Clinical trials

Metabolic dysfunction-associated steatotic liver disease (MASLD) (aka non-alcoholic fatty liver disease), commonly occurring in individuals with obesity and type 2 diabetes can lead to liver inflammation/ fibrosis. MASLD results from fat being disproportionately deposited in the liver. The goal of this mechanistic study is to investigate metabolic response in patients aged 20 to 80 years with non-alcoholic fatty liver disease, after niacin (vitamin B3) treatment. The main questions it aims to answer are: * Does Niacin lower the fat deposition in the liver? * Does Niacin raise White Adipose Tissue storage of dietary fatty acids? Researchers will compare Niacin to a placebo (a look-alike substance that contains no drug) to compare the metabolic response. Duration of study per participant: Up to 28 weeks

The Canadian Critical Care Comparative Effectiveness Platform(e) d'Évaluation Clinique Comparée en soins Critiques (CEPEC) is an international multi-centered randomized adaptive platform clinical trial. CEPEC will evaluate supportive care interventions that are used routinely in intensive care units throughout the world.

This study looks at whether therapeutic climbing - indoor climbing activities guided by therapists - can help children with Developmental Coordination Disorder (DCD). DCD is a condition where children have difficulty with motor skills and participation in everyday activities, and sometimes confidence in physical activities. The climbing program is based on a problem-solving approach called CO-OP (Cognitive Orientation to daily Occupational Performance), in which children learn strategies to achieve goals.

Breast cancer predominates among cancer diagnoses in Canadian women. It accounts for around 25% of new cases and contributes to 13% of all cancer-related deaths. In 2020, almost 27,400 Canadian women were diagnosed with breast cancer and 5,000 of them died from it. Mammography is still the preferred method for screening for breast cancer. Although progress has been made over the years, mammography does have its drawbacks. These include physical discomfort for patients, exposure to X-rays and reduced effectiveness in dense breasts. The study team is therefore interested in developing a new breast cancer detection method, the BRAVE method. The BRAVE method, short for "BRA-based Visco-Elastography", uses the high contrast of elastic stiffness in malignant breast tumors to detect possible cancer cases without the need for X-rays or breast compression. The first phase, carried out on a small scale pilot study, aimed to assess the method's ability to distinguish a breast with no abnormalities from one with confirmed cancer. The second phase (current phase), carried out on a larger scale, aims to confirm the sensitivity and specificity of the method in detecting malignant lesions, i.e. to determine whether the method is capable of distinguishing between several types of breast masses.

One third of individuals aged \>60 years will be diagnosed with at least one renal cyst following abdominal imaging. These cystic lesions are categorized according to the Bosniak classification which categorizes cysts according to their degree of complexity and risk of malignancy. Growing evidence suggests that a significant proportion of Bosniak III and IV cysts are benign and that the malignant ones present low metastatic potential. Since renal surgery carries substantial morbidity (20%) and potential mortality (0.5%), active surveillance has gained attention as a potential tradeoff to surgery to overcome overtreatment. Therefore, prospective studies of long-term follow-up are needed to confirm the oncologic safety of this strategy for patients with Bosniak III/IV cysts. This is an multicenter prospective observational longitudinal study. The main objective is to compare the 5-year follow-up cancer-specific survival between the active surveillance and the surgical groups.

This is a mixed-method study aimed at gathering new evidence on reproductive health among female service members in the Canadian Armed Forces (CAF). Reproductive health includes four primary domains: contraception; undesired reproductive outcomes (including unintended pregnancy, adverse pregnancy outcomes, and infertility); assisted reproductive care; and pelvic floor dysfunctions. Additional factors that may influence reproductive outcomes will also be explored, including gynecological health (including but not limited to menstrual health, menopause, breast injury, sexually transmitted and blood-borne infections) as well as physical and psychological health (including but not limited to repetitive strain injuries, depression, and post-traumatic stress disorder). Evidence gathered on reproductive health issues will include, but not limited to, the lived experiences (occurrence), associated risk factors, access to care, including barriers and facilitators, service utilization, and career-related impacts among actively serving members and Veterans of the CAF. These will inform the development of recommendations and support services aimed at improving reproductive health care within the CAF. This project is divided into 3 convergent parts: Part 1: An online pan-Canadian survey that will achieve a minimum total sample of 1067 participants. Part 2: Semi-structured individual interviews (open-ended questions) will be conducted with female CAF members and Veterans who have experienced at least one reproductive health issues. A total of 30 participants are estimated to be required to achieve data saturation across the four primary domains. Part 3: Semi-structured group discussion (open-ended questions) will be conducted with healthcare providers, who have experience with treating female reproductive health issues in CAF members, as well as stakeholders and policymakers involved in supporting female members of the CAF/Veterans. A total of 24 healthcare providers/stakeholders/policymakers will form 3 group discussion (8 participants/group). For all 3 parts, efforts in recruitment will be made to ensure representation across CAF elements, minority groups, and native language (French and English).

