Publications by authors named "Barend J C Middelkoop"

Blood for determining 25-hydroxyvitamin D [25(OH)D] is usually obtained through venipuncture although, as an alternative for serum, dried blood spot (DBS) can be considered. The aim of this proof-of-concept study was to investigate levels of agreement between measurements of 25(OH)D obtained with DBS compared with serum. 301 Chinese participants were included who completed 25(OH)D measurement from DBS and from simultaneously collected blood samples obtained by venipuncture.

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The number of asylum seekers entering the Netherlands has increased. However, the screening, detection and treatment of infectious diseases in asylum seekers has barely changed over the last 15 years. Infectious diseases, including vaccine-preventable diseases are being carried into the Netherlands by asylum seekers.

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This article describes the development of the social network-based intervention which aims to improve diabetes self-management (DSM) among patients with type 2 diabetes living in socioeconomically deprived neighborhoods by stimulating social support for DSM and diminishing social influences hindering DSM (e.g., peer pressure and social norms).

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Objectives: Socioeconomically deprived patients with type 2 diabetes often face challenges with self-management, resulting in more diabetes-related complications. However, these groups are often under-represented in self-management interventions. Evidence on effective recruitment and retention strategies is growing, but lacking for intensive self-management interventions.

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Objectives: In South Asian populations, little is known about the effects of intensive interventions to reduce the risk of type 2 diabetes on health behaviour. We examined the effectiveness at 2 years of a culturally targeted lifestyle intervention on diet, physical activity and determinants of behaviour change among South Asians at risk for diabetes.

Design: Randomised controlled trial with de facto masking.

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Introduction: Vitamin D is essential for bone health since it stimulates the intestinal absorption of calcium and phosphorus from the gut, both necessary for bone mineralization. However, vitamin D deficiency is highly prevalent among several non-Western immigrant populations in the Netherlands. To date, there are no data available of the vitamin D status in the Chinese population residing in the Netherlands.

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Background: Ethnic minority and native Dutch groups with a low socioeconomic status (SES) are underrepresented in cardiometabolic health checks, despite being at higher risk. We investigated response and participation rates using three consecutive inexpensive-to-costly culturally adapted invitation steps for a health risk assessment (HRA) and further testing of high-risk individuals during prevention consultations (PC).

Methods: A total of 1690 non-Western immigrants and native Dutch with a low SES (35-70 years) from six GP practices were eligible for participation.

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Background: Direct comparisons of the effect of a glycated haemoglobin measurement or an oral glucose tolerance test on the uptake and yield of screening in people of South Asian origin have not been made. We evaluated this in 18 to 60-year-old South Asian Surinamese.

Materials And Methods: We invited 3173 South Asian Surinamese for an oral glucose tolerance test between June 18th 2009- December 31st 2009 and 2012 for a glycated hemoglobin measurement between April 19th 2010-November 11th, 2010.

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Children of parents with a mental illness (COPMI) are at increased risk for developing psychiatric disorders, especially when parenting is compromised by multiple risk factors. Due to fragmented services, these families often do not get the support they need. Can coordination between services, as developed in the Preventive Basic Care Management (PBCM) program, improve parenting and prevent child behavioral problems? This randomized controlled clinical trial (RCT) compared the effectiveness of PBCM with a control condition.

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Objectives: To test the efficacy of a low-intensive lifestyle education program (DiAlert) for overweight first degree relatives of type 2 diabetes patients aimed at reducing diabetes risk.

Methods: Overweight first degree relatives of type 2 diabetes patients were randomly assigned to the DiAlert intervention (N=45) or control group who received leaflets (N=51). DiAlert consists of two group sessions and newsletters.

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Objective: Exploring determinants influencing vulnerable groups regarding (non-) participation in the Dutch two-stage cardiometabolic health check, comprising a health risk assessment (HRA) and prevention consultations (PCs) for high-risk individuals.

Methods: Qualitative study comprising 21 focus groups with non-Western (Surinamese, Turkish, Moroccan) immigrants aged 45-70, adult children from one of these descents, native Dutch with a lower socioeconomic status, and healthcare professionals working with these groups.

Results: Reasons for not completing the HRA included (flawed) risk perceptions, health negligence, (health) illiteracy, and language barriers.

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Background: Physical therapists play an important role in the promotion of physical activity (PA) and the effectiveness of PA interventions. However, little is known about the extent to which they implement PA interventions following the intervention protocol and about the factors influencing their implementation behaviors.

Objective: The study objective was to investigate physical therapists' implementation fidelity regarding PA interventions, including completeness and quality of delivery, and influencing factors with a Theoretical Domains Framework-based questionnaire.

