P Nieuwkerk

Summary

Affiliation: Academic Medical Center
Country: The Netherlands

Publications

  1. pmc HIV stigma and depressive symptoms are related to adherence and virological response to antiretroviral treatment among immigrant and indigenous HIV infected patients
    I Marion Sumari-de Boer
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    AIDS Behav 16:1681-9. 2012
  2. doi request reprint Intervention to improve adherence to lipid-lowering medication and lipid-levels in patients with an increased cardiovascular risk
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    Am J Cardiol 110:666-72. 2012
  3. doi request reprint Self-reported adherence is more predictive of virological treatment response among patients with a lower tendency towards socially desirable responding
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    Antivir Ther 15:913-6. 2010
  4. ncbi request reprint Are retrospective measures of change in quality of life more valid than prospective measures?
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center University of Amsterdam, Amsterdam, The Netherlands
    Med Care 45:199-205. 2007
  5. ncbi request reprint Self-reported adherence to antiretroviral therapy for HIV-1 infection and virologic treatment response: a meta-analysis
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    J Acquir Immune Defic Syndr 38:445-8. 2005
  6. ncbi request reprint Long-term quality of life outcomes in three antiretroviral treatment strategies for HIV-1 infection
    P T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    AIDS 15:1985-91. 2001
  7. ncbi request reprint Systemic methotrexate therapy versus laparoscopic salpingostomy in patients with tubal pregnancy. Part I. Impact on patients' health-related quality of life
    P T Nieuwkerk
    Department of Obstetrics and Gynecology, Academic Medical Center, University of Amsterdam, The Netherlands
    Fertil Steril 70:511-7. 1998
  8. ncbi request reprint Systemic methotrexate therapy versus laparoscopic salpingostomy in tubal pregnancy. Part II. Patient preferences for systemic methotrexate
    P T Nieuwkerk
    Department of Obstetrics and Gynecology, Academic Medical Center, University of Amsterdam, The Netherlands
    Fertil Steril 70:518-22. 1998
  9. ncbi request reprint Quality of life in asymptomatic- and symptomatic HIV infected patients in a trial of ritonavir/saquinavir therapy. The Prometheus Study Group
    P T Nieuwkerk
    Department of Medical Psychology, Tropical Medicine and AIDS, Academic Medical Center, University of Amsterdam, The Netherlands
    AIDS 14:181-7. 2000
  10. ncbi request reprint Limited patient adherence to highly active antiretroviral therapy for HIV-1 infection in an observational cohort study
    P T Nieuwkerk
    Department of Medical Psychology J4 410, Academic Medical Center, PO Box 22700, 1100 DE Amsterdam, The Netherlands
    Arch Intern Med 161:1962-8. 2001

