- Randomized patients in IBS research had different disease characteristics compared to eligible and recruited patientsC J Bijkerk
Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, The Netherlands
J Clin Epidemiol 61:1176-81. 2008..We compared IBS patients who were selected, approached, and randomized to participate in a clinical trial assessing the efficacy of dietary fiber therapy in IBS...
- Soluble or insoluble fibre in irritable bowel syndrome in primary care? Randomised placebo controlled trialC J Bijkerk
Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, Netherlands
BMJ 339:b3154. 2009..To determine the effectiveness of increasing the dietary content of soluble fibre (psyllium) or insoluble fibre (bran) in patients with irritable bowel syndrome...
- Outcome measures in irritable bowel syndrome: comparison of psychometric and methodological characteristicsC J Bijkerk
Julius Center for General Practice and Patient Oriented Research, University Medical Center Utrecht, Utrecht, The Netherlands
Am J Gastroenterol 98:122-7. 2003..We aimed to evaluate and to compare the validity and appropriateness of available IBS outcome measures...