The RECAP project will evaluate the clinical and metabolic effects of adding exogenous ketones to antipsychotic (AP) treatment in young adults with a first episode of psychosis (FEP). FEP requires early intervention to limit relapse, chronic symptoms, cognitive decline, and reduced life expectancy. Symptoms include positive (hallucinations, delusions), negative (amotivation, anhedonia), cognitive (attention, working memory), and mood disturbances. Standard care combines second- or third-generation APs with psychosocial interventions. However, many patients have persistent symptoms despite optimal treatment. Psychosis is linked to increased cardiovascular and obesity risk. APs can cause insulin resistance, type 2 diabetes, and dyslipidemia, but some metabolic abnormalities-both systemic and cerebral-may precede AP use, suggesting an intrinsic metabolic dysfunction. Brain energy metabolism is often impaired, with altered insulin signaling, glucose transport, and ATP production. Glucose hypometabolism in the prefrontal cortex correlates with negative and cognitive symptoms, even before medication, resembling patterns in Alzheimer's, bipolar disorder, and depression. Ketones, especially beta-hydroxybutyrate, provide an alternative to glucose for brain energy. Ketogenic diets have therapeutic potential but are difficult to maintain, particularly in psychiatric populations. Exogenous ketones, such as medium-chain triglycerides (MCTs), can raise circulating ketone levels without major dietary changes. MCT supplementation has been shown to improve brain metabolism and cognition in other conditions, but no studies have tested it in FEP. This uncontrolled, prospective pilot study will provide 15 g of MCT oil twice daily for 12 weeks, in addition to participants' usual diet and treatment. The primary objective is to assess changes in circulating ketone levels and metabolic markers (glucose, insulin, HbA1c). Secondary objectives include feasibility, acceptability, effects on real-time glucose metabolism (via continuous glucose monitoring), clinical symptoms (negative, cognitive), quality of life, other metabolic biomarkers, and general systemic markers. This is the first study to test exogenous ketones in FEP. It will assess safety, tolerability, and potential metabolic and clinical benefits, offering preliminary mechanistic insights and guiding future integrative mental health strategies.

Chronic vulvar pain is a highly prevalent and debilitating condition affecting up to 16% of women. The most common subtype of vulvar pain, provoked vestibulodynia (PVD), is characterized by a sharp pain at the entry of the vagina in response to pressure or attempted vaginal penetration. Women with PVD not only present with psychological distress and significant disruption in all aspects of sexual function, but they are also confronted with limited effective treatment options. Dry needling (DN) could fill this therapeutic gap. Similar to acupuncture, this approach involves the insertion of fine needles into the tissues. However, its mechanisms of action are quite different. DN specifically targets muscle tension/stiffness, which has been shown to play a key role in PVD. After designing a DN treatment protocol tailored to the affected muscles in PVD, our randomized pilot study confirmed that our state-of-the-art DN treatment protocol is feasible and acceptable for treating PVD and the promising findings obtained provide support for conducting the proposed large-scale study. The proposed multicenter randomized controlled trial aims to establish the efficacy of DN for reducing pain in women with PVD. Women will be randomized to receive either sham or real DN for 8 weekly sessions. Validated outcome measures will be assessed at baseline, post-treatment and at the 6-month follow-up. The current proposal addresses the urgent need to develop novel treatment options for women with PVD. If proven effective, DN could be proposed as a first-line low-risk treatment.