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Background: People from Asian populations are generally shorter than other ethnic groups. It is unknown if current universal height references are suitable for affluent South Asian children in the Netherlands.

Aims: To develop height-for-age charts for contemporary South Asian children aged 0-20 years living in the Netherlands, to evaluate secular trends, and to compare the charts with current Asian Indian, Dutch and WHO references.

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Objective: To evaluate the association between risk perception and attendance in a diabetes prevention programme among South Asians with a high risk for diabetes.

Design: An observational study. We measured risk perception during the baseline interview with causal beliefs, perceived susceptibility and perceived controllability.

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Background: Despite the promising findings related to the efficacy of interventions aimed at promoting physical activity (PA) in primary health care (PHC), the translation of these interventions to PHC practice does not always happen as desired.

Purpose: To help understand why efficacious PHC-based PA interventions are not effectively translated to practice, this study systematically reviewed the literature on factors influencing PHC professionals' PA promotion practices.

Method: Literature searches were conducted in Web of Science, PubMed, and PsycINFO for peer-reviewed articles published in English from 1990 onwards.

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Background: The introduction of efficacious physical activity (PA) interventions in routine primary health care (PHC) is a complex process. Understanding factors influencing the process can enhance the development of successful introduction strategies.

Purpose: The aim of this qualitative study was to explore stakeholders' perceptions on factors influencing the introduction, i.

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Background: To be able to design effective strategies to improve healthcare professionals' implementation behaviors, a valid and reliable questionnaire is needed to assess potential implementation determinants. The present study describes the development of the Determinants of Implementation Behavior Questionnaire (DIBQ) and investigates the reliability and validity of this Theoretical Domains Framework (TDF)-based questionnaire.

Methods: The DIBQ was developed to measure the potential behavioral determinants of the 12-domain version of the TDF (Michie et al.

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Background: Asian populations have an increased risk of developing cardiometabolic disorders at a lower body mass index (BMI) than other ethnic groups. Therefore, lower adult BMI cut-offs to determine overweight and obesity are recommended to assess the associated health risks for Asian (23 and 27.5 kg/m(2) respectively) and Asian Indian (23, 25 kg/m(2)) populations.

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Background: South Asian babies born in developed countries are generally lighter than babies from other ethnic groups born in the same country. While the mean birth weight of Caucasian babies in the Netherlands has increased the past decades, it is unknown if the mean birth weight of South Asian babies born in the Netherlands has increased or if the prevalence of low birth weight (LBW) or small-for-gestational-age (SGA) has decreased.The aims of this study are: 1.

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Background: The introduction of efficacious physical activity interventions in primary health care is a complex process. Understanding factors influencing the process can enhance the development of effective introduction strategies. This Delphi study aimed to identify factors most relevant for the adoption, implementation, and continuation of physical activity interventions in primary health care by examining experts' opinions on the importance and changeability of factors previously identified as potentially relevant for the process.

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Aim: To study 1-year effectiveness of an intensive, culturally targeted lifestyle intervention in general practice for weight status and metabolic profile of South-Asians at risk of type 2 diabetes.

Methods: 536 South-Asians at risk of type 2 diabetes were randomized to an intervention (n = 283) or control (n = 253) group. The intervention, which was targeted culturally to the South-Asian population, consisted of individual lifestyle counselling, a family session, cooking classes, and supervised physical activity programme.

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In the Netherlands, excess body weight and obesity occur more commonly in certain ethnic minority groups. Diet plays an undeniable role in the development of obesity. Insight into the roles of diet and eating behaviour in the development of obesity among ethnic minorities is, however, limited.

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Objectives: Asians have a smaller muscle mass and a larger fat mass at the same body mass index (BMI) than most other ethnic groups. Due to a resulting higher cardiometabolic risk, the BMI cut-offs for overweight and obesity were lowered for adults. For Asian children universal criteria apply.

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Background: Preventive care traditionally aims to prevent diseases or injuries. For older people, different aims of prevention, such as maintenance of independence and wellbeing, are increasingly important.

Aim: To explore GPs' perspectives on preventive care for older people.

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Background: Prevalence of type 2 diabetes mellitus is increasing due to lifestyle changes, particularly affecting those genetically at risk. We developed DiAlert as a targeted group-based intervention aimed to promote intrinsic motivation and action planning for lifestyle changes and weight loss in first degree relatives of patients with type 2 diabetes mellitus.The main objective of the pilot of the DiAlert intervention was to assess fidelity, feasibility and acceptability prior to starting the randomized controlled trial.

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