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Psychometric Properties of the Foot and Ankle Outcome Score in a Community-Based Study of Adults With and Without Osteoarthritis

Golightly, Yvonne M.; DeVellis, Robert F.; Nelson, Amanda E.; Hannan, Marian T.; Lohmander, Stefan LU ; Renner, Jordan B. and Jordan, Joanne M. (2014) In Arthritis Care and Research1988-01-01+01:002000-01-01+01:00 66(3). p.395-403
Abstract
ObjectiveFoot and ankle problems are common in adults, and large observational studies are needed to advance our understanding of the etiology and impact of these conditions. Valid and reliable measures of foot and ankle symptoms and physical function are necessary for this research. This study examined psychometric properties of the Foot and Ankle Outcome Score (FAOS) subscales (pain, other symptoms, activities of daily living [ADL], sport and recreational function [sport/recreation], and foot- and ankle-related quality of life [QOL]) in a large, community-based sample of African American and white men and women ages 50 years. MethodsJohnston County Osteoarthritis Project participants (n = 1,670) completed the 42-item FAOS (mean age 69... (More)
ObjectiveFoot and ankle problems are common in adults, and large observational studies are needed to advance our understanding of the etiology and impact of these conditions. Valid and reliable measures of foot and ankle symptoms and physical function are necessary for this research. This study examined psychometric properties of the Foot and Ankle Outcome Score (FAOS) subscales (pain, other symptoms, activities of daily living [ADL], sport and recreational function [sport/recreation], and foot- and ankle-related quality of life [QOL]) in a large, community-based sample of African American and white men and women ages 50 years. MethodsJohnston County Osteoarthritis Project participants (n = 1,670) completed the 42-item FAOS (mean age 69 years, 68% women, 31% African American, mean body mass index [BMI] 31.5 kg/m(2)). Internal consistency, test-retest reliability, convergent validity, and structural validity of each subscale were examined for the sample and for subgroups according to race, sex, age, BMI, presence of knee or hip osteoarthritis, and presence of knee, hip, or low back symptoms. ResultsFor the sample and each subgroup, Cronbach's alpha coefficients ranged from 0.95-0.97 (pain), 0.97-0.98 (ADL), 0.94-0.96 (sport/recreation), 0.89-0.92 (QOL), and 0.72-0.82 (symptoms). Correlation coefficients ranged from 0.24-0.52 for pain and symptoms subscales with foot and ankle symptoms and from 0.30-0.55 for ADL and sport/recreation subscales with the Western Ontario and McMaster Universities Osteoarthritis Index function subscale. Intraclass correlation coefficients for test-retest reliability ranged from 0.63-0.81. Items loaded on a single factor for each subscale except symptoms (2 factors). ConclusionThe FAOS exhibited sufficient reliability and validity in this large cohort study. (Less)
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Contribution to journal
publication status
published
subject
in
Arthritis Care and Research1988-01-01+01:002000-01-01+01:00
volume
66
issue
3
pages
395 - 403
publisher
John Wiley & Sons
external identifiers
  • wos:000331684800008
  • scopus:84896830706
ISSN
2151-4658
DOI
10.1002/acr.22162
language
English
LU publication?
yes
id
4139865f-3f14-4291-8d4b-4c9facdd3e28 (old id 4417606)
date added to LUP
2014-05-05 07:20:45
date last changed
2017-09-17 03:34:26
@article{4139865f-3f14-4291-8d4b-4c9facdd3e28,
  abstract     = {ObjectiveFoot and ankle problems are common in adults, and large observational studies are needed to advance our understanding of the etiology and impact of these conditions. Valid and reliable measures of foot and ankle symptoms and physical function are necessary for this research. This study examined psychometric properties of the Foot and Ankle Outcome Score (FAOS) subscales (pain, other symptoms, activities of daily living [ADL], sport and recreational function [sport/recreation], and foot- and ankle-related quality of life [QOL]) in a large, community-based sample of African American and white men and women ages 50 years. MethodsJohnston County Osteoarthritis Project participants (n = 1,670) completed the 42-item FAOS (mean age 69 years, 68% women, 31% African American, mean body mass index [BMI] 31.5 kg/m(2)). Internal consistency, test-retest reliability, convergent validity, and structural validity of each subscale were examined for the sample and for subgroups according to race, sex, age, BMI, presence of knee or hip osteoarthritis, and presence of knee, hip, or low back symptoms. ResultsFor the sample and each subgroup, Cronbach's alpha coefficients ranged from 0.95-0.97 (pain), 0.97-0.98 (ADL), 0.94-0.96 (sport/recreation), 0.89-0.92 (QOL), and 0.72-0.82 (symptoms). Correlation coefficients ranged from 0.24-0.52 for pain and symptoms subscales with foot and ankle symptoms and from 0.30-0.55 for ADL and sport/recreation subscales with the Western Ontario and McMaster Universities Osteoarthritis Index function subscale. Intraclass correlation coefficients for test-retest reliability ranged from 0.63-0.81. Items loaded on a single factor for each subscale except symptoms (2 factors). ConclusionThe FAOS exhibited sufficient reliability and validity in this large cohort study.},
  author       = {Golightly, Yvonne M. and DeVellis, Robert F. and Nelson, Amanda E. and Hannan, Marian T. and Lohmander, Stefan and Renner, Jordan B. and Jordan, Joanne M.},
  issn         = {2151-4658},
  language     = {eng},
  number       = {3},
  pages        = {395--403},
  publisher    = {John Wiley & Sons},
  series       = {Arthritis Care and Research1988-01-01+01:002000-01-01+01:00},
  title        = {Psychometric Properties of the Foot and Ankle Outcome Score in a Community-Based Study of Adults With and Without Osteoarthritis},
  url          = {http://dx.doi.org/10.1002/acr.22162},
  volume       = {66},
  year         = {2014},
}