Exercise is well-known to improve skeletal muscle energy metabolism and is an established intervention to improve muscle insulin sensitivity and to counter the development of type 2 diabetes (T2D). However, given the 24h rhythmicity in substrate metabolism previously observed in healthy, lean men and the lack of such rhythmicity in men with insulin-resistance, the investigator hypothesize that appropriate timing of exercise training can maximize the metabolic health effects of exercise. Indeed, a preliminary study in humans revealed that afternoon high-intensity interval training (HIIT) exercise was more effective than morning exercise in improving 24h blood glucose levels in men with T2D. Another recent study in mice showed that the time of day is a critical factor in augmenting the beneficial effects of exercise on the skeletal muscle metabolome as well as on whole-body energy homeostasis. However, human studies that specifically target the impact of timing of exercise training on glucose homeostasis and metabolic health are scarce and the potential underlying mechanisms largely unknown. The overarching goals of this project is to improve 24-hour rhythmicity of metabolism in men and women with prediabtes by appropriate timing of exercise and to assess its effect on metabolic health and immune response. Acute and prolonged exercise interventions timed in the morning vs late afternoon will be carried out in individuals with prediabetes to determine whether acute exercise in the afternoon and prolonged exercise training in the afternoon can improve peripheral insulin sensitivity, compared to exercise in the morning, and positively affect adipose tissue dietary fatty acid storage and partitioning of dietary fatty acids in skeletal muscles.

Type 2 Diabetes Mellitus (T2DM) is a widespread health condition characterized by impaired ability of the body to maintain glucose homeostasis. This impairment often leads to secondary complications, including heart disease, high blood pressure, and poor quality of life. While exercise and healthy eating are effective strategies in managing and preventing T2DM, data shows that long-term adherence to these methods are poor - especially among elderly, individuals with obesity and/or with physical limitations. This clinical study explores cold exposure with shivering as a novel strategy to improve blood sugar control and heart health. In earlier research, spending time in mildly cold environments (around 15-17°C) for a few hours a day improved insulin sensitivity of T2DM patients. Interestingly, these benefits only occurred when the cold caused mild shivering. In a recent 10-day cold acclimation study with overt shivering for minimally 1 hour/day, we observed improved glucose tolerance in participants with overweight/obesity, as well as improved fasting lipid profiles. These results indicate that when accompanied with sufficient level of muscle activation, repeated exposure to cold can beneficially affect both glucose and lipid levels - both of which are impaired in people with T2DM. In this study, we hypothesise that a 10-day cold acclimation with shivering will improve the (peripheral) insulin sensitivity of patients with T2DM, accompanied by enhanced skeletal muscle FA uptake and oxidation as assessed via the 11C palmitate uptake.

Following a stroke, persistent residual muscle weakness in the upper limb (UL) drastically impacts the individuals' quality of life and level of independence. Training interventions are recommended to promote UL motor recovery, and recent studies have shown that training must be tailored to each individual's recovery potential to maximise training gains. Complementary to training interventions, non-invasive brain stimulation devices (NIBS) can help support the provision of post-stroke care by modulating brain excitability and enhancing recovery. Among NIBS, cranial nerve non-invasive neuromodulation (CN-NINM) is gaining increasing attention in rehabilitation since it can directly and non-invasively stimulate the tongue's cranial nerves. The impulses generated can then reach the motor cortex, induce neuroplastic changes and support recovery. Promising results in various neurological populations have been observed, but in stroke, the efficacy of CN-NINM at improving arm motor recovery and brain plasticity is yet to be determined. This is what the present project intends to address, using a stratified randomized controlled trial, where participants in the chronic phase of a stroke will take part in a 4-week individualized training program of their affected UL in combination with real or sham CN-NINM. Before and after the intervention, participants will undergo clinical and neurophysiological evaluations to thoroughly evaluate CN-NINM-induced changes in UL motor function and associated neuroplastic changes. The proposed study will allow an in-depth evaluation of the effects of CN-NINM for an eventual implementation in clinics and at home to support optimal post-stroke recovery.

