of interventions, particularly physical functioning.[1] [2]
  • Respondents varied considerably, and excluding very short or long completion times did not change the main findings.[2]

An online UK questionnaire and factor analysis

Study designObservational study[1]
PopulationPeople aged 70 and older from the UK[1]
Sample size516[1]
SettingUK; data collected through an online questionnaire[1]
Effect sizeICECAP-O correlated highly with the overall EQ-5D-5L score (0.63); correlation with the Barthel Index was moderate[1]
Times cited22[1]

How this finding fits with other comparisons

Other samples of frail older people and social care users also showed limited overlap in factor structure and moderate links between ICECAP-O and physical functioning.[1]

Comparisons in post-hospitalized older people and people with dementia reported stronger correlations, although the dementia result relied on nursing professionals as proxy respondents, which may have influenced it.[1]

A later paper described the ICECAP-O’s validity evidence as generally favorable while noting the qualification that it may not fully capture physical health.[3]

Another later validation paper called it a promising outcome measure for economic evaluations, while likewise noting possible gaps in physical health coverage.[4]

A later care-home analysis cited recommendations to combine complementary quality-of-life measures that represent different constructs, including health-related and social care-related quality of life.[5]

Questions left open by this study

  • Would the same pattern appear when ICECAP-O is compared with clinical rather than self-reported measures of physical and mental health?[2]
  • How well does ICECAP-O register change when care services affect perceived wellbeing or health?[2]
  • Could adding physical functioning to the measure address the gap without counting some health effects twice when paired with a generic health measure?[1]

Terms used in the study

Barthel Index
A measure of physical functioning.[2]

Sources

  1. Does the ICECAP-O cover the physical, mental and social functioning of older people in the UK? (Springer Science and Business Media LLC, 2018)
  2. Does the ICECAP-O cover the physical, mental and social functioning of older people in the UK? (Europe PMC, 2019)
  3. Happy with Your Capabilities? Valuing ICECAP-O and ICECAP-A States Based on Experienced Utility Using Subjective Well-Being Data (2020)
  4. A validation study of the ICECAP-O in informal carers of people with dementia from eight European Countries (2019)
  5. Construct validity of measures of care home resident quality of life: cross-sectional analysis using data from a pilot minimum data set in England (2025)

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1007/s11136-018-2042-x, Alternate LINK

Title: Does The Icecap-O Cover The Physical, Mental And Social Functioning Of Older People In The Uk?

Subject: Public Health, Environmental and Occupational Health

Journal: Quality of Life Research

Publisher: Springer Science and Business Media LLC

Authors: Mariska Q. N. Hackert, Job Van Exel, Werner B. F. Brouwer

Published: 2018-11-11

Everything You Need To Know

1

What exactly is the ICECAP-O, and what does it aim to measure in older adults?

The ICECAP-O (ICEpop CAPability measure for Older people) is a tool designed to evaluate the quality of life and well-being specifically in older adults. It's used to assess the impact of care services and inform resource allocation by measuring a senior's capabilities across different dimensions, such as attachment, security, role, enjoyment, and control. However, a recent study suggests it might not fully capture physical health aspects, focusing more on mental and social well-being.

2

According to the UK study, what are the main limitations of using the ICECAP-O to assess the health of older adults?

The study revealed that while the ICECAP-O effectively measures mental and social functioning, its correlation with physical health measures, such as the Barthel Index, is only moderate. This suggests that ICECAP-O might not fully reflect the physical capabilities and limitations of older adults. The research also found that ICECAP-O and EQ-5D-5L capture different underlying constructs, emphasizing the potential for a gap in assessing overall health when relying solely on ICECAP-O.

3

What are the potential consequences of relying solely on the ICECAP-O in economic evaluations of care services for seniors?

If the ICECAP-O is the only measure used, economic evaluations of care services for seniors may not accurately reflect the impact of those services on their physical health. This could lead to an incomplete or skewed understanding of an intervention's true impact, potentially resulting in misallocation of resources and a failure to address critical physical health needs. Ignoring physical health factors could undervalue interventions that improve mobility, reduce pain, or enhance physical independence.

4

What solution do the study's authors propose to address the limitations of the ICECAP-O in evaluating senior care?

The researchers suggest combining the ICECAP-O with a complementary health measure to provide a more holistic evaluation of care interventions for older people. By incorporating a measure that specifically assesses physical health, such as the EQ-5D-5L or the Barthel Index, it's possible to gain a more complete understanding of the benefits of care, ensuring that both physical and mental/social well-being are adequately addressed. This combined approach would offer a more balanced and accurate assessment for better decision-making in senior care.

5

How does the ICECAP-O's focus on 'capability' affect its ability to comprehensively assess the health of older adults?

The ICECAP-O focuses on 'capability' – what a person is able to do or be – rather than directly assessing their health status. This approach prioritizes an individual's potential and opportunities for well-being, but this also raises a concern that it might not fully capture the actual physical health conditions experienced by older adults. While capability is vital, the absence of direct health questions could lead to overlooking important health-related challenges and needs. This highlights a need for an approach to include direct measures of health when evaluating care for seniors.

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