The validity of self-reported body mass index in a population-based osteoarthritis study
(2014) In BMC Musculoskeletal Disorders 15(1). p.1-5- Abstract
Background: Obesity is a well-known risk factor for osteoarthritis (OA). The majority of obesity research in OA is performed using self-reported BMI-data, however, its validity in persons with OA is unknown. The aim of this study was to compare the validity of self-reported body mass index (BMI) in persons with and without clinical osteoarthritis (OA) in a population-based survey. Methods: Height and weight were self-reported, and thereafter measured in 600 persons with and without clinical OA according to the American College of Rheumatology-criteria (knees, hips and/or hands). We compared the differences between measured and self-reported heights, weights and BMIs (kg/m2) for the two groups and explored whether... (More)
Background: Obesity is a well-known risk factor for osteoarthritis (OA). The majority of obesity research in OA is performed using self-reported BMI-data, however, its validity in persons with OA is unknown. The aim of this study was to compare the validity of self-reported body mass index (BMI) in persons with and without clinical osteoarthritis (OA) in a population-based survey. Methods: Height and weight were self-reported, and thereafter measured in 600 persons with and without clinical OA according to the American College of Rheumatology-criteria (knees, hips and/or hands). We compared the differences between measured and self-reported heights, weights and BMIs (kg/m2) for the two groups and explored whether demographic/clinical factors were associated with inaccurate reporting in the OA patients using multivariate linear regression analyses. Results: Mean (SD) age was 64 (8.7) years and 412 (69%) were women. Participants with clinical OA (n = 449) underreported their BMI to a greater extent than participants without clinical OA (n = 151) [mean (SD) difference 1.34 (1.68) kg/m2 and 0.78 (1.40) kg/m2 (p = 0.000), respectively]. There was a strong dose-dependent association between higher measured BMI and greater underreporting of BMI in multivariate analyses (BMI 25-29.99 kg/m2: B = 0.40, 95% CI, 0.06, 0.77), BMI ≥ 30 kg/m2: B = 1.30, 95% CI, 0.86, 1.75) in the clinical OA patients. A higher age as well as the time interval from self-reported to measured BMI-data were associated with inaccurate reporting. Conclusions: Researchers using self-reported height and weight data should be aware of limited agreement with actual height and weight in overweight and obese individuals with clinical OA.
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- author
- Magnusson, Karin LU ; Haugen, Ida K. ; Østerås, Nina ; Nordsletten, Lars ; Natvig, Bård and Hagen, Kåre Birger
- publishing date
- 2014-01-01
- type
- Contribution to journal
- publication status
- published
- keywords
- Age, Body mass index, Obesity, Osteoarthritis, Self-report, Validity
- in
- BMC Musculoskeletal Disorders
- volume
- 15
- issue
- 1
- article number
- 442
- pages
- 1 - 5
- publisher
- BioMed Central (BMC)
- external identifiers
-
- scopus:84924280283
- pmid:25519511
- ISSN
- 1471-2474
- DOI
- 10.1186/1471-2474-15-442
- language
- English
- LU publication?
- no
- id
- 61fbd634-1d10-4060-bc4b-c7904e828ab2
- date added to LUP
- 2018-11-29 15:17:52
- date last changed
- 2024-07-09 01:10:11
@article{61fbd634-1d10-4060-bc4b-c7904e828ab2, abstract = {{<p>Background: Obesity is a well-known risk factor for osteoarthritis (OA). The majority of obesity research in OA is performed using self-reported BMI-data, however, its validity in persons with OA is unknown. The aim of this study was to compare the validity of self-reported body mass index (BMI) in persons with and without clinical osteoarthritis (OA) in a population-based survey. Methods: Height and weight were self-reported, and thereafter measured in 600 persons with and without clinical OA according to the American College of Rheumatology-criteria (knees, hips and/or hands). We compared the differences between measured and self-reported heights, weights and BMIs (kg/m<sup>2</sup>) for the two groups and explored whether demographic/clinical factors were associated with inaccurate reporting in the OA patients using multivariate linear regression analyses. Results: Mean (SD) age was 64 (8.7) years and 412 (69%) were women. Participants with clinical OA (n = 449) underreported their BMI to a greater extent than participants without clinical OA (n = 151) [mean (SD) difference 1.34 (1.68) kg/m<sup>2</sup> and 0.78 (1.40) kg/m<sup>2</sup> (p = 0.000), respectively]. There was a strong dose-dependent association between higher measured BMI and greater underreporting of BMI in multivariate analyses (BMI 25-29.99 kg/m<sup>2</sup>: B = 0.40, 95% CI, 0.06, 0.77), BMI ≥ 30 kg/m<sup>2</sup>: B = 1.30, 95% CI, 0.86, 1.75) in the clinical OA patients. A higher age as well as the time interval from self-reported to measured BMI-data were associated with inaccurate reporting. Conclusions: Researchers using self-reported height and weight data should be aware of limited agreement with actual height and weight in overweight and obese individuals with clinical OA.</p>}}, author = {{Magnusson, Karin and Haugen, Ida K. and Østerås, Nina and Nordsletten, Lars and Natvig, Bård and Hagen, Kåre Birger}}, issn = {{1471-2474}}, keywords = {{Age; Body mass index; Obesity; Osteoarthritis; Self-report; Validity}}, language = {{eng}}, month = {{01}}, number = {{1}}, pages = {{1--5}}, publisher = {{BioMed Central (BMC)}}, series = {{BMC Musculoskeletal Disorders}}, title = {{The validity of self-reported body mass index in a population-based osteoarthritis study}}, url = {{http://dx.doi.org/10.1186/1471-2474-15-442}}, doi = {{10.1186/1471-2474-15-442}}, volume = {{15}}, year = {{2014}}, }