Collaborators

Detail Information

Publications27

  1. pmc HIV stigma and depressive symptoms are related to adherence and virological response to antiretroviral treatment among immigrant and indigenous HIV infected patients
    I Marion Sumari-de Boer
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    AIDS Behav 16:1681-9. 2012
    ..Our findings suggest that HIV-stigma and depressive symptoms may be targets for interventions aimed at improving adherence and virological response among indigenous and immigrant HIV-infected patients...
  2. doi request reprint Intervention to improve adherence to lipid-lowering medication and lipid-levels in patients with an increased cardiovascular risk
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    Am J Cardiol 110:666-72. 2012
    ..In conclusion, cardiovascular risk-factor counseling resulted in improved lipid profiles in primary prevention patients and higher levels of adherence to statins and lower levels of anxiety in all patients...
  3. doi request reprint Self-reported adherence is more predictive of virological treatment response among patients with a lower tendency towards socially desirable responding
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    Antivir Ther 15:913-6. 2010
    ..We investigated whether stratifying patients according to their socially desirable response set might improve the prediction of virological treatment response by self-reported adherence...
  4. ncbi request reprint Are retrospective measures of change in quality of life more valid than prospective measures?
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center University of Amsterdam, Amsterdam, The Netherlands
    Med Care 45:199-205. 2007
    ..We investigated which of 3 commonly used methods for measuring change in QoL yielded the strongest associations with clinical measures of change in health status...
  5. ncbi request reprint Self-reported adherence to antiretroviral therapy for HIV-1 infection and virologic treatment response: a meta-analysis
    Pythia T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
    J Acquir Immune Defic Syndr 38:445-8. 2005
    ..We investigated whether this variability between studies about the effect of self-reported adherence on virologic treatment response could be attributed to study design features...
  6. ncbi request reprint Long-term quality of life outcomes in three antiretroviral treatment strategies for HIV-1 infection
    P T Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, Amsterdam, The Netherlands
    AIDS 15:1985-91. 2001
    ....
  7. ncbi request reprint Systemic methotrexate therapy versus laparoscopic salpingostomy in patients with tubal pregnancy. Part I. Impact on patients' health-related quality of life
    P T Nieuwkerk
    Department of Obstetrics and Gynecology, Academic Medical Center, University of Amsterdam, The Netherlands
    Fertil Steril 70:511-7. 1998
    ..To compare patients' health-related quality of life after systemic methotrexate therapy versus laparoscopic salpingostomy for tubal pregnancy...
  8. ncbi request reprint Systemic methotrexate therapy versus laparoscopic salpingostomy in tubal pregnancy. Part II. Patient preferences for systemic methotrexate
    P T Nieuwkerk
    Department of Obstetrics and Gynecology, Academic Medical Center, University of Amsterdam, The Netherlands
    Fertil Steril 70:518-22. 1998
    ..To investigate patient preferences for systemic methotrexate therapy relative to laparoscopic salpingostomy in the treatment of tubal pregnancy...
  9. ncbi request reprint Quality of life in asymptomatic- and symptomatic HIV infected patients in a trial of ritonavir/saquinavir therapy. The Prometheus Study Group
    P T Nieuwkerk
    Department of Medical Psychology, Tropical Medicine and AIDS, Academic Medical Center, University of Amsterdam, The Netherlands
    AIDS 14:181-7. 2000
    ....
  10. ncbi request reprint Limited patient adherence to highly active antiretroviral therapy for HIV-1 infection in an observational cohort study
    P T Nieuwkerk
    Department of Medical Psychology J4 410, Academic Medical Center, PO Box 22700, 1100 DE Amsterdam, The Netherlands
    Arch Intern Med 161:1962-8. 2001
    ..We investigated adherence to HAART among patients in a clinical cohort study...
  11. ncbi request reprint Adherence over 48 weeks in an antiretroviral clinical trial: variable within patients, affected by toxicities and independently predictive of virological response
    P Nieuwkerk
    Department of Medical Psychology, Academic Medical Center, University of Amsterdam, The Netherlands
    Antivir Ther 6:97-103. 2001
    ....
  12. doi request reprint Effect of bosentan on exercise capacity and quality of life in adults with pulmonary arterial hypertension associated with congenital heart disease with and without Down's syndrome
    Marielle G J Duffels
    Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
    Am J Cardiol 103:1309-15. 2009
    ..In conclusion, findings suggested that in patients without Down's syndrome, longer term bosentan treatment resulted in a persistent improvement in QoL and stabilization of exercise capacity...
  13. doi request reprint Health-related quality of life and survival among HIV-infected patients receiving highly active antiretroviral therapy: a study of patients in the AIDS Therapy Evaluation in the Netherlands (ATHENA) Cohort
    I Marion de Boer-van der Kolk
    Department of Medical Psychology, Tropical Medicine and AIDS, Department of Internal Medicine, Academic Medical Centre, Amsterdam, The Netherlands
    Clin Infect Dis 50:255-63. 2010
    ..This study investigates whether HRQL predicts survival among HIV-infected patients receiving HAART...
