As a general practitioner and epidemiologist, my previous works were mainly on urological research, especially the epidemiology of male lower urinary tract symptoms (including nocturia), and prostate cancer screening in general practice. 

Currently, I am the programleader of the research program 'Pelvic- and abdominal problems in general practice'. This includes the following projects.

• URinControl 
  A randomized controlled trial comparing incontinence app to care as usual, for women with urinary incontinence in general practice.
  PhD project of Anne Loohuis, MD and Nienke Wessels, MD.
  Funded by ZonMw (250K).
  More information on www.urincontrol.nl 
• URinControl 4 men
  Development of a new, interactive, online selfmanagement program for men with lower urinary tract symptoms. Time series conducted in Isala, Martini Hospital adn Rijnstate (departments of urology).
  Researcher: Pim Brandenbarg, MSc.
  Funded by UMCG-Healthy ageing pilot (50K).
• Pelvicfloorcohort
  Prospecive cohort study in the general population on the prevalence and incidence of pelvicfloor symptoms in men and women. Data collection starting end 2018.
  Researcher: Grietje Knol (postdoc).
  Funded by ZonMW (499K)
• Alpha-Blocker Cohort (ABC)-study
  An observational cohort study in men with a new prescription for an alpha-blocker for lower urinary tract symptoms. Patients are recruited via collaborating pharmacists in the wider Zwolle region.
  Funded by Hein Hoogerzeil Stichting (11K).
• Child incontinentinence
  Mixed-method study, including qualitative approach towards expectations and experiences of children (and their parents) with urinary incontinence as the reason for referral to secondary care at Isala (Zwolle), questionnaire study involving referring GPS, retrospective and prospective database on diagnostic and treatment pathways.
  Researcher: Marleen Linde, MSc.
  Funded by Isala Innovation & Science (144K)
• Two cohort studies
  Women with prolapse or incontinence, referred to secondary care at Isala or Ommelander Ziekenhuis are followed for one year. At inclusion, women are asked for their treatment preferences and expectations. Diagnostic and treatment patterns are studied.
  Researcher: Alec Malmberg (dept of gynaecology)
  Funded by Isala Innovation & Science (2*14K).
• Kooking study: oral ondansetron in children with acute gastro-enteritis.
  Pragmatic randomised controlled trial in children visiting the out-of-hours GP-service for acute gastro-enteritis.
  PhD project for: vacancy.
  More information: click here.
• Treatment of constipation in children (Boki)
  Randomised controlled trial comparing pelvic physiotherapy with care as usual for children with constipation.
  PhD project for Jojanneke van Summeren, MSc.
  More information: click here.

Next, I am projectmember and supervisor for:

• Blending - Prescribing blended care combining face-to-face contacts with web-based guided self-help instead of antidepressants for depression in general practice; a cluster randomized pragmatic trial.
  PhD project of Btissame Massoudi.
  More information: click here.

And project leader of OnCohort, an observational cohort study on the psychosoclal impact of a false-positive colorectalcancer screening result. 

Recently finished:

• Enuresis in adolescents 
  Descriptive study on children and adolescents with enuresis (bedwetting), treated at the Dry Bed Center Meppel, the Netherlands. 
  PhD project of Ilse Hofmeester, MD.
  Promotor Wout Feitz, pediatric urologist RadboudUMC.
  Finished October 2016.
• The use of prostate specific antigen (PSA) test by general practitioners and non-urological specialists 
  Descriptive study among physicians and patients considering PSA tests applied for prostate cancer screening.
  PhD project of Saskia van der Meer, MD.
  Promotor Klaas van der Meer, professor emeritus of general practice, and Rien Nijman, professor of urology UMCG.
  Finished Oktober 2015
• Epidemiologic aspects of nocturia and nocturnal polyuria in older men - A longitudinal analysis in community dwelling older men: the Krimpen study
  PhD project of Boris van Doorn.
  Promotor Ruud Bosch, urologist at UMCU.
  Finished September 2014.