Evidence map›Paper›PMID 16542446›Full record

ArticleHealth and quality of life outcomes2006

Misinterpretation with norm-based scoring of health status in adults with type 1 diabetes.

Alison L Supina, David H Feeny, Linda J Carroll, Jeffrey A Johnson

Abstract read
In one paragraph

Article in Health and quality of life outcomes, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. A meta-analysis of health state valuations for people with diabetes: explaining the variation across methods and implications for economic evaluation.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2011
    Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. The predictive validity of health-related quality of life measures: mortality in a longitudinal population-based study.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2007
    Article
  7. How can quality of life researchers make their work more useful to health workers and their patients?Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2007
    Review
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

4 authors.

Alison L SupinaDepartment of Public Health Sciences, Faculty of Medicine, University of Alberta, Edmonton, AB, Canada. alsupina@ucalgary.ca
David H Feeny
Linda J Carroll
Jeffrey A Johnson

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInterpretations of profile and preference based measure scores can differ. Profile measures often use a norm-based scoring algorithm where each scale is scored to have a standardized mean and standard deviation, relative to the general population scores/norms (i.e., norm-based). Preference-based index measures generate an overall scores on the conventional scale in which 0.00 is assigned to dead and 1.00 is assigned to perfect health. Our objective was to investigate the interpretation of norm-based scoring of generic health status measures in a population of adults with type 1 diabetes by comparing norm-based health status scores and preference-based health-related quality of life (HRQL) scores.

methodsData were collected through self-complete questionnaires sent to patients with type 1 diabetes. The RAND-36 and the Health Utilities Index Mark 3 (HUI3) were included.

resultsA total of 216 (61%) questionnaires were returned. The respondent sample was predominantly female (58.8%); had a mean (SD) age of 37.1 (14.3) years and a mean duration of diabetes of 20.9 (12.4) years. Mean (SD) health status scores were: RAND-36 PHC 47.9 (9.4), RAND-36 MHC 47.2 (11.8), and HUI3 0.78 (0.23). Histograms of these scores show substantial left skew. HUI3 scores were similar to those previously reported for diabetes in the general Canadian population. Physical and mental health summary scores of the RAND-36 suggest that this population is as healthy as the general adult population.

conclusionIn this sample, a preference-based measure indicated poorer health, consistent with clinical evidence, whereas a norm-based measure indicated health similar to the average for the general population. Norm-based scoring measure may provide misleading interpretations in populations when health status is not normally distributed.

Indexed as

Attitude to HealthHealth Status IndicatorsAdultAlbertaAlgorithmsData Interpretation, StatisticalDiabetes Mellitus, Type 1FemaleHumansMalePsychometricsQuality of LifeReference ValuesSickness Impact Profile

Identifiers

PMID16542446
PMCPMC1421385

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LicenceCC BY
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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.