View clinical trials related to Adults.
Filter by:The purpose of this study is to evaluate the clinical outcome of resin-bonded fixed dental prostheses (RBFDPs) pretreated with nanostructured alumina coating (NAC). The study adopts a prospective, randomized, controlled, double-blind design contrasting the use of NAC to air-borne particle abrasion (APA) (control) as a surface pretreatment method of zirconia RBFDPs used for replacing missing central or lateral incisors. The primary outcome evaluated is the retention/survival of the zirconia RBFDPs pretreated with APA and NAC.
Rationale: It is now recognized that diet plays a critical role in the etiology and management of chronic diseases such as type-2 diabetes, obesity and cardiovascular diseases. Evidence shows an increasing prevalence of type-2 diabetes as well as obesity, whereby large consumptions of carbohydrate foods is one of the leading contribution to these diseases. Food structure and texture can be modified to control oral processing behaviour, which would have subsequent impact on total energy intake and glycaemic response through altering the food breakdown path. Whilst it has been demonstrated that foods which are eaten at a faster rate leads to more food consumed ad-libitum and therefore higher energy intake, they are also eaten at fewer chews per bite, resulting in larger food particle sizes and hence slower digestion. Therefore it is important to understand the overall net effect of the opposing outcomes of food texture and oral processing behavior, bolus properties and glycaemic response, and identify the key factors which has the biggest influence on glycaemic response. The findings from this study can be used as guidelines on meal planning and making better informed choices between foods which are of the same composition/nutrition but with different health outcomes. Study Aims: The aim of this study is to understand how food texture and saliva characteristics influences oral processing behavior, bolus characteristics and postprandial glycaemic response. Study Design: Randomised crossover design where participants receive 2 treatments (i.e. 2 test meals) over 2 test sessions. Test sessions will include bolus characterisation of foods where participants chew and expectorate test foods (5g each) based on a fixed chew protocol. Study Population: Up to 40 healthy males aged 21-50 years with BMI between 18-25 kg/m2 Intervention: For test session 1 and 2, participants will receive 2 treatments (i.e. 2 test meals) in randomised order over 2 sessions. The test meals contain 50g carbohydrate load of different textures. Participants will be video recorded while consuming the test meals to derive oral processing behaviour (bites, chews, time food spent in mouth). Blood samples will be collected at baseline and post consumption (5, 10, 15, 30, 45, 60, 90, 120 minutes) to measure glycaemic responses to the test meals. For test session 3, participants will be asked to follow a fixed chew protocol to chew and expectorate 3 test foods while being video recorded. Similarly, oral processing behaviours will be analysed from the recorded videos. The spat out food samples (i.e. bolus samples) will be analysed for saliva uptake and bolus particle size indicating extent of food breakdown.
Patients with haematologic malignancies are increasingly treated by Oral Anticancer Medications (OAMs), increasing the challenge of ensuring optimal adherence to treatment. However, except for Chronic Myelogenous Leukemia (CML) or Acute Lymphoid Leukemia (ALL), the extent of non-adherence has rarely been investigated in an outpatient setting. In Belgium, the only available data suffers from critical underrepresentation of patients from minority diverse population. In the context of increasing migration, the identification of differences in access and drug use that may lead to health disparities is crucial. Based on a sequential mixed method study design, our objectives are to measure adherence to OAMs in two subgroups of non-migrants and migrants with various haematological malignancies, to identify the associated risk factors and to explore the representations that come into play with regards to illness and adherence behaviors. Essentially, the MADESIO protocol will contribute to assess whether and why patients with migrant backgrounds are a risk group regarding adherence to OAMs.
Rationale: Oral processing behaviours (i.e. eating rate, bite size, chews per bite) play an important role in the onset of satiation and satiety and laboratory studies have shown that people who eat quickly consume more energy during an ad libitum meal. Therefore, one possible approach to control the energy intake is to encourage eating behaviour that slow the rate of calorie intake of the meal. Numerous studies that use external cues and prompts to change the eating rate (e.g. utensil, devices) have shown to produce clinically meaningful results. However, the long-term efficacy of these external manipulation to eating rate remains unclear and have difficulties in adherence. Texture led changes to oral processing behaviours therefore offer an exciting opportunity to adapt an individual's response to structure properties of the food being consumed in a way that maintains the associated eating experience and satiety from food intake. However, no studies to date have investigated how differences food processing influence food texture characteristics and oral processing behaviour and the subsequent impact on energy intake for commonly consumed meals. The proposed study will explore the impact of food texture and oral processing characteristics on energy intake for the minimally-processed and ultra-processed foods or meals, to explore the impact of food processing on texture, oral processing and energy intakes. Objective: The objectives of the study are to characterise the differences in sensory perception, and oral processing behaviours (i.e. eating rate, bite size, chew per bite, oral exposure time etc.) of foods and meals that differ in their degree of processing (Part 1), and to further investigate how texture-based differences in oral processing behaviour influence ad-libitum energy intake (Part 2). This study is also aimed to see how is the texture-based differences in oral processing behaviour modified by degree of food processing (i.e. un-, minimally-processed, processed and ultra-processed foods) (Part 2). Study design: Part 1) Randomised non-blinded feeding trial where participants taste up to 48 food items over 3 test sessions; Part 2) 2x2 randomised crossover design where participants receive 4 treatments (i.e. 4 test meals) over 4 test sessions Study population: Healthy females and males (n=30 for Part 1; n=50 for Part 2) aged 21-50 years with BMI between 18-25 kg/m2 Intervention: Part 1) Participants will taste and evaluate up to 48 food items over 3 sessions in randomised order. Session 1 involves tasting of up to 16 food items and computer task to rate and evaluate their perception and health behaviour. Sessions 2-4 involve evaluation of sensory characteristics, video-recordings of participants eating, and wrist worn accelerometer to track wrist movement while tasting up to 48 food items.
