Publications by authors named "Xander Koolman"

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Substitution of surgical care within benign gynaecology during COVID-19: waste of a good crisis? - a quantitative longitudinal study in the Netherlands.
Eva L M Velthuijs, Ismail Ismail, Xander Koolman, Robert A de Leeuw, Wouter J K Hehenkamp

BMJ Open· August 2025

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Considering the full care pathway in regional variation in paediatric otitis media treatment in the Netherlands: an observational study.
Vera de Weerdt, Christel van Dijk, Jako Burgers, Kati Gaspar, Karin Hek, Xander Koolman

BMJ Open· August 2025

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Non-medical barriers and facilitators of ageing in place: a cohort study in the Netherlands.
Fatima Amankour, Yvonne Krabbe-Alkemade, Xander Koolman, Marjolein Broese van Groenou, France Portrait

Eur J Ageing· May 2025

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Utilisation of a cocreation methodology to develop claims-based indicators for feedback on implementation of comparative effectiveness research results into practice.
Vera de Weerdt, Hanna Willems, Geeske Hofstra, Sjoerd Repping, Xander Koolman

BMJ Open Qual· March 2025

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Regional variation in health care substitution for intrauterine device insertion: a retrospective cohort study.
Maarten D Vink, France R Portrait, Tim van Wezep, Xander Koolman, Ben W Mol

BMC Prim Care· August 2024

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Length of hospital stays and financial incentives: evidence from Dutch rehabilitation centers.
Katalin Gaspar, Ramsis Croes, Misja Mikkers, Xander Koolman

Eur J Health Econ· July 2024

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Regional practice variation in hysterectomy and the implementation of less invasive surgical procedures: A register-based study in the Netherlands.
Maarten D H Vink, France R M Portrait, Wouter J K Hehenkamp, Tim van Wezep, Xander Koolman

Acta Obstet Gynecol Scand· July 2024

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Measuring Active Purchasing in Healthcare: Analysing Reallocations of Funds Between Providers to Evaluate Purchasing Systems Performance in the Netherlands.
Niek Waltherus Stadhouders, Xander Koolman, Marit A C Tanke, Hans Maarse, Patrick P T Jeurissen

Int J Health Policy Manag· April 2024

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Attributing practice variation by its sources: the case of varicose veins treatments in the Netherlands.
Luca Schippa, Katalin Gaspar, Eric van der Hijden, Xander Koolman

BMC Health Serv Res· November 2023

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Practice variation in the stepped care approach to idiopathic heavy menstrual bleeding: A population-based study.
Maarten D H Vink, France R M Portrait, Tim C van Wezep, Xander Koolman, Ben W Mol

Eur J Obstet Gynecol Reprod Biol· April 2023

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Identification of over- and undertreatment in the Dutch national cervical cancer screening program: A data linkage study at the hospital level.
Maarten D Vink, Geeske Hofstra, Xander Koolman, Ruud L Bekkers, Albert G Siebers

Prev Med Rep· April 2023

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Provider responses to discontinuous tariffs: evidence from Dutch rehabilitation care.
Katalin Gaspar, Xander Koolman

Int J Health Econ Manag· September 2022

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Do patients' preferences prevail in hospital selection?: a comparison between discrete choice experiments and revealed hospital choice.
Benjamin H Salampessy, David Ikkersheim, France R M Portrait, Xander Koolman

BMC Health Serv Res· September 2022

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The potential risk of using historic claims to set bundled payment prices: the case of physical therapy after lower extremity joint replacement.
Sander Steenhuis, Geeske Hofstra, France Portrait, Fatima Amankour, Xander Koolman

BMC Health Serv Res· August 2022

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On the correlation between outcome indicators and the structure and process indicators used to proxy them in public health care reporting.
Benjamin H Salampessy, France R M Portrait, Eric van der Hijden, Ab Klink, Xander Koolman

Eur J Health Econ· November 2021

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Height and marital outcomes in the Netherlands, birth years 1841-1900.
Kristina Thompson, Xander Koolman, France Portrait

Econ Hum Biol· May 2021

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The Dutch COVID-19 approach: Regional differences in a small country.
Lieke Michaela Hoekman, Marlou Marriet Vera Smits, Xander Koolman

Health Policy Technol· December 2020

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Assessing risk of bias: a proposal for a unified framework for observational studies and randomized trials.
Hendrika J Luijendijk, Matthew J Page, Huibert Burger, Xander Koolman

BMC Med Res Methodol· September 2020

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Design characteristics of studies on medical practice variation of caesarean section rates: a scoping review.
Maarten D H Vink, Piet J G M de Bekker, Xander Koolman, Maurits W van Tulder, Ralph de Vries

BMC Pregnancy Childbirth· August 2020

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On selecting quality indicators: preferences of patients with breast and colon cancers regarding hospital quality indicators.
Benjamin H Salampessy, Ward R Bijlsma, Eric van der Hijden, Xander Koolman, France R M Portrait

BMJ Qual Saf· July 2020

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Unraveling the Complexity in the Design and Implementation of Bundled Payments: A Scoping Review of Key Elements From a Payer's Perspective.
Sander Steenhuis, Jeroen Struijs, Xander Koolman, Johannes Ket, Eric VAN DER Hijden

Milbank Q· March 2020

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Global budget versus cost ceiling: a natural experiment in hospital payment reform in the Netherlands.
Katalin Gaspar, France Portrait, Eric van der Hijden, Xander Koolman

Eur J Health Econ· February 2020

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Practice variation in long-term care access and use: The role of the ability to pay.
Daisy Duell, Maarten Lindeboom, Xander Koolman, France Portrait

Health Econ· November 2019

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The marginal benefits of healthcare spending in the Netherlands: Estimating cost-effectiveness thresholds using a translog production function.
Niek Stadhouders, Xander Koolman, Christel van Dijk, Patrick Jeurissen, Eddy Adang

Health Econ· November 2019

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[Translating care evaluations into practice: a suggestion based on the healthcare professional's intrinsic motivation to improve].
Eric J E van der Hijden, Maarten D H Vink, Xander Koolman

Ned Tijdschr Geneeskd· October 2019

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