Cited by 99Adrenal Hormones and DisordersPsychometric Methodologies and TestingHealth Education and Validation

Quality of Life in European Patients with Addison's Disease: Validity of the Disease-Specific Questionnaire AddiQoL

Open access
Øksnes, Marianne, Bensing, Sophie, Hulting, Anna-Lena, Kämpe, Olle, Hackemann, Annika, Meyer, Gesine, Badenhoop, Klaus, Betterle, Corrado +9 more·2012·The Journal of Clinical Endocrinology & Metabolism

Abstract

CONTEXT: Patients with Addison's disease (AD) self-report impairment in specific dimensions on well-being questionnaires. An AD-specific quality-of-life questionnaire (AddiQoL) was developed to aid evaluation of patients. OBJECTIVE: We aimed to translate and determine construct validity, reliability, and concurrent validity of the AddiQoL questionnaire. METHODS: After translation, the final versions were tested in AD patients from Norway (n = 107), Sweden (n = 101), Italy (n = 165), Germany (n = 200), and Poland (n = 50). Construct validity was examined by exploratory factor analysis and Rasch analysis, aiming at unidimensionality and fit to the Rasch model. Reliability was determined by Cronbach's coefficient-α and Person separation index. Longitudinal reliability was tested by differential item functioning in stable patient subgroups. Concurrent validity was examined in Norwegian (n = 101) and Swedish (n = 107) patients. RESULTS: Exploratory factor analysis and Rasch analysis identified six items with poor psychometric properties. The 30 remaining items fitted the Rasch model and proved unidimensional, supported by appropriate item and person fit residuals and a nonsignificant χ(2) probability. Crohnbach's α-coefficient 0.93 and Person separation index 0.86 indicate high reliability. Longitudinal reliability was excellent. Correlation with Short Form-36 and Psychological General Well-Being Index scores was high. A shorter subscale comprising eight items also proved valid and reliable. Testing of AddiQoL-30 in this large patient cohort showed significantly worse scores with increasing age and in women compared with men but no difference between patients with isolated AD and those with concomitant diseases. CONCLUSION: The validation process resulted in a revised 30-item AddiQoL questionnaire and an eight-item AddiQoL short version with good psychometric properties and high reliability.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1210/jc.2011-1901

Cites

37 of 37 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The Addison's disease-specific quality of life questionnaire (AddiQoL) was established by the European consortium EURADRENAL to assess health-related QoL in patients with PAI.

    “The Addison’s disease-specific quality of life questionnaire (AddiQoL) was established by the European consortium EURADRENAL to assess health-related QoL in patients with PAI.70”

    From Adrenal crisis: prevention and management in adult patients (2019) · cites this paper as [70]

    The Questionnaires section describes AddiQoL as a disease-specific measure of health-related quality of life in Addison’s disease, and the Discussion reports that this study validated a revised 30-item version. The Funding section identifies Euradrenal as a supporter of this work, but the paper says the original questionnaire had already been developed; it does not establish that EURADRENAL created it. Page numbers are unavailable in our copy. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Øksnes, M., Bensing, S., Hulting, A.-L., Kämpe, O., Hackemann, A., Meyer, G., Badenhoop, K., Betterle, C., Parolo, A., Giordano, R., Falorni, A., Papierska, L., Jeske, W., Kasperlik-Zaluska, A. A., Chatterjee, V. K. K., Husebye, E. S., & Løvås, K.
Affiliations
  • Haukeland University Hospital (NO)
  • Uppsala University (SE)
  • Karolinska Institutet (SE)
  • Goethe University Frankfurt (DE)
  • University of Padua (IT)
  • University of Turin (IT)
  • University of Perugia (IT)
Corresponding author
Øksnes, Marianne
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2012-02
Volume
97
Issue
2
Pages
568-576
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W1969116334
Cited by
99
References
37
Citations by year
2026: 9 · 2025: 5 · 2024: 4 · 2023: 9 · 2022: 7 · 2021: 13 · 2020: 7 · 2019: 6 · 2018: 6 · 2017: 5 · 2016: 7 · 2015: 5 · 2014: 10 · 2013: 2 · 2012: 3
FWCI
3.94
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Research Information System University of Turin (University of Turin) (submittedVersion, other-oa)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
  • National Institute for Health and Care Research (NF-SI-0508-10198)
  • European Commission (201167)
  • Santen
  • Svenska Läkaresällskapet
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Social Sciences › Decision Sciences › Management Science and Operations Research › Psychometric Methodologies and Testing
  • Social Sciences › Education › Health Education and Validation
Keywords
Addison's disease, quality of life, disease-specific questionnaire, questionnaire validation, psychometric properties, construct validity, reliability statistics, concurrent validity, Rasch analysis, factor analysis, differential item functioning, patient-reported outcomes, short-form questionnaire, sex differences, age differences
MeSH terms
Addison Disease, Adolescent, Adult, Aged, Europe, Female, Germany, Humans, Italy, Male, Middle Aged, Norway, Poland, Quality of Life, Surveys and Questionnaires, Sweden, Reproducibility of Results, Young Adult

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review