Publications by authors named "Gerjo Kok"

Article Synopsis
  • Hypertension (HPT) has become a major health issue in Ghana, shifting from a focus on communicable diseases to addressing non-communicable diseases amid rising prevalence rates.
  • A cost of illness framework was utilized to estimate the financial burden of treating HPT in Ghana, accounting for serious complications and employing a decision analytic model to simulate patient outcomes.
  • The study indicates a significantly high lifetime treatment cost for HPT (approximately GHS 869,106 or USD 119,056), along with an increasing mortality risk over the years, highlighting the need for targeted health policies and financial planning.
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Background: In this qualitative study we observed in-depth the impact of the visiting restriction policy (VRP, i.e. number of visitors allowed at home) on well-being and compliance during the COVID-19 pandemic to regulate infection rates.

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Nowadays the prediction and change of waste-related behaviors represent a key topic for scholars and policy makers. The theoretical mainstays applied to waste separation behavior, such as the Theory of Planned Behavior (TPB), the Norm Activation Model and the Value Belief Norm, do not include the construct of goal in their formulation. Other goal-focused theories, such as the Goal Systems Theory (GST), lack applications on separation behavior.

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Introduction: Understanding the individuals' willingness to pay (WTP) for the COVID-19 vaccine could help design policy interventions to control the COVID-19 pandemic. This study aimed to estimate the individuals' willingness to pay (WTP) for a COVID-19 vaccine and to identify its associated determinants.

Methods: A cross-sectional survey was conducted on 526 Iranian adults using a web-based questionnaire.

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Background: In the earlier developed and evaluated 12-week UPcomplish intervention, the aim was to reduce sedentary behaviour (SB) among office workers and increase their quality of life (QoL). In the current study, we explored moderators of effectiveness.

Method: We applied a stepped wedge design with five intervention groups starting with time lags of seven weeks (n = 142, 96 females).

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Introduction: Hypertension (HPT) is recognized as a significant public health problem worldwide from a health and economic perspective. This study determined predictors of nonadherence to HPT medications in Ghana using the health belief model.

Methods: A cross-sectional descriptive survey employing a quantitative approach was conducted among HPT patients who routinely attend clinics at selected hospitals in the Brong Ahafo region of Ghana.

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Background: Although several COVID-19 vaccines are available, the current challenge is achieving high vaccine uptake. We aimed to explore university students' intention to get vaccinated and select the most relevant determinants/beliefs to facilitate informed decision making around COVID-19 vaccine uptake.

Methods: A cross-sectional online survey with students ( = 434) from Maastricht University was conducted in March 2021.

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The process of developing a behavior change intervention can cover a long time period. However, in times of need, this development process has to be more efficient and without losing the scientific rigor. In this article, we describe the just-in-time, planned development of an online intervention in the field of higher education, promoting COVID-19 vaccination among university students, just before they were eligible for being vaccinated.

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Introduction: Intervention Mapping is the protocol used by the Kilimanjaro Diabetic Programme to plan, develop, implement, and evaluate an evidence-based screening programme for diabetic retinopathy. Two comic strips were developed to deliver the message on the need for diabetic retinopathy screening.

Objectives: The first objective was to develop a culturally appropriate and accessible health message to promote diabetic retinopathy screening for the target audience.

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Article Synopsis
  • - The Kilimanjaro Diabetic Programme used the Intervention Mapping framework to create a community-centered diabetic retinopathy screening initiative, focusing on health behavior change and prevention of blindness.
  • - Key methods included needs assessments, clinical trials, educational components for healthcare workers, and innovative motivational tools like comic strips, which collectively improved diabetes management in both urban and rural settings.
  • - The program successfully addressed barriers to screening, established mobile retinal screening, and initiated rural clinics, demonstrating a structured approach to enhance eye health among people with diabetes.
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Halfway through 2021 in the midst of a public health crisis, a new academic year was fast approaching. Dutch universities were preparing to reopen their campuses to students and personnel in a safe manner. As the vaccination uptake was increasing and societies were slowly reopening, inviting students and personnel to campus became the next step to "the new normal".

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COVID-19 vaccine hesitancy may be regarded as a new pandemic hindering the elimination of or coping with COVID-19. This study assessed reasons for COVID-19 vaccine hesitancy using the I-Change Model (ICM) by considering the role of informational and psychosocial factors. A cross-sectional online survey using a convenience sample was conducted among Dutch adults ( = 240).

