Evidence map›Paper›PMID 25389963›Full record

ArticleThe journal of nutrition, health & aging2014

Validity and reliability of the Katz-15 scale to measure unfavorable health outcomes in community-dwelling older people.

W Laan, N P A Zuithoff, I Drubbel, N Bleijenberg, M E Numans, N J de Wit, M J Schuurmans

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Article in The journal of nutrition, health & aging, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed, 3 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

56 citing papers in PubMed, 3 syntheses or guidelines pooled it.

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  11. The Partners in Health scale for older adults: design and examination of its psychometric properties in a Dutch population of older adults.Health expectations : an international journal of public participation in health care and health policy · 2017
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

W LaanWijnand Laan, Assistant Professor, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Str. 6.131, P.O. Box 85500, 3508 GA Utrecht, The Netherlands.
N P A Zuithoff
I Drubbel
N Bleijenberg
M E Numans
N J de Wit
M J Schuurmans

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesTo predict the risk of future unfavourable health outcomes in older people it is common to assess the level of both basic and instrumental activities of daily living. To accomplish this, the commonly used Katz-6 and the Lawton IADL questionnaires can be combined to form the 'Modified Katz ADL' scale, also known as the Katz-15 scale. So far, the validity and reliability of the Katz-15 scale is unknown. The objective of the current study is to investigate how well the Katz-15 is able to predict future unfavorable health outcomes and how this is related to the existing Katz-6 scale.

designWe performed a follow-up study using data from a group of 60 year and older participants from a large Dutch clinical trial.

participantsWe included 2321 participants in the analysis. The average age of the study population was 74 years and 44% was male. MEASUREMENTS: We studied the relation between the Katz-15 scale and a number of unfavourable health outcomes, such as hospitalization, admission to a nursing home, admission to a home for the aged and death within one year of follow-up.

resultsWe found the Katz-15 to be both internally consistent and strongly associated with quality of life measures. We observed moderate to strong associations between the Katz-15 and the unfavourable health outcomes All associations studied were stronger for the Katz-15 scale as compared to the Katz-6 scale.

conclusionThe results of our study indicate that the Katz-15 scale is able to reliably and validly predict future unfavorable health outcomes. This makes the scale a valuable measure in determining both basic and instrumental activities of daily living.

Indexed as

Activities of Daily LivingResidence CharacteristicsAgedClinical Trials as TopicFemaleFollow-Up StudiesGeriatric AssessmentHomes for the AgedHospitalizationHumansMaleMortalityNetherlandsNursing HomesQuality of LifeReproducibility of Results

Identifiers

PMID25389963
PMCPMC12878471

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.