10 results on '"Dykgraaf, R. H M"'
Search Results
2. Hospital costs during the first 5 years of life for multiples compared with singletons born after IVF or ICSI
- Author
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van Heesch, M. M. J., Evers, J. L. H., van der Hoeven, M. A. H. B. M., Dumoulin, J. C. M., van Beijsterveldt, C. E. M., Bonsel, G. J., Dykgraaf, R. H. M., van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L. D. M., Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., and Dirksen, C. D.
- Published
- 2015
- Full Text
- View/download PDF
3. Cost-effectiveness of embryo transfer strategies : a decision analytic model using long-term costs and consequences of singletons and multiples born as a consequence of IVF
- Author
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van Heesch, M M J, van Asselt, A D I, Evers, J L H, van der Hoeven, M A H B M, Dumoulin, J C M, van Beijsterveldt, C E M, Bonsel, G J, Dykgraaf, R H M, van Goudoever, J B, Koopman-Esseboom, C, Nelen, W L D M, Steiner, K, Tamminga, P, Tonch, N, Torrance, H L, Dirksen, C D, van Heesch, M M J, van Asselt, A D I, Evers, J L H, van der Hoeven, M A H B M, Dumoulin, J C M, van Beijsterveldt, C E M, Bonsel, G J, Dykgraaf, R H M, van Goudoever, J B, Koopman-Esseboom, C, Nelen, W L D M, Steiner, K, Tamminga, P, Tonch, N, Torrance, H L, and Dirksen, C D
- Published
- 2016
4. Cost-effectiveness of embryo transfer strategies: a decision analytic model using long-term costs and consequences of singletons and multiples born as a consequence of IVF
- Author
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Geboortecentrum voorzitterschap, Other research (not in main researchprogram), MS Neonatologie, Brain, Fertiliteitartsen, Child Health, van Heesch, M M J, van Asselt, A D I, Evers, J L H, van der Hoeven, M A H B M, Dumoulin, J C M, van Beijsterveldt, C E M, Bonsel, G J, Dykgraaf, R H M, van Goudoever, J B, Koopman-Esseboom, C, Nelen, W L D M, Steiner, K, Tamminga, P, Tonch, N, Torrance, H L, Dirksen, C D, Geboortecentrum voorzitterschap, Other research (not in main researchprogram), MS Neonatologie, Brain, Fertiliteitartsen, Child Health, van Heesch, M M J, van Asselt, A D I, Evers, J L H, van der Hoeven, M A H B M, Dumoulin, J C M, van Beijsterveldt, C E M, Bonsel, G J, Dykgraaf, R H M, van Goudoever, J B, Koopman-Esseboom, C, Nelen, W L D M, Steiner, K, Tamminga, P, Tonch, N, Torrance, H L, and Dirksen, C D
- Published
- 2016
5. Hospital costs during the first 5 years of life for multiples compared with singletons born after IVF or ICSI
- Author
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Van Heesch, M. M J, Evers, J. L H, Van Der Hoeven, M. A H B M, Dumoulin, J. C M, Van Beijsterveldt, C. E M, Bonsel, G. J., Dykgraaf, R. H M, Van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L D M, Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., Dirksen, C. D., Van Heesch, M. M J, Evers, J. L H, Van Der Hoeven, M. A H B M, Dumoulin, J. C M, Van Beijsterveldt, C. E M, Bonsel, G. J., Dykgraaf, R. H M, Van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L D M, Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., and Dirksen, C. D.
- Published
- 2015
6. Hospital costs during the first 5 years of life for multiples compared with singletons born after IVF or ICSI
- Author
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Fertiliteitartsen, Child Health, CTI Leusen, Geboortecentrum voorzitterschap, MS Neonatologie, Van Heesch, M. M J, Evers, J. L H, Van Der Hoeven, M. A H B M, Dumoulin, J. C M, Van Beijsterveldt, C. E M, Bonsel, G. J., Dykgraaf, R. H M, Van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L D M, Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., Dirksen, C. D., Fertiliteitartsen, Child Health, CTI Leusen, Geboortecentrum voorzitterschap, MS Neonatologie, Van Heesch, M. M J, Evers, J. L H, Van Der Hoeven, M. A H B M, Dumoulin, J. C M, Van Beijsterveldt, C. E M, Bonsel, G. J., Dykgraaf, R. H M, Van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L D M, Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., and Dirksen, C. D.
- Published
- 2015
7. Cost-effectiveness of embryo transfer strategies: a decision analytic model using long-term costs and consequences of singletons and multiples born as a consequence of IVF.
- Author
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van Heesch, M. M. J., van Asselt, A. D. I, Evers, J. L. H., van der Hoeven, M. A. H. B. M., Dumoulin, J. C. M., van Beijsterveldt, C. E. M., Bonsel, G. J., Dykgraaf, R. H. M., van Goudoever, J. B., Koopman-Esseboom, C., Nelen, W. L. D. M., Steiner, K., Tamminga, P., Tonch, N., Torrance, H. L., and Dirksen, C. D.