Asthma is a common inflammatory respiratory disease affecting 11% of Canadians, but its diagnosis remains challenging, leading to delays in treatment or overtreatment. Spirometry with a reversibility test and bronchial provocation testing (BPT), considered the gold standard, are the reference diagnostic methods. However, access to BPT is limited as it is performed in hospital settings. Type 2 inflammation biomarkers, the fractional exhaled nitric oxide (FeNO) and blood eosinophils (EOS), represent a potential alternative. In addition to their prognostic and theragnostic value, these markers predict a good response to inhaled corticosteroids in individuals aged ≥ 6 years with asthma. However, their use remains restricted to pulmonologists in specialized clinics and is not recommended as a diagnostic tool in Quebec. Despite studies demonstrating their diagnostic value in specialized settings, these tests remain underexplored in primary care and insufficiently studied in children under 12 years. The objective of ou study is to evaluate the relevance and performance of FeNO and blood eosinophils in the diagnosis of asthma in children referred in primary care with non-diagnostic spirometry.

The objective of this observational study is to assess the relevance of inflammometry (based on the measurement of fractional exhaled nitric oxide (FeNO) and blood eosinophil count (BEC)) as a tool for prioritizing respiratory diagnostic tests. The study will evaluate the role of inflammometry (FeNO and BEC) in prioritizing diagnostic respiratory tests. It will include patients aged six and older with suspected asthma, referred by non-pulmonologists for diagnostic asthma testing (spirometry or methacholine challenge test) at three hospital centers: Sherbrooke University Hospital Center (CHUS), Sainte-Justine University Hospital Center (CHU Sainte-Justine), and the Montreal Children's Hospital. The hypothesis is that using inflammometry as a prioritization tool would reduce diagnostic delays for high-risk patients with elevated biomarkers. This study could help shorten wait times, relieve congestion in diagnostic testing queues, and improve the diagnostic pathway. Additionally, it would enhance the interpretation of pulmonary function test results by incorporating inflammometry findings, leading to better patient stratification. Patients referred from primary care will undergo pulmonary function testing (spirometry ± methacholine challenge) and, as part of the study: FeNO measurement using a portable device Blood test for eosinophil count Questionnaire on asthma control and quality of life, completed at the visit and at follow-ups at 4, 8, and 12 months

Frailty describes the overall health of a person. Inpatients with cardiovascular problems have a higher risk for frailty - or the sick are more likely to get sicker - causing longer hospital stays, hospital readmission, and death. Females are particularly vulnerable to these problems, generally displaying higher frailty levels than males. In hospital, patients spend almost all their time in bed, and this lack of movement worsens cardiovascular and musculoskeletal health, sometimes lengthening patients' hospital stay and priming them for another cardiovascular event. Prolonged sedentary time may be more detrimental on frailty among females than males. The proposed pilot project will test if an in-hospital General Medicine mobilization program reduces frailty (measure of overall health) in male and female inpatients with cardiovascular disease. A Kinesiologist will provide daily check-ins and promote daily movement (e.g., standing more, resistance bands, physical activity promotion, etc.). The investigators expect both males and females will lower their frailty levels, but given their higher frailty levels in general and because females are typically less active than males, the investigators expect the intervention's effects to be greatest among females. Sixty patients (30 females) will be recruited. Patients with a major heart problem, projected to be in-hospital for at least 3-days, and can independently provide consent. Frailty will be measured using a validated questionnaire. Participants will also be equipped with activity monitors for 24h/d continuous wear to measure amount of time spent stepping, sitting, and lying. Hospital records will be used for length of stay and readmissions. The investigators will compare the outcomes (activity and frailty) between males and females to determine if the intervention impacted each sex differently. This work will guide improved care plans to decrease frailty and improve health outcomes in both male and female patients with heart problems.

