Sigrid C.J.M. Vervoort

Sigrid C.J.M. Vervoort


Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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21 August 2014 in BMC Medicine
Verified
Journal Article
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NLNienke Langebeek
Nienke Langebeek
EGElizabeth H Gisolf
Elizabeth H Gisolf
PRPeter Reiss
Peter Reiss
SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
THThóra B Hafsteinsdóttir
Thóra B Hafsteinsdóttir
PNPythia T Nieuwkerk
Pythia T Nieuwkerk
Adherence to combination antiretroviral therapy (ART) is a key predictor of the success of human immunodeficiency virus (HIV) treatment, and is potentially amenable to intervention. Insight into predictors or correlates of non-adherence to ART may help guide targets for the development of adherence-enhancing interventions. Our objective was to review evidence on predictors/correlates of adherence to ART, and to aggregate findings into quantitative estimates of their impact on adherence. We searched PubMed for original English-language papers, published between 1996 and June 2014, and the reference lists of all relevant articles found. Studies reporting on predictors/correlates of adherence of adults prescribed ART for chronic HIV infection were included without restriction to adherence assessment method, study design or geographical location. Two researchers independently extracted the data from the same papers. Random effects models with inverse variance weights were used to aggregate findings into pooled effects estimates with 95% confidence intervals. The standardized mean difference (SMD) was used as the common effect size. The impact of study design features (adherence assessment method, study design, and the United Nations Human Development Index (HDI) of the country in which the study was set) was investigated using categorical mixed effects meta-regression. In total, 207 studies were included. The following predictors/correlates were most strongly associated with adherence: adherence self-efficacy (SMD = 0.603, P = 0.001), current substance use (SMD = -0.395, P = 0.001), concerns about ART (SMD = -0.388, P = 0.001), beliefs about the necessity/utility of ART (SMD = 0.357, P = 0.001), trust/satisfaction with the HIV care provider (SMD = 0.377, P = 0.001), depressive symptoms (SMD = -0.305, P = 0.001), stigma about HIV (SMD = -0.282, P = 0.001), and social support (SMD = 0.237, P = 0.001). Smaller but significant associations were observed for the following being prescribed a protease inhibitor-containing regimen (SMD = -0.196, P = 0.001), daily dosing frequency (SMD = -0.193, P = 0.001), financial constraints (SMD -0.187, P = 0.001) and pill burden (SMD = -0.124, P = 0.001). Higher trust/satisfaction with the HIV care provider, a lower daily dosing frequency, and fewer depressive symptoms were more strongly related with higher adherence in low and medium HDI countries than in high HDI countries. These findings suggest that adherence-enhancing interventions should particularly target psychological factors such as self-efficacy and concerns/beliefs about the efficacy and safety of ART. Moreover, these findings suggest that simplification of regimens might have smaller but significant effects.

30 January 2007 in AIDS
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Journal Article
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SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
JBJan Cc Borleffs
Jan Cc Borleffs
AHAndy Im Hoepelman
Andy Im Hoepelman
MGMieke Hf Grypdonck
Mieke Hf Grypdonck

4 October 2018 in BMC Health Services Research
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Journal Article
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YKY. J. G. Korpershoek
Y. J. G. Korpershoek
SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
JTJ. C. A. Trappenburg
J. C. A. Trappenburg
MSM. J. Schuurmans
M. J. Schuurmans
Self-management of exacerbations in COPD patients is important to reduce exacerbation impact. There is a need for more comprehensive and individualized interventions to improve exacerbation-related self-management behavior. The use of mobile health (mHealth) could help to achieve a wide variety of behavioral goals. Understanding of patients and health care providers perspectives towards using mHealth in promoting self-management will greatly enhance the development of solutions with optimal usability and feasibility. Therefore, the aim of this study was to explore perceptions of COPD patients and their health care providers towards using mHealth for self-management of exacerbations. A qualitative study using focus group interviews with COPD patients (n = 13) and health care providers (HCPs) (n = 6) was performed to explore perceptions towards using mHealth to support exacerbation-related self-management. Data were analyzed by a thematic analysis. COPD patients and HCPs perceived mostly similar benefits and barriers of using mHealth for exacerbation-related self-management. These perceived benefits and barriers seem to be important drivers in the willingness to use mHealth. Both patients and HCPs strengthen the need for a multi-component and tailored mHealth intervention that improves patients’ exacerbation-related self-management by determining their health status and providing adequate information, decision support and feedback on self-management behavior. Most importantly, patients and HCPs considered an mHealth intervention as support to improve self-management and emphasized that it should never replace patients’ own feelings nor undermine their own decisions. In addition, the intervention should be complementary to regular contact with HCPs, as personal contact with a HCP was considered to be very important. To optimize engagement with mHealth, patients should have a positive attitude toward using mHealth and an mHealth intervention should be attractive, rewarding and safe. This study provided insight into perceptions of COPD patients and their HCPs towards using mHealth for self-management of exacerbations. This study points out that future mHealth interventions should focus on developing self-management skills over time by providing adequate information, decision support and feedback on self-management behavior and that mHealth should complement regular care. To optimize engagement, mHealth interventions should be attractive, rewarding, safe and tailored to the patient needs.