- Subjects
EMBRYO transfer ,FERTILIZATION in vitro ,COST effectiveness ,MEDICAL decision making ,QUALITY of life ,BIRTH rate ,DECISION making ,MULTIPLE pregnancy ,RETROSPECTIVE studies ,QUALITY-adjusted life years ,STATISTICAL models ,ECONOMICS - Abstract
Study Question: What is the cost-effectiveness of elective single embryo transfer (eSET) versus double embryo transfer (DET) strategies from a societal perspective, when applying a time horizon of 1, 5 and 18 years?Summary Answer: From a short-term perspective (1 year) it is cost-effective to replace DET with single embryo transfer; however when intermediate- (5 years) and long-term (18 years) costs and consequences are incorporated, DET becomes the most cost-effective strategy, given a ceiling ratio of €20 000 per quality-adjusted life years (QALY) gained.What Is Already Known: According to previous cost-effectiveness research into embryo transfer strategies, DET is considered cost-effective if society is willing to pay around €20 000 for an extra live birth. However, interpretation of those studies is complicated, as those studies fail to incorporate long-term costs and outcomes and used live birth as a measure of effectiveness instead of QALYs. With this outcome, both multiple and singletons were valued as one live birth, whereas costs of all children of a multiple were incorporated.Study Design, Size, Duration: A Markov model (cycle length: 1 year; time horizon: 1, 5 and 18 years) was developed comparing a maximum of: (i) three cycles of eSET in all patients; (ii) four cycles of eSET in all patients; (iii) five cycles of eSET in all patients; (iv) three cycles of standard treatment policy (STP), i.e. eSET in women <38 years with a good quality embryo, and DET in all other women; and (v) three cycles of DET in all patients.Participants/materials, Setting, Methods: Expected life years (LYs), child QALYs and costs were estimated for all comparators. Input parameters were derived from a retrospective cohort study, in which hospital resource data were collected (n=580) and a parental questionnaire was sent out (431 respondents). Probabilistic sensitivity analysis (5000 iterations) was performed.Main Results and the Role Of Chance: With a time horizon of 18 years, DETx3 is most effective (0.54 live births, 10.2 LYs and 9.8 QALYs) and expensive (€37 871) per couple starting IVF. Three cycles of eSET are least effective (0.43 live births, 7.1 LYs and 6.8 QALYs) and expensive (€25 563). We assumed that society is willing to pay €20 000 per QALY gained. With a time horizon of 1 year, eSETx3 was the most cost-effective embryo transfer strategy with a probability of being cost-effective of 99.9%. With a time horizon of 5 or 18 years, DETx3 was most cost-effective, with probabilities of being cost-effective of 77.3 and 93.2%, respectively.Limitations, Reasons For Caution: This is the first study to use QALYs generated by the children in the economic evaluation of embryo transfer strategies. There remains some disagreement on whether QALYs generated by new life should be used in economic evaluations of fertility treatment. A further limitation is that treatment ends when it results in live birth and that only child QALYs were considered as measure of effectiveness. The results for the time horizon of 18 years might be less solid, as the data beyond the age of 8 years are based on extrapolation.Wider Implications Of the Findings: The current Markov model indicates that when child QALYs are used as measure of outcome it is not cost-effective on the long term to replace DET with single embryo transfer strategies. However, for a balanced approach, a family-planning perspective would be preferable, including additional treatment cycles for couples who wish to have another child. Furthermore, the analysis should be extended to include QALYs of family members.Study Funding/competing Interests: This study was supported by a research grant (grant number 80-82310-98-09094) from the Netherlands Organization for Health Research and Development (ZonMw). There are no conflicts of interest in connection with this article.Trial Registration Number: Not applicable. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
8. The prediction of progression-free and overall survival in women with an advanced stage of epithelial ovarian carcinoma.
- Author
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Gerestein, C. G., Eijkemans, M. J. C., de Jong, D., van der Burg, M. E. L., Dykgraaf, R. H. M., Kooi, G. S., Baalbergen, A., Burger, C. W., and Ansink, A. C.
