Karin M. Vermeulen
University Medical Center Groningen
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Featured researches published by Karin M. Vermeulen.
Value in Health | 2016
Matthijs M. Versteegh; Karin M. Vermeulen; Silvia M. A. A. Evers; G. Ardine de Wit; Rilana Prenger; Elly A. Stolk
BACKGROUND In 2009, a new version of the EuroQol five-dimensional questionnaire (EQ-5D) was introduced with five rather than three answer levels per dimension. This instrument is known as the EQ-5D-5L. To make the EQ-5D-5L suitable for use in economic evaluations, societal values need to be attached to all 3125 health states. OBJECTIVES To derive a Dutch tariff for the EQ-5D-5L. METHODS Health state values were elicited during face-to-face interviews in a general population sample stratified for age, sex, and education, using composite time trade-off (cTTO) and a discrete choice experiment (DCE). Data were modeled using ordinary least squares and tobit regression (for cTTO) and a multinomial conditional logit model (for DCE). Model performance was evaluated on the basis of internal consistency, parsimony, goodness of fit, handling of left-censored values, and theoretical considerations. RESULTS A representative sample (N = 1003) of the Dutch population participated in the valuation study. Data of 979 and 992 respondents were included in the analysis of the cTTO and the DCE, respectively. The cTTO data were left-censored at -1. The tobit model was considered the preferred model for the tariff on the basis of its handling of the censored nature of the data, which was confirmed through comparison with the DCE data. The predicted values for the EQ-5D-5L ranged from -0.446 to 1. CONCLUSIONS This study established a Dutch tariff for the EQ-5D-5L on the basis of cTTO. The values represent the preferences of the Dutch population. The tariff can be used to estimate the impact of health care interventions on quality of life, for example, in context of economic evaluations.
PLOS ONE | 2009
Claudia B.M. Bijen; Karin M. Vermeulen; Marian J.E. Mourits; Geertruida H. de Bock
Objective Comparative evaluation of costs and effects of laparoscopic hysterectomy (LH) and abdominal hysterectomy (AH). Data sources Controlled trials from Cochrane Central register of controlled trials, Medline, Embase and prospective trial registers. Selection of studies Twelve (randomized) controlled studies including the search terms costs, laparoscopy, laparotomy and hysterectomy were identified. Methods The type of cost analysis, perspective of cost analyses and separate cost components were assessed. The direct and indirect costs were extracted from the original studies. For the cost estimation, hospital stay and procedure costs were selected as most important cost drivers. As main outcome the major complication rate was taken. Findings Analysis was performed on 2226 patients, of which 1013 (45.5%) in the LH group and 1213 (54.5%) in the AH group. Five studies scored ≥10 points (out of 19) for methodological quality. The reported total direct costs in the LH group (
British Journal of Dermatology | 2010
Marielouise Schuttelaar; Karin M. Vermeulen; N Drukker; Pieter Jan Coenraads
63,997) were 6.1% higher than the AH group (
General Hospital Psychiatry | 2003
Karin M. Vermeulen; Jan-Paul Ouwens; Wim van der Bij; Wim J de Boer; Gerard H. Koëter; Elisabeth M TenVergert
60,114). The reported total indirect costs of the LH group (
Pharmacy World & Science | 1999
Paramjit Gill; M Makela; Karin M. Vermeulen; Nick Freemantle; G Ryan; T Thorsen; Flora Haaijer-Ruskamp
1,609) were half of the total indirect in the AH group (
European Journal of Heart Failure | 2013
Imke H. Kraai; Karin M. Vermeulen; Marie Louise Luttik; Tialda Hoekstra; Trijntje Jaarsma; Hans L. Hillege
3,139). The estimated mean major complication rate in the LH group (14.3%) was lower than in the AH group (15.9%). The estimated total costs in the LH group were
British Journal of Dermatology | 2011
Marie L. Schuttelaar; Karin M. Vermeulen; Pieter Jan Coenraads
3,884 versus
Clinical Transplantation | 2004
Karin M. Vermeulen; Henk Groen; Wim van der Bij; Michiel E. Erasmus; Gerard H. Koëter; Elisabeth M. TenVergert
3,312 in the AH group. The incremental costs for reducing one patient with major complication(s) in the LH group compared to the AH group was
European Journal of Cancer | 2011
Claudia B.M. Bijen; Geertruida H. de Bock; Karin M. Vermeulen; Henriette J.G. Arts; Henk G. ter Brugge; Rob van der Sijde; Arjen. A. Kraayenbrink; Marlies Y. Bongers; Ate G.J. van der Zee; Marian J.E. Mourits
35,750. Conclusions The shorter hospital stay in the LH group compensates for the increased procedure costs, with less morbidity. LH points in the direction of cost effectiveness, however further research is warranted with a broader costs perspective including long term effects as societal benefit, quality of life and survival.
Psychological Reports | 2001
Em TenVergert; Karin M. Vermeulen; Albert Geertsma; Pj van Enckevort; W.J. de Boer; W. van der Bij; Gh Koeter
Background We hypothesized that a nurse practitioner would improve the quality of life of a child with eczema more than a dermatologist because of a structured intervention and more consultation time.