Searched for: author%3A%22Meijer%2C+P.%22
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Rad, M. (author), Kluft, C. (author), de Kam, M.L. (author), Meijer, P. (author), Cohen, A.F. (author), Grubb, G.S. (author), Constantine, G.D. (author), Burggraaf, J. (author)
Objectives?To compare the effects of a combined oral contraceptive (COC) taken continuously with those of one of similar composition taken cyclically on 30 variables related to haemostasis, lipids, carbohydrates, bone metabolism, and sex hormone-binding globulin (SHBG). Methods?Randomised, open-label, multicentre, comparative substudy of a...
article 2011
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Willemsen, G. (author), de Geus, E.J.C. (author), Bartels, M. (author), van Beijsterveldt, C.E.M.T. (author), Brooks, A.I. (author), Estourgie-van Burk, G.F. (author), Fugman, D.A. (author), Hoekstra, C. (author), Hottenga, J.-J. (author), Kluft, K. (author), Meijer, P. (author), Montgomery, G.W. (author), Rizzu, P. (author), Sondervan, D. (author), Smit, A.B. (author), Spijker, S. (author), Suchiman, H.E.D. (author), Tischfield, J.A. (author), Lehner, T. (author), Slagboom, P.E. (author), Boomsma, D.I. (author), TNO Kwaliteit van Leven (author)
In 2004 the Netherlands Twin Register (NTR) started a large scale biological sample collection in twin families to create a resource for genetic studies on health, lifestyle and personality. Between January 2004 and July 2008, adult participants from NTR research projects were invited into the study. During a home visit between 7:00 and 10:00 am...
article 2010
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Kluft, C. (author), Meijer, P. (author), LaGuardia, K.D. (author), Fisher, A.C. (author), TNO Kwaliteit van Leven (author)
Purpose: The aim of this study was to compare effects of the transdermal contraceptive patch, a desogestrel/ethinyl estradiol (EE)-containing, monophasic combination oral contraceptive (COC) and a levonorgestrel/EE-containing, triphasic COC on hemostasis variables. Study Design: This was a randomized, open-label study of 104 young women who...
article 2008
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Boomsma, D.I. (author), Willemsen, G. (author), Sullivan, P.F. (author), Heutink, P. (author), Meijer, P. (author), Sondervan, D. (author), Kluft, C. (author), Smit, G. (author), Nolen, W.A. (author), Zitman, F.G. (author), Smit, J.H. (author), Hoogendijk, W.J. (author), van Dyck, R. (author), de Geus, E.J.C. (author), Penninx, B.W.J.H. (author), TNO Kwaliteit van Leven (author)
To identify the genomic regions that confer risk and protection for major depressive disorder (MDD) in humans, large-scale studies are needed. Such studies should collect multiple phenotypes, DNA, and ideally, biological material that allows gene expression analysis, transcriptomic, proteomic, and metabolomic studies. In this paper, we briefly...
article 2008
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de Lau, L.M.L. (author), Cheung, E.Y.L. (author), Kluft, C. (author), Leebeek, F.W.G. (author), Meijer, P. (author), Laterveer, R. (author), Dippel, D.W.J. (author), de Maat, M.P.M. (author), TNO Kwaliteit van Leven (author)
Ischemic stroke is associated with leucocyte activation. Activated leucocytes release elastase, an enzyme that can degrade fibrinogen. Fibrinogen elastase degradation products (FgEDP) may serve as a specific marker of elastase proteolytic activity. In a case-control study of 111 ischemic stroke patients and 119 controls, significantly higher...
article 2008
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de Lange, M. (author), de Geus, E.J.C. (author), Kluft, C. (author), Meijer, P. (author), van Doornen, L.J.P. (author), Boomsma, D.I. (author), Snieder, H. (author), TNO Kwaliteit van Leven (author)
Differences in genetic influence on death from CHD between males and females have been reported. Haemostatic factors have consistently been associated with risk for coronary heart disease (CHD), but sex differences in genetic architecture have not been studied. This study in middle-aged twins investigates whether there are sex differences in...
article 2006
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van Doorn, M.B.A. (author), Espirito Santo, S.M. (author), Meijer, P. (author), Kamerling, I.M. (author), Schoemaker, R.C. (author), Dirsch, V. (author), Vollmar, A. (author), Haffner, T. (author), Gebhardt, R. (author), Cohen, A.F. (author), Princen, H.M. (author), Burggraaf, J. (author), TNO Kwaliteit van Leven (author)
Background: Epidemiologic studies suggest that garlic may have beneficial effects on risk factors associated with cardiovascular disease (CVD). However, these findings are not unambiguously supported by randomized placebo-controlled clinical trials. Objective: We sought to investigate the effects of a chemically well-characterized garlic...
article 2006
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Rad, M. (author), Kluft, C. (author), Ménard, J. (author), Burggraaf, J. (author), de Kam, M.L. (author), Meijer, P. (author), Sivin, I. (author), Sitruk-Ware, R.L. (author), TNO Kwaliteit van Leven (author)
Objective: This study aimed to compare the effects on hemostasis variables of a contraceptive vaginal ring with those of an oral contraceptive. Study design: Twenty-three and 22 healthy premenopausal women were randomized to the contraceptive vaginal ring (150 μg Nestorone and 15 μg ethinyl estradiol) or Stediril 30 during 3 cycles. Analysis of...