- Subjects
EPITHELIAL cells ,CANCER ,OVARIAN cancer ,THERAPEUTICS ,PHARMACOLOGY - Abstract
Objective Prognosis in women with ovarian cancer mainly depends on International Federation of Gynecology and Obstetrics stage and the ability to perform optimal cytoreductive surgery. Since ovarian cancer has a heterogeneous presentation and clinical course, predicting progression-free survival (PFS) and overall survival (OS) in the individual patient is difficult. The objective of this study was to determine predictors of PFS and OS in women with advanced stage epithelial ovarian cancer (EOC) after primary cytoreductive surgery and first-line platinum-based chemotherapy. Design Retrospective observational study. Setting Two teaching hospitals and one university hospital in the south-western part of the Netherlands. Population Women with advanced stage EOC. Methods All women who underwent primary cytoreductive surgery for advanced stage EOC followed by first-line platinum-based chemotherapy between January 1998 and October 2004 were identified. To investigate independent predictors of PFS and OS, a Cox’ proportional hazard model was used. Nomograms were generated with the identified predictive parameters. Main outcome measures The primary outcome measure was OS and the secondary outcome measures were response and PFS. Results A total of 118 women entered the study protocol. Median PFS and OS were 15 and 44 months, respectively. Preoperative platelet count ( P = 0.007), and residual disease <1 cm ( P = 0.004) predicted PFS with a optimism corrected c-statistic of 0.63. Predictive parameters for OS were preoperative haemoglobin serum concentration ( P = 0.012), preoperative platelet counts ( P = 0.031) and residual disease <1 cm ( P = 0.028) with a optimism corrected c-statistic of 0.67. Conclusion PFS could be predicted by postoperative residual disease and preoperative platelet counts, whereas residual disease, preoperative platelet counts and preoperative haemoglobin serum concentration were predictive for OS. The proposed nomograms need to be externally validated. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
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9. The prediction of progression-free and overall survival in women with an advanced stage of epithelial ovarian carcinoma.
- Author
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Gerestein CG, Eijkemans MJ, de Jong D, van der Burg ME, Dykgraaf RH, Kooi GS, Baalbergen A, Burger CW, and Ansink AC
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- Adult, Aged, Aged, 80 and over, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Blood Platelets, Combined Modality Therapy, Disease-Free Survival, Female, Follow-Up Studies, Hemoglobins metabolism, Humans, Middle Aged, Neoplasm Recurrence, Local mortality, Nomograms, Ovarian Neoplasms drug therapy, Ovarian Neoplasms surgery, Platelet Count, Retrospective Studies, Treatment Outcome, Ovarian Neoplasms mortality
- Abstract
Objective: Prognosis in women with ovarian cancer mainly depends on International Federation of Gynecology and Obstetrics stage and the ability to perform optimal cytoreductive surgery. Since ovarian cancer has a heterogeneous presentation and clinical course, predicting progression-free survival (PFS) and overall survival (OS) in the individual patient is difficult. The objective of this study was to determine predictors of PFS and OS in women with advanced stage epithelial ovarian cancer (EOC) after primary cytoreductive surgery and first-line platinum-based chemotherapy., Design: Retrospective observational study., Setting: Two teaching hospitals and one university hospital in the south-western part of the Netherlands., Population: Women with advanced stage EOC., Methods: All women who underwent primary cytoreductive surgery for advanced stage EOC followed by first-line platinum-based chemotherapy between January 1998 and October 2004 were identified. To investigate independent predictors of PFS and OS, a Cox' proportional hazard model was used. Nomograms were generated with the identified predictive parameters., Main Outcome Measures: The primary outcome measure was OS and the secondary outcome measures were response and PFS., Results: A total of 118 women entered the study protocol. Median PFS and OS were 15 and 44 months, respectively. Preoperative platelet count (P = 0.007), and residual disease <1 cm (P = 0.004) predicted PFS with a optimism corrected c-statistic of 0.63. Predictive parameters for OS were preoperative haemoglobin serum concentration (P = 0.012), preoperative platelet counts (P = 0.031) and residual disease <1 cm (P = 0.028) with a optimism corrected c-statistic of 0.67., Conclusion: PFS could be predicted by postoperative residual disease and preoperative platelet counts, whereas residual disease, preoperative platelet counts and preoperative haemoglobin serum concentration were predictive for OS. The proposed nomograms need to be externally validated.
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- 2009
- Full Text
- View/download PDF
10. Pleomorphic adenoma of the vulva: a review illustrated by a clinical case.
- Author
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Dykgraaf RH, van Veen MM, van Bekkum-de Jonge EE, Gerretsen J, de Jong D, and Burger CW
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- Adenoma, Pleomorphic surgery, Aged, Diagnosis, Differential, Female, Humans, Prognosis, Vulvar Neoplasms surgery, Adenoma, Pleomorphic pathology, Vulvar Neoplasms pathology
- Abstract
The pleomorphic adenoma of the vulva is an extremely scarce diagnosis. This form of neoplasm is more frequently observed in other topographic sites of the human body. Treatment modalities largely derive from experiences with the pleomorphic adenoma located in these other sites. As a result of similarity with other tumors and scarcity of the neoplasm, the diagnosis of pleomorphic adenoma of the vulva is easily missed in daily routine practice. Recurrences of this neoplasm are frequently observed with an estimated incidence of malignant transformation of 25%. Addressing this previously mentioned issue, an extensive surgical excision and long-term follow-up is advocated. This report is illustrated by the case of a 66-year-old woman who was admitted to our hospital with a pleomorphic adenoma of the vulva, diagnosed by pathologic assessments following surgical excision. As a result of the rarity of this diagnosis, characteristics and treatment of extravulvar in addition to vulvar localizations of the pleomorphic adenoma are reviewed.
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- 2006
- Full Text
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