19 September 2024 in European Journal of Cardiovascular Nursing
Verified
Journal Article
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HWHeleen Westland
Heleen Westland
SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
MKMarijke Kars
Marijke Kars
TJTiny Jaarsma
Tiny Jaarsma
Interviewing participants on sensitive topics is challenging and requires carefully planned and executed strategies throughout the research process. Sensitive topics have the potential to cause distress to participants or researchers. In this methods paper, strategies for conducting interviews on sensitive topics are described, including choosing the appropriate interview approach, creating a safe and comfortable environment, building rapport, utilizing sensitive and open questioning, reflexivity of the researcher, and awareness of the potential therapeutic effect of the interviews on participants. The strategies are illustrated with experiences from research on sensitive topics.

28 April 2009 in AIDS Care
Verified
Journal Article
Closed access
SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
MGMieke H.F. Grypdonck
Mieke H.F. Grypdonck
AGAnnelies de Grauwe
Annelies de Grauwe
AHAndy I.M. Hoepelman
Andy I.M. Hoepelman
JBJan C.C. Borleffs
Jan C.C. Borleffs
In order to explore and clarify the underlying processes which lead to (non)-adherence behavior in patients treated with highly active antiretroviral therapy (HAART), a qualitative study was conducted. Thirty-seven in-depth interviews were held with 30 Caucasian HIV-positive patients. Additional data were collected by diaries kept by some participants. The analysis took place in a cyclic process; selection of themes was alternated with input of new material. Adherence to HAART is mainly influenced by the experience of being HIV positive. Acceptance or non-acceptance of HIV leads to one of two basic stances toward adherence: "being determined to be adherent" or "medication is subordinate to other priorities in life". This stance determines the commitment to therapy and influences how patients cope with adherence. Patients who are determined to be adherent find solutions to adherence problems. Patients who are not determined to be adherent solve problems only if the solution does not compromise important aspects of their lives. Insight is provided into the manner in which prevalent themes; "start of HAART", "attitude toward medication", "HAART in daily life", "contextual factors", "health and HAART" and "being informed", influence adherence behavior. Before starting HAART the focus should be on helping the patient to accept HIV as a part of life. The findings need to be taken into account in adherence-promoting interventions.

25 February 2022 in Journal of Virus Eradication
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Journal Article
Open access
KRKim A.G.J. Romijnders
Kim A.G.J. Romijnders
LGLaura de Groot
Laura de Groot
SVSigrid C.J.M. Vervoort
Sigrid C.J.M. Vervoort
MBMaartje G.J. Basten
Maartje G.J. Basten
BWBerend J. van Welzen
Berend J. van Welzen
GRGanna Rozhnova
Ganna Rozhnova
When an HIV cure becomes available, it will have consequences for people living with HIV (PLHIV) and key populations who are vulnerable to HIV. This qualitative study aimed to explore the perceived impact of two HIV cure scenarios (post-treatment control when HIV is suppressed without the need for ongoing antiretroviral treatment (ART) and complete HIV elimination) on the quality of life of PLHIV and key populations living without HIV in the Netherlands. Participants were purposefully sampled from the Amsterdam Cohort Studies, the AGEhIV Cohort Study, the outpatient clinic of the University Medical Centre Utrecht and the Dutch HIV Association to increase variability. Semi-structured in-depth interviews were conducted between October 2020 and March 2021 and thematically analysed. Of the 42 interviewed participants, 29 were PLHIV and 13 represented key populations (i.e., men who have sex with men and people injecting drugs). Both PLHIV and participants from vulnerable key populations hoped that a cure would result in normalization of their lives by removing the need to disclose HIV, reducing stigma and guilt, increasing independence of ART, and liberating sexual behaviour. Both groups believed only HIV elimination could accomplish this desired impact. While the post-treatment control scenario seems a more plausible outcome of current HIV cure research, our findings highlight that participants may not perceive it as a true cure. Involvement of PLHIV and vulnerable key populations in devising acceptable and feasible experimental approaches to HIV cure is essential to ensure their future successful implementation.