Methamphetamine misuse has become a growing concern in Alberta, creating a burden on the health care system. Further, individuals who use methamphetamine in Alberta exhibit significant difficulty remaining in treatment. These troubling patterns necessitate the provision of evidence-based practices (EBPs)-those grounded in empirical evidence-to ensure the best possible care and outcomes for those struggling with this addiction. Within the field of substance use (SU), contingency management (CM) is an extensively studied evidence-based treatment (EBT) for addictive disorders. CM is an intervention that provides incentives to encourage positive behavioural change. Compared to standard care (treatment-as-usual (TAU)), CM has resulted in improvements in abstinence, attendance, adherence, retention, and quality of life. The efficacy of CM has largely been investigated in the context of reinforcing abstinence, though the literature suggests that CM which reinforces attendance may be as effective. Research from the US has examined the cost-effectiveness of CM and found that although CM costs more, it was associated with greater abstinence, treatment completion, and substance-absent urine compared to TAU. Despite the promising literature, the uptake of CM in Canada is limited making it difficult to understand whether this EBT is equally efficacious as compared to the US. This study will implement and evaluate the efficacy of virtually delivered attendance-based CM in outpatient addiction treatment in Alberta. Participants (N=544) will be individuals seeking treatment for methamphetamine use (n=304) and individuals seeking treatment for substance use issues other than methamphetamine use (n=240). It is hypothesized that compared to participants in TAU, participants in CM will evidence: (1) greater retention, (2) greater attendance, (3) greater abstinence from methamphetamine and less methamphetamine use, (4) greater abstinence from other SU and less SU, and (5) greater improvement in quality of life over the intervention and follow-up periods. Exploratory aims include understanding how: outcomes differ based remote versus in-person delivery of CM; outcomes differ between participants who use methamphetamine and participants who use substances other than methamphetamine; the costs of CM differ from TAU; CM changes health service use.
This research has the following specific objectives: 1. To elucidate how within-person variation in lifestyle factors affect fluctuations in blood glucose concentrations in individuals at high risk of diabetes.This study will elucidate how variation in food intakes, physical activity, and psychological stress affect variation in blood glucose concentrations throughout the day. These results can identify potential targets for interventions to reduce excessive fluctuations in blood glucose concentrations. 2. To describe to what extent the response of individuals to a standardized meal tolerance test can predict real-life variation in blood glucose concentrations. This study will evaluate how much variation in glucose concentrations under real-life conditions can be explained by an individual's response to a standardized mixed meal tolerance test. This will provide insight into the relative importance of variation in dietary and other lifestyle behaviours on an individual's predisposition to higher blood glucose responses. 3. To elucidate the role of oral processing behaviour and saliva properties on blood glucose concentrations. This study will elucidate whether variation in oral processing behaviours (e.g. number of chews taken, oro-sensory exposure time) and saliva properties (a-amylase activity, flow rate) predicts variation in blood glucose concentrations across individuals. 4. To assess whether research collecting multiple repeated measures of food intake, activity, and stress is feasible in large-scale epidemiological studies.This study will provide important insights into the feasibility over the long-run to collect multiple repeated data points on lifestyle behaviours through mobile phone applications and 24-hour glucose and physical activity monitoring in large scale studies in the Singapore population.
Evaluate the prognostic value of different methods (Osmometry / clinical-biological score) compared to the occurrence of capillary leak shock during dengue fever.
This study will collect vocalization data from healthy adults during regular daily activity.
The human foot is a complex structure, which serves functions such as support and mobility. These functions are accomplished through the deformation of the arch, which is controlled by intrinsic and extrinsic foot muscles. The intrinsic muscles have an important role in dynamic stabilization of the foot due to their structurally short force levers and small diameters. There are many studies reporting that foot intrinsic muscle weakness is directly related to pathologies such as structural or functional toe deformities, pes planus, hallux valgus, plantar fasciitis .Therefore it is essential to evaluate the strength of these muscles in an objective and reliable way.
The co-ordination and control of body segments are integral in providing and maintaining postural stability. It is widely accepted that attentional demands for postural control are placed upon the individual, but these vary according to the nature of the task, the age of the individual and their postural stability. It is thought that divided attention (a technique whereby two tasks are performed at the same time whilst rapidly switching attention between the two tasks) is commonly used when multi-tasking. Divided attention may have important clinical implications to falls risk, in that older adults that experience falls have increased difficulty in switching attention between tasks such as walking and talking. Dual tasking paradigms which present postural and cognitive tasks are often used to test attentional demands for posture control and interference between the two tasks. At present it is not known what impact balance confidence, sleep, activity levels or cognitive ability impact on a person's ability to multi-task when performing complex walking tasks that reflect the complexity of mobilising in real-life situations.