title: Measurement Properties of the NIH-Minimal Dataset Dutch Language Version in Patients With Chronic Low Back Pain.
abstract: METHODS
  Validation study with cross-sectional and longitudinal measurements.
  
  
  OBJECTIVE
  To translate the US National Institutes of Health (NIH)-minimal dataset for clinical research on chronic low back pain into the Dutch language and to test its validity and reliability among people with chronic low back pain.
  
  
  BACKGROUND
  The NIH developed a minimal dataset to encourage more complete and consistent reporting of clinical research and to be able to compare studies across countries in patients with low back pain. In the Netherlands, the NIH-minimal dataset has not been translated before and measurement properties are unknown.
  
  
  METHODS
  Cross-cultural validity was tested by a formal forward-backward translation. Structural validity was tested with exploratory factor analyses (comparative fit index, Tucker-Lewis index, and root mean square error of approximation). Hypothesis testing was performed to compare subscales of the NIH dataset with the Pain Disability Index and the EurQol-5D (Pearson correlation coefficients). Internal consistency was tested with Cronbach α and test-retest reliability at 2 weeks was calculated in a subsample of patients with Intraclass Correlation Coefficients and weighted Kappa (κω).
  
  
  RESULTS
  In total, 452 patients were included of which 52 were included for the test-retest study.
  
  
  RESULTS
  factor analysis for structural validity pointed into the direction of a seven-factor model (Cronbach α = 0.78). Factors and total score of the NIH-minimal dataset showed fair to good correlations with Pain Disability Index (r = 0.43-0.70) and EuroQol-5D (r = -0.41 to -0.64). Reliability: test-retest reliability per item showed substantial agreement (κω=0.65). Test-retest reliability per factor was moderate to good (Intraclass Correlation Coefficient = 0.71).
  
  
  CONCLUSIONS
  The Dutch language version measurement properties of the NIH-minimal were satisfactory.
  
  
  METHODS
  N/A.
authors.affiliation: Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Annemarie
authors.initials: A
authors.lastname: Boer
authors.affiliation: Department of Rehabilitation, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Alisa L
authors.initials: AL
authors.lastname: Dutmer
authors.affiliation: Department of Rehabilitation, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Henrica R
authors.initials: HR
authors.lastname: Schiphorst Preuper
authors.affiliation: Center for Human Movement Sciences, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.|Department of Rehabilitation, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Lucas H V
authors.initials: LHV
authors.lastname: van der Woude
authors.affiliation: Department of Public Health, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Roy E
authors.initials: RE
authors.lastname: Stewart
authors.affiliation: Department of Family Medicine and Department of Internal Medicine, Oregon Health & Science University, Portland, OR.|Oregon Institute for Occupational Health Sciences, Oregon Health & Science University, Portland, OR.
authors.forename: Richard A
authors.initials: RA
authors.lastname: Deyo
authors.affiliation: Department of Rehabilitation, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
authors.forename: Michiel F
authors.initials: MF
authors.lastname: Reneman
authors.affiliation: Groningen Spine Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.|Expertise Center of Health and Movement, Saxion University of Applied Sciences, Enschede, The Netherlands.
authors.forename: Remko
authors.initials: R
authors.lastname: Soer
mesh_terms: D000328:Adult; D000368:Aged; D059350:Chronic Pain / Q000175:diagnosis* / Q000453:epidemiology; D003431:Cross-Cultural Comparison; D003430:Cross-Sectional Studies; D016208:Databases, Factual / Q000592:standards; D004185:Disability Evaluation; D006233:Persons with Disabilities; D005260:Female; D006801:Humans; D007802:Language; D008137:Longitudinal Studies; D017116:Low Back Pain / Q000175:diagnosis* / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009316:National Institutes of Health (U.S.) / Q000592:standards*; D009426:Netherlands / Q000453:epidemiology; D010147:Pain Measurement / Q000379:methods / Q000592:standards*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D014177:Translations; D014481:United States / Q000453:epidemiology