Nonparametric IRT analysis of Quality-of-Life Scales and its application to the World Health Organization Quality-of-Life Scale (WHOQOL-Bref)

by Sijtsma, Klaas, Emons, Wilco H. M., Bouwmeester, Samantha, Nyklíček, Ivan, Roorda, Leo D.
Published 2008

Predictors of outcome of multidisciplinary treatment in chronic widespread pain: an observational study

by de Rooij, Aleid, van der Leeden, Marike, Roorda, Leo D, Steultjens, Martijn PM, Dekker, Joost
Published 2013

Factors predicting the outcome of customised foot orthoses in patients with rheumatoid arthritis: a prospective cohort study

by van der Leeden, Marike, Fiedler, Karin, Jonkman, Annelies, Dahmen, Rutger, Roorda, Leo D, van Schaardenburg, Dirkjan, Dekker, Joost
Published 2011

Overlap of cognitive concepts in chronic widespread pain: An exploratory study

by de Rooij, Aleid, Steultjens, Martijn PM, Siemonsma, Petra C, Vollebregt, Joke A, Roorda, Leo D, Beuving, Willemine, Dekker, Joost
Published 2011

The association of body-mass index and depressed mood with knee pain and activity limitations in knee osteoarthritis: results from the Amsterdam osteoarthritis cohort

by Holla, Jasmijn FM, van der Leeden, Marike, Knol, Dirk L, Roorda, Leo D, van der Esch, Martin, Voorneman, Ramon E, Lems, Willem F, Dekker, Joost
Published 2013

Development of comorbidity-adapted exercise protocols for patients with knee osteoarthritis

by de Rooij, Mariëtte, van der Leeden, Marike, Avezaat, Ellis, Häkkinen, Arja, Klaver, Rob, Maas, Tjieu, Peter, Wilfred F, Roorda, Leo D, Lems, Willem F, Dekker, Joost
Published 2014

Elevated C-reactive protein is associated with lower increase in knee muscle strength in patients with knee osteoarthritis: a 2-year follow-up study in the Amsterdam Osteoarthritis...

by Sanchez-Ramirez, Diana C, van der Leeden, Marike, van der Esch, Martin, Roorda, Leo D, Verschueren, Sabine, van Dieën, Jaap H, Dekker, Joost, Lems, Willem F
Published 2014

Biomechanical factors and physical examination findings in osteoarthritis of the knee: associations with tissue abnormalities assessed by conventional radiography and high-resoluti...

by Knoop, Jesper, Dekker, Joost, Klein, Jan-Paul, van der Leeden, Marike, van der Esch, Martin, Reiding, Dick, Voorneman, Ramon E, Gerritsen, Martijn, Roorda, Leo D, Steultjens, Martijn PM, Lems, Willem F
Published 2012

Calibration and Validation of the Dutch-Flemish PROMIS Pain Interference Item Bank in Patients with Chronic Pain

by Crins, Martine H. P., Roorda, Leo D., Smits, Niels, de Vet, Henrica C. W., Westhovens, Rene, Cella, David, Cook, Karon F., Revicki, Dennis, van Leeuwen, Jaap, Boers, Maarten, Dekker, Joost, Terwee, Caroline B.
Published 2015

Dutch–Flemish translation of nine pediatric item banks from the Patient-Reported Outcomes Measurement Information System (PROMIS)®

by Haverman, Lotte, Grootenhuis, Martha A., Raat, Hein, van Rossum, Marion A. J., van Dulmen-den Broeder, Eline, Hoppenbrouwers, Karel, Correia, Helena, Cella, David, Roorda, Leo D., Terwee, Caroline B.
Published 2015