title: Cross-cultural validation of the ICOAP and physical function short forms of the HOOS and KOOS in a multi-country study of patients with hip and knee osteoarthritis.
abstract: To evaluate the internal consistency and construct validity of the Physical Function short-forms for the Hip and Knee Injury Osteoarthritis Outcome Scores (HOOS-PS/KOOS-PS) and the Intermittent and Constant Osteoarthritis Pain (ICOAP) in a nine country study of patients consulting for total hip or knee replacement (THR or TKR).
  
  
  
  Patients completed HOOS-PS or KOOS-PS, ICOAP and Western Ontario and McMaster Universities' Osteoarthritis Index (WOMAC) pain and physical function subscales at their consultation visit. Internal consistency was calculated using Cronbach's alpha. The association of HOOS-PS/KOOS-PS and ICOAP with WOMAC pain and function subscales was calculated with Spearman correlation coefficients with 95% confidence intervals.
  
  
  
  HOOS-PS/KOOS-PS and ICOAP demonstrated high internal consistency across countries (alpha 0.75-0.96 (hip) and 0.76-0.95 (knee)). Both HOOS-PS and KOOS-PS demonstrated high correlations (0.76-0.90 and 0.75-0.91, respectively) with WOMAC function in all countries. ICOAP exhibited moderate to high correlations with WOMAC pain and function subscales (0.53-0.84 (hip) and 0.43-0.84 (knee)).
  
  
  
  The psychometric properties of the HOOS-PS/KOOS-PS, and ICOAP were maintained across all countries.
authors: Division of Health Care and Outcomes Research, Kremble Research Institute, Toronto, Ontario, Canada; School of Physical Therapy and Dept. of Orthopedics, Marshall University, Huntington, WV, USA.
authors: S P
authors: SP
authors: Mehta
authors: Division of Health Care and Outcomes Research and Arthritis Community Research and Evaluation Unit, Kremble Research Institute, Toronto, Ontario, Canada.
authors: A
authors: A
authors: Sankar
authors: Division of Health Care and Outcomes Research and Arthritis Community Research and Evaluation Unit, Kremble Research Institute, Toronto, Ontario, Canada.
authors: V
authors: V
authors: Venkataramanan
authors: Department of Orthopaedics, Clinical Sciences Lund, Lund University, Lund, Sweden; Institute of Sports and Clinical Biomechanics, University of Southern Denmark, Denmark.
authors: L S
authors: LS
authors: Lohmander
authors: Division of Rheumatology, Department of Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Orthopedic Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA.
authors: J N
authors: JN
authors: Katz
authors: Division of Rheumatology, Department of Medicine, Women's College Research Institute, Women's College Hospital, University of Toronto, Toronto, Ontario, Canada; Department of Health Policy, Management and Evaluation, University of Toronto, Canada; Adjunct Scientist, Institute of Clinical Evaluative Sciences, Faculty of Medicine, University of Toronto, Canada.
authors: G A
authors: GA
authors: Hawker
authors: UPMC Univ Paris 06, GRC-UPMC 08 (EEMOIS), France; AP-HP, Pitié Salpêtrière Hospital, Department of Rheumatology, Paris, France.
authors: L
authors: L
authors: Gossec
authors: Institute of Sports and Clinical Biomechanics, University of Southern Denmark, Denmark.
authors: E M
authors: EM
authors: Roos
authors: Department of Rheumatology, Dijon University Hospital and INSERM U1093, UFR Medecine, University of Burgondy, France.
authors: J-F
authors: JF
authors: Maillefert
authors: Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands; Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands.
authors: M
authors: M
authors: Kloppenburg
authors: Paris Descartes University, Department of Rheumatology-Hôpital Cochin - Assistance Publique - Hôpitaux de Paris, INSERM (U1153): Clinical Epidemiology and Biostatistics, PRES Sorbonne Paris-Cité, France.
authors: M
authors: M
authors: Dougados
authors: Division of Health Care and Outcomes Research, Kremble Research Institute, Toronto, Ontario, Canada; Department of Health Policy, Management and Evaluation, University of Toronto, Canada; Department of Rehabilitation Science, University of Toronto, Canada. Electronic address: adavis@uhnresearch.ca.
authors: A M
authors: AM
authors: Davis
mesh_terms: D003431:Cross-Cultural Comparison; D004185:Disability Evaluation; D006801:Humans; D015207:Osteoarthritis, Hip; D020370:Osteoarthritis, Knee; D010147:Pain Measurement; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires
keywords: Cross-cultural validation; HOOS-PS; Hip or knee osteoarthritis; ICOAP; KOOS-PS