article 2006
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TNO Kwaliteit van Leven TNO Preventie en Gezondheid (author), Meijer, P. (author), Haverkate, F. (author), Kluft, C. (author), Moerloose, P.de (author), Verbruggen, B. (author), Spannagl, M. (author)
The numerical test results of different D-dimer assays vary widely. Because of the complexity of the analyte of target as well as the variability in specificity of different D-dimer assays, only harmonisation of the test results seems to be feasible. The use of a single conversion factor does not take into account for several methods the lack of...
article 2006
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Gaubius Instituut TNO Preventie en Gezondheid (author), Hoekstra, C. (author), Meijer, P. (author), Kluft, C. (author), Heutink, P. (author), Smit, G. (author), de Geus, E. (author), Smit, J.H. (author), van Bruggen, A. (author), Montgomery, G.W. (author), Boomsma, D.I. (author)
To locate the genes that make a substantial contribution to variation in natural dizygotic twinning in humans, large-scale studies are needed. New studies should not stop at DNA genotyping, but collect material that allow gene-expression analysis, transcriptomics, proteomics and endocrinology. In this article we describe a pilot study to examine...
article 2004
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Meijer, P. (author), Verbruggen, H.W. (author), de Weerd, B. (author), den Dool, E.J. (author), van Oerle, R. (author), Gaubius Instituut TNO (author)
The comparability of test results for protein S between laboratories is hampered by a high inter-laboratory variability. The effect of the use and type of common reference plasma on the inter-laboratory variability of the total and free protein S measurement was evaluated. The results of 10 plasma samples measured against a centrally distributed...
article 2002
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Meijer, P. (author), Verbruggen, H.W. (author), de Weerd, B. (author), Dubbeldam, J. (author), van Oerle, R. (author), Gaubius Instituut TNO (author)
In a previous study, a between-operator variability (CVOBETWEEN) of 9.6% and 15.0% was observed for total protein S antigen assays in 11 laboratories using a frozen or lyophilized reference plasma, respectively, and the need to standardize the use of lyophilized reference plasma was identified. The aim of the present study was to identify...
article 2002
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TNO Preventie en Gezondheid (author), Meijer, P. (author)
doctoral thesis 2002
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de Maat, M.P.M. (author), Dooijewaard, G. (author), Meijer, P. (author), Binder, B.R. (author), Keber, D. (author), Risberg, B. (author), Kluft, C. (author), Jespersen, J. (author), Gaubius Instituut TNO (author)
In most Westernized societies cardiovascular diseases are the leading cause of death over the age of 45 years and one-quarter of these deaths occur in men below the age of 65 years. The haemostasis system has been identified as an important system in cardiovascular disease (CVD). The European Concerted Action on Prevention from Thrombosis by...
article 2001
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Kemme, M.J.B. (author), Faaij, R.A. (author), Schoemaker, R.C. (author), Kluft, C. (author), Meijer, P. (author), Cohen, A.F. (author), Burggraaf, J. (author), Gaubius Instituut TNO (author)
During studies on warfarin, heparin and various anticoagulants with novel mechanisms of action, the activated partial thromboplastin time (aPTT) and the (apparent) international normalized ratio (INR) from a bedside monitor (Coagucheck Plus®) were compared with laboratory assay results. Data were compared using the Bland and Altman method of...
article 2001
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Kluft, C. (author), Meijer, P. (author), Gram, J. (author), Jespersen, J. (author), Gaubius instituut TNO (author)
article 1999
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de Valk-de Roo, G.W. (author), Stehouwer, C.D.A. (author), Meijer, P. (author), Mijatovic, V. (author), Kluft, C. (author), Kenemans, P. (author), Cohen, F. (author), Watts, S. (author), Netelenbos, C. (author), Gaubius instituut TNO (author)
Currently raloxifene, a selective estrogen receptor modulator, is being investigated as a potential alternative for postmenopausal hormone replacement to prevent osteoporosis and cardiovascular disease. We compared the 2-year effects of raloxifene on a wide range of cardiovascular risk factors with those of placebo and conjugated equine...
article 1999
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Clason, S.B. (author), Meijer, P. (author), Kluft, C. (author), Ersdal, E. (author), Gaubius instituut TNO (author)
Recently, a chromogenic kit for determination of plasmin inhibitor activity, Coamatic® Plasmin Inhibitor, has been developed with the aim to increase specificity and to allow application to a wide range of automates. The highly sensitive plasmin substrate S-2403 is used and, to further improve specificity, a low level of plasmin and a short...
article 1999
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Riese, H. (author), Vrijkotte, T. (author), Meijer, P. (author), Kluft, C. (author), de Geus, E. (author), Gaubius instituut TNO (author)
Interactions between lipoproteins and fibrinolytic parameters inducing cardiovascular disease are gradually being disclosed. The multivariate analyses often used in studies investigating this relationship implicitly assume 1) that the reliability of the parameters in a cluster is comparably high, and 2) that their covariance structure, i.e. the...
article 1999
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Gaubius Instituut TNO (author), Kluft, C. (author), Meijer, P. (author), Gram, J. (author), Jespersen, J. (author), Sidelmann, J. (author), te Koppele, J.M. (author), Buytenhek, M. (author)
conference paper 1999
Searched for: author%3A%22Meijer%2C+P.%22
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