  14. doi request reprint Which method of adherence measurement is most suitable for daily use to predict virological failure among immigrant and non-immigrant HIV-1 infected patients?
    Jeannine F J B Nellen
    Department of Internal Medicine, Division of Infectious Diseases, Tropical Medicine and AIDS, and Centre for Infection and Immunity Amsterdam, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
    AIDS Care 21:842-50. 2009
    ..Interventions should be aimed at preventing patients to stop medication. A DM/PM below 0.85 can be indicative for patients who did stop medication and are at risk for virological failure...
  15. pmc Long-term MRA follow-up after coiling of intracranial aneurysms: impact on mood and anxiety
    Sandra P Ferns
    Department of Radiology, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
    Neuroradiology 53:343-8. 2011
    ..In coiled patients, we evaluated effects on mood and level of anxiety from long-term follow-up MRA in comparison to general population norms...
  16. ncbi request reprint HIV couples' anxiety and risk taking during ART
    Elisabeth van Leeuwen
    Center for Reproductive Medicine, Department of Obstetrics and Gynecology, Amsterdam, The Netherlands
    Fertil Steril 90:456-8. 2008
    ..Both men and women displayed high state anxiety levels, but despite their anxiety, women were prepared to take high risks to fulfill their desire for a child...
  17. ncbi request reprint Health-related quality of life and posttraumatic stress disorder among survivors of an outbreak of Legionnaires disease
    Kamilla D Lettinga
    Department of Internal Medicine, Division of Infectious Diseases, Tropical Medicine, and AIDS, Academic Medical Center, 1105 AZ Amsterdam, The Netherlands
    Clin Infect Dis 35:11-7. 2002
    ..However, awareness of this problem by health care providers may improve the aftercare of patients...
  18. ncbi request reprint Effects of active treatment discontinuation in patients with a CD4+ T-cell nadir greater than 350 cells/mm3: 48-week Treatment Interruption in Early Starters Netherlands Study (TRIESTAN)
    Katalin Pogany
    Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands
    J Acquir Immune Defic Syndr 44:395-400. 2007
    ..To evaluate the safety and efficacy of discontinuing highly active antiretroviral therapy (HAART) in HIV-1-positive patients who initiated HAART at a CD4+ T-cell count >350 cells/mm...
  19. doi request reprint Long-term effect of polyalkylimide gel injections on severity of facial lipoatrophy and quality of life of HIV-positive patients
    Refaat B Karim
    Department of Plastic and Reconstructive Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands
    Aesthetic Plast Surg 32:873-8. 2008
    ..We assessed the long-term effects of polyalkylimide gel injections on the severity of lipoatrophy and quality of life of patients on HAART...
  20. doi request reprint Relation of physical activity, cardiac function, exercise capacity, and quality of life in patients with a systemic right ventricle
    Michiel M Winter
    Department of Cardiology, Academic Medical Center, Amsterdam, The Netherlands
    Am J Cardiol 102:1258-62. 2008
    ..In conclusion, physical activity in patients with a systemic RV is positively associated with exercise capacity and quality of life, irrespective of cardiac performance...
  21. ncbi request reprint Patients' preferences regarding the timing of highly active antiretroviral therapy initiation for chronic asymptomatic HIV-1 infection
    Mirjam Locadia
    Department of Medical Psychology, Academic Medical Center, Amsterdam, Netherlands
    Antivir Ther 11:335-41. 2006
    ..We investigated patients' preferences for immediate HAART initiation relative to delaying HAART for 1 year...
  22. ncbi request reprint Patient-controlled analgesia versus continuous infusion of morphine during vaso-occlusive crisis in sickle cell disease, a randomized controlled trial
    Eduard J van Beers
    Department of Hematology, Academic Medical Centre, Amsterdam, The Netherlands
    Am J Hematol 82:955-60. 2007
    ..PCA results in adequate pain relief at a much lower morphine consumption and should considered to be the first choice in morphine administration to sickle cell patients admitted with vaso-occlusive crisis...
  23. doi request reprint An assessment of factorial structure and health-related quality of life in problem drug users using the Short Form 36 Health Survey
    Angela Buchholz
    Department of Clinical Psychology, University of Muenster, Muenster, Germany
    Qual Life Res 17:1021-9. 2008
    ..To confirm the factorial structure of the Short Form 36 Health Survey (SF-36) in problem drug users and to compare their health-related quality of life (HRQOL) with general Dutch population norms...
  24. ncbi request reprint Does electronic monitoring of adherence reduce social desirability on patients' self-reports of adherence?
    Pythia T Nieuwkerk
    J Acquir Immune Defic Syndr 36:880. 2004
  25. ncbi request reprint Quality of life after starting highly active antiretroviral therapy for chronic HIV-1 infection at different CD4 cell counts
    Pythia T Nieuwkerk
    J Acquir Immune Defic Syndr 45:600-1. 2007
  26. ncbi request reprint Electronic monitoring of adherence to highly active antiretroviral therapy changes medication-taking behaviour?
    Pythia T Nieuwkerk
    AIDS 17:1417-8. 2003
  27. ncbi request reprint Treatment failure of nelfinavir-containing triple therapy can largely be explained by low nelfinavir plasma concentrations
    David M Burger
    Department of Clinical Pharmacy, University Medical Center, Nijmegen, The Netherlands
    Ther Drug Monit 25:73-80. 2003
    ..014). Virologic failure of nelfinavir-containing triple therapy can be explained, to a large extent, by low plasma levels of nelfinavir...