Background and aims Osteoarthritis (OA) of the knee or hip is associated with limitations in activities of daily life. There are only a few long-term studies on how knee or hip OA affects the course of physical performance. The aim of this study was to investigate the effects of knee or hip OA on physical performance during a follow-up period of 10 years. Methods Participants in the Longitudinal Aging Study Amsterdam with self-reported hip or knee OA (N = 155) were prospectively followed for 10 years on 4 occasions from the onset of OA and compared to participants without OA (N = 1004). Physical performance was tested with walk, chair stand and balance tests. Scores for each test were summed to a total performance score (range 0–12), higher scores indicating better performance. Generalized estimating equations were used to analyze differences between participants with and without OA, unadjusted as well as adjusted for confounders. Results There was a significant interaction between OA and sex (P = 0.068). Both in men and women, total performance was lower for participants with OA, with greater differences in men. Chair stand and walking performance (P < 0.05), but not balance, were lower in participants with OA. After adjustment for confounders, these associations remained significant in men but not in women. Additional analyses correcting for follow-up duration and attrition showed lower performance scores for men and women with OA. Conclusions OA negatively affected physical performance 3–6 years after it was first reported. Performance in men with OA was more affected than in women.
Background. One of the stakeholders in tackling the rise and health consequences of overweight and obesity is the general practice physician (GP). GPs are in a good position to inform and give nutrition guidance to overweight patients. Objective. Assessment of working mechanism of determinants of the nutrition guidance practice: noticing patients’ overweight and guidance of treatment by GPs [linear analysis of structural relations (LISREL) path model] in a longitudinal study. Methods. This longitudinal study measured data in 1992, 1997 and 2007. The 1992 LISREL path model (Hiddink GJ, Hautvast J, vanWoerkumCMJ, Fieren CJ, vantHofMA. Nutrition guidance by primary-care physicians: LISREL analysis improves understanding. Prev Med 1997; 26: 29–36.) demonstrated that ‘noticing patients’ overweight and guidance of treatment’ was directly and indirectly influenced by predisposing factors, driving forces and perceived barriers. This article defines and discusses the path analysis of the 2007 data (compared with 1997). Results. This analysis shows both similarity and differences inworking mechanism of determinants of noticing patients’ overweight and guidance of treatment between 1997 and 2007. The backbone of themechanism with four predisposing factors is the similarity. The number of driving forces and of paths through intermediary factors to the dependent variable constitutes the difference. Conclusions. The backbone of the working mechanism of determinants of the nutrition guidance practice: noticing patients’ overweight and guidance of treatment by GPs was similar in 2007 and 1997. The influence of GPs task perception on noticing patients’ overweight and guidance of treatment considerably increased in 2007 compared to 1997. The longitudinal character of this article gives a strong practice-based evidence for weight management by GPs.
The influence of the built environment on travel behaviour and the role of intervening variables such as socio-demographics and travel-related attitudes have long been debated in the literature. To date, most empirical studies have applied cross-sectional designs to investigate their bidirectional relationships. However, these designs provide limited evidence for causality. This study represents one of the first attempts to employ a longitudinal design on these relationships. We applied cross lagged panel structural equation models to a two-wave longitudinal dataset to assess the directions and strengths of the relationships between the built environment, travel behaviour and travel-related attitudes. Results show that the residential built environment has a small but significant influence on car use and travel attitudes. In addition, the built environment influenced travel-related attitudes indicating that people tend to adjust their attitudes to their built environment. This provides some support for land use policies that aim to influence travel behaviour.
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In societies where physical activity levels are declining, stimulating sports participation in youth is vital. While sports offer numerous benefits, injuries in youth are at an all-time high with potential long-term consequences. Particularly, women football's popularity surge has led to a rise in knee injuries, notably anterior cruciate ligament (ACL) injuries, with severe long-term effects. Urgent societal attention is warranted, supported by media coverage and calls for action by professional players. This project aims to evaluate the potential of novel artificial intelligence-based technology to enhance player monitoring for injury risk, and to integrate these monitoring pathways into regular training practice. Its success may pave the way for broader applications across different sports and injuries. Implementation of results from lab-based research into practice is hindered by the lack of skills and technology needed to perform the required measurements. There is a critical need for non-invasive systems used during regular training practice and allowing longitudinal monitoring. Markerless motion capture technology has recently been developed and has created new potential for field-based data collection in sport settings. This technology eliminates the need for marker/sensor placement on the participant and can be employed on-site, capturing movement patterns during training. Since a common AI algorithm for data processing is used, minimal technical knowledge by the operator is required. The experienced PLAYSAFE consortium will exploit this technology to monitor 300 young female football players over the course of 1 season. The successful implementation of non-invasive monitoring of football players’ movement patterns during regular practice is the primary objective of this project. In addition, the study will generate key insights into risk factors associated with ACL injury. Through this approach, PLAYSAFE aims to reduce the burden of ACL injuries in female football players.
Studenten in het beroepsonderwijs leren op de werkplek om een goede beroepsuitoefenaar te worden. Beoordeling van het werkplekleren gebeurt vaak op de werkplek en door de werkplek. Dit promotieonderzoek wil in kaart brengen hoe werkplekopleiders de student beoordelen.Doel Het doel van dit promotieonderzoek is om het beoordelingsproces van werkplekopleiders in kaart te brengen en te analyseren. Door inzichten over dit proces te ontwikkelen en de huidige praktijk te analyseren willen we sterke en zwakke kanten van dit proces identificeren om zo bij te kunnen dragen aan de ondersteuning van werkplekopleiders. Implementatie Op basis van de resultaten van dit promotieonderzoek kunnen interventies ontwikkeld worden waarmee beoordelaars ondersteund kunnen worden in het beoordelen van het functioneren van studenten in de beroepspraktijk. Resultaten Ronde tafel-presentatie (2017). Beroepsbekwaamheid beoordelen: zicht krijgen op beslissingsprocessen van beoordelaars op de werkplek. Onderwijs Research Dagen 2017 Paperpresentatie (2017). Supervisor assessment of performance at the workplace in vocational education deconstructed. European Conference of Assessment in Medical Education 2017 Paperpresentatie (2018). Understanding how educators at the workplace reach judgements when assessing students’ professional performance. European Association for Research on Learning and Instruction – Special Interest Group 1 2018 Proefschrift (2023) met titel Understanding how workplace educators assess student performance (verdediging 30 juni 2023). Looptijd 01 september 2016 - 01 september 2020 Aanpak Dit promotieonderzoek betreft een samenwerking tussen de OU en het lectoraat Beroepsonderwijs. De promotor vanuit de OU is prof. dr. Elly de Bruijn (ook lector Beroepsonderwijs), en de co-promotor vanuit het lectoraat Beroepsonderwijs is dr. Liesbeth Baartman. Tijdens dit promotieonderzoek nemen we interviews af en doen we een literatuurreview om in beeld te brengen wat er al bekend is in theorie en praktijk. Daarna doen we een longitudinale case study om het beoordelingsproces van werkplekopleiders gedurende de stage in kaart te brengen.