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Rationale: Translating research evidence into clinical practice to improve care involves healthcare professionals adopting new behaviours and changing or stopping their existing behaviours. However, changing healthcare professional behaviour can be difficult, particularly when it involves changing repetitive, ingrained ways of providing care. There is an increasing focus on understanding healthcare professional behaviour in terms of non-reflective processes, such as habits and routines, in addition to the more often studied deliberative processes.

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Background: Sedentary behaviour (SB) affects cardiometabolic health and quality of life (QoL). We examine the effects of UPcomplish, a 12-week data-driven intervention, on SB, QoL and psychosocial determinants among office workers.

Methods: Participants were recruited via judgement sampling.

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In recent years, the research on human behaviour in relation to waste management has increased at an exponential rate. At the same time, the expanding academic literature on this topic makes it more difficult to understand the main areas of interest, the leading institutions and authors, the possible interconnections among different disciplines, and the gaps. This paper maps knowledge domain on recycling behaviour through bibliometric analysis and text mining in order to identify current trends, research networks and hot topics.

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We examined the degree and direction of sexual desire discrepancies (SDD) between partners and how this relates to sexual function, sexual satisfaction, relationship satisfaction in 100 Saudi Arabian couples, taking into account both partners' attachment orientation. Men and women reported better outcomes when they matched on higher levels of sexual desire. In case of a mismatch, women reported higher sexual satisfaction when their partner's level of sexual desire was higher than their own.

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Background: When reopening universities in times of COVID-19, students still have to adhere to COVID-19 behavioral guidelines. We explored what behavioral determinants (and underlying beliefs) related to the adherence to guidelines are both relevant and changeable, as input for future interventions.

Methods: A cross-sectional online survey was conducted (Oct-Nov 2020), identifying behavioral determinants (and underlying beliefs) of university students' adherence to COVID-19-guidelines, including keeping 1.

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Background: Hypertension has become an important public health concern in the developing world owing to rising prevalence and its adverse impact on ailing health systems. Despite being a modifiable risk factor for cardiovascular disease, hypertension has not received the needed attention in Ghana as a result of various competing interests for scarce health resources. This systematic review and meta-analysis provides a comprehensive and updated summary of the literature on the prevalence of hypertension in Ghana.

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Current research funding models for health psychologists tend to be biased toward support for large-scale 'definitive' behavioural trials. This approach emphasizes rigorous tests of one or more key questions, but, unintentionally, may lead to the funding of interventions that are based on myriad untested assumptions. We propose that future funding models should provide support for 'iterative' research that tests assumptions at each stage of the intervention development process, including design, deployment, efficacy, implementation, and sustainability.

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Background: Self-identity has frequently been proposed as a useful addition to the Theory of Planned Behavior; yet Fishbein and Ajzen decided to not include self-identity when they published that theory's successor, the Reasoned Action Approach. One of their reasons for exclusion is the lack of clear conceptual independence, as manifested in self-identity operationalizations that often conflate the construct with attitudinal or normative measures. Therefore, establishing whether self-identity has added value in the Reasoned Action Approach first requires synthesis of the used operationalisations to develop an operationalization that captures self-identity but not attitude and perceived norm.

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Background: Hypertension (HPT) is an essential public health problem affecting both lower and middle-income countries disproportionately. Evidence suggests that HPT is the leading risk factor for cardiovascular diseases and chronic kidney disease. Yet, challenges faced by patients with HPT in Ghana are not sufficiently explored.

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To improve sexual health among people living with HIV, sexual health should be addressed during consultations in routine HIV care. The aim of the present study was to investigate to what extent Sexual Health Counselling (SHC) is incorporated into routine Dutch HIV care and to explore differences between physicians and nurses in their practices and views regarding SHC. A cross-sectional survey was conducted among all HIV physicians (N=110) and HIV nurses (N=82) in the Netherlands.

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Introduction: This study is one of the first to examine the association between relationship and sexual variables as approached from a dyadic perspective in Saudi Arabian couples. Theoretical models assign an important role to relationship factors in women's sexuality.

Aim: We examined the role of sexual and relationship satisfaction relative to sexual desire in explaining sexual function in a sample of clinical versus nonclinical couples.

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