title: Calibration and Validation of the Dutch-Flemish PROMIS Pain Interference Item Bank in Patients with Chronic Pain.
abstract: The Dutch-Flemish PROMIS Group translated the adult PROMIS Pain Interference item bank into Dutch-Flemish. The aims of the current study were to calibrate the parameters of these items using an item response theory (IRT) model, to evaluate the cross-cultural validity of the Dutch-Flemish translations compared to the original English items, and to evaluate their reliability and construct validity. The 40 items in the bank were completed by 1085 Dutch chronic pain patients. Before calibrating the items, IRT model assumptions were evaluated using confirmatory factor analysis (CFA). Items were calibrated using the graded response model (GRM), an IRT model appropriate for items with more than two response options. To evaluate cross-cultural validity, differential item functioning (DIF) for language (Dutch vs. English) was examined. Reliability was evaluated based on standard errors and Cronbach's alpha. To evaluate construct validity correlations with scores on legacy instruments (e.g., the Disabilities of the Arm, Shoulder and Hand Questionnaire) were calculated. Unidimensionality of the Dutch-Flemish PROMIS Pain Interference item bank was supported by CFA tests of model fit (CFI = 0.986, TLI = 0.986). Furthermore, the data fit the GRM and showed good coverage across the pain interference continuum (threshold-parameters range: -3.04 to 3.44). The Dutch-Flemish PROMIS Pain Interference item bank has good cross-cultural validity (only two out of 40 items showing DIF), good reliability (Cronbach's alpha = 0.98), and good construct validity (Pearson correlations between 0.62 and 0.75). A computer adaptive test (CAT) and Dutch-Flemish PROMIS short forms of the Dutch-Flemish PROMIS Pain Interference item bank can now be developed.
authors.affiliation: Amsterdam Rehabilitation Research Center | Reade, Amsterdam, The Netherlands.
authors.forename: Martine H P
authors.initials: MH
authors.lastname: Crins
authors.affiliation: Amsterdam Rehabilitation Research Center | Reade, Amsterdam, The Netherlands.
authors.forename: Leo D
authors.initials: LD
authors.lastname: Roorda
authors.affiliation: Department of Clinical Psychology, The EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands; Department of Methodology, The EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Niels
authors.initials: N
authors.lastname: Smits
authors.affiliation: Department of Epidemiology and Biostatistics, The EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Henrica C W
authors.initials: HC
authors.lastname: de Vet
authors.affiliation: Department of Development and Regeneration, Skeletal Biology and Engineering Research Center, KU Leuven, Louvain, Belgium; Rheumatology, University Hospitals, KU Leuven, Louvain, Belgium.
authors.forename: Rene
authors.initials: R
authors.lastname: Westhovens
authors.affiliation: Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America.
authors.forename: David
authors.initials: D
authors.lastname: Cella
authors.affiliation: Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America.
authors.forename: Karon F
authors.initials: KF
authors.lastname: Cook
authors.affiliation: Outcomes Research, Evidera, Bethesda, Maryland, United States of America.
authors.forename: Dennis
authors.initials: D
authors.lastname: Revicki
authors.affiliation: Leones Group BV, Amsterdam, The Netherlands.
authors.forename: Jaap
authors.initials: J
authors.lastname: van Leeuwen
authors.affiliation: Department of Epidemiology and Biostatistics, The EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands; Department of Rheumatology, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Maarten
authors.initials: M
authors.lastname: Boers
authors.affiliation: Department of Rehabilitation Medicine, VU University Medical Center, Amsterdam, The Netherlands; Department of Psychiatry, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Joost
authors.initials: J
authors.lastname: Dekker
authors.affiliation: Department of Epidemiology and Biostatistics, The EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands.
authors.forename: Caroline B
authors.initials: CB
authors.lastname: Terwee
mesh_terms: D000328:Adult; D001530:Belgium; D002138:Calibration; D059350:Chronic Pain / Q000453:epidemiology / Q000503:physiopathology / Q000628:therapy; D016208:Databases, Factual / Q000592:standards*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009426:Netherlands; D059408:Pain Management