Frailty describes the variability in aging and explains why two people of the same chronological age may look very different. Higher frailty leads to poor quality of life, disability, and death. Hospitalized patients living with frailty have a higher risk for functional decline, new impairments in activities of daily living, a longer hospital stay, hospital readmission, and death. A previous study from our team has reported that 60% of inpatients have more difficulty with 1+ basic activity of daily living (i.e., eating, getting out of bed, using the toilet, etc.) after hospitalization compared to pre-admission, with 1-in-4 patients having difficulty with 3+ basic tasks. Patients with few health deficits can recover to their pre-admission level, but those with higher frailty levels cannot, priming them for readmissions. Physical activity and reducing time spent sitting or lying postures prevent and improve frailty. Older patients who walk at least once/day outside their room during hospitalization have \~1.7 days shorter length of hospital stay compared with those who stayed in their room. Although multiple barriers exist to promoting upright time in a hospital, strategies that help address patients' excessive time spent in bed are often not implemented but could attenuate the development of frailty in the hospital. Few exercise interventions in hospital studies have considered frailty. The investigators have conducted a clinical trial within the Halifax Infirmary (Nova Scotia Health) that focused on mobilizing patients (average age: \~75 years) via regular visits by a Kinesiologist and observed that the intervention groups reduced their frailty level from preadmission and admission versus discharge. While preliminary findings from this model were promising, its reach was limited to acute geriatric care and dependent upon researchers to conduct the intervention. At the Georges-L. Dumont hospital, a patient mobilization program has been introduced in General and Internal Medicine (floor 4C) that embedded Kinesiologists within care to visit patients daily. Preliminary findings indicate that patients and staff are enjoying the program via self-report questionnaire. However, evaluations of the program's effectiveness in changing objectively measured activity and frailty levels and whether multiple patient visits would be more effective (e.g., refining the program) are unclear. The investigators propose to evaluate the effectiveness of the existing patient mobilization program and if more patient contact improves outcomes. Our study integrates activity monitoring technology and frailty assessments to help patients leave the hospital healthier and decrease the risk of readmission. Study Objectives: The proposed study will test the hypothesis that, compared to usual care (Kinesiology visit once/day), patients who receive multiple check-ins will, 1) increase their step counts and upright time, 2) decrease their frailty level, and 3) have a less length of stay and less readmission rates.

Physicians' interventions to promote the improvement of lifestyle habits have been shown to be effective. However, such interventions remain underutilized due to barriers such as lack of time, confidence, and compensation. Group medical visits (GMVs) can help overcome several of these barriers and effectively improve clinical indicators as well as patients' quality of life. GMVs could also reduce pressure on the healthcare system by improving access to primary care through a more efficient use of resources. The literature suggests that GMVs can be effective in improving access to care and reducing disease complications for patients with several conditions and risk factors, but they have not been assessed specifically among patients with dyslipidemia, which is at the origin of most cases of cardiovascular diseases. In this context, GMVs will be implemented among 144 patients with dyslipidemia. The objective for this project is to evaluate implementation of GMVs. The implementation evaluation will follow the RE-AIM framework. These steps will position the research team to develop more complex and large-scale studies in lifestyle medicine. In the meantime, the project will contribute to improve access to primary care for the prevention of cardiovascular diseases.

Canadians spend most of their day in sedentary postures (i.e., sitting, lying, reclining). While the beneficial impacts of physical activity on the heart are well-established, less is known about the consequences during time spent in sedentary postures. Currently, we know that spending time in a bout of uninterrupted sitting disrupts blood pressure regulation. However, it is unknown if there are any 'carry over' effects following uninterrupted sitting bouts (i.e., over the next 24-hours). The release of chemicals from arteries controls how stiff or relaxed they are and is important for controlling blood pressure. This is especially true for arteries directly impacted by sitting (e.g., the popliteal artery behind the knee) and that send blood to the brain (e.g., the carotid artery). We have also established that endothelial-derived hyperpolarizing factors (EDHF, chemicals that relax the artery) are important for the relaxation of the artery the popliteal artery. However, we do not know if the effects of EDHFs on this artery are decreased during or after a bout of uninterrupted sitting. A bout of prolonged sitting also causes blood pressure and fluctuations in blood pressure to increase. Importantly, we reported that fluctuations in blood pressure caused by sitting are higher in young males versus females, but average blood pressure was higher among females. These findings suggest that sitting exerts sex differences in the control of blood pressure. Importantly, these effects were only demonstrated during the 2-hour bout of sitting. As such, it is unknown whether blood pressure is negatively impacted after prolonged sitting. The proposed study will determine the impact of EDHFs on blood pressure regulation following a 2-hour bout of prolonged sitting among a group of healthy males and females. Continuous heart rate (via electrocardiogram) and blood pressure (via finger cuff), as well as blood flow from the common carotid artery (in the neck), middle cerebral artery (in the brain) and popliteal artery (behind the knee) will be measured before and after sitting (via ultrasound). The ability of the popliteal artery to relax will be assessed using ultrasound following the release of a pressure cuff. Finally, 24-hour blood pressure and heart rate will be recorded after sitting using a monitor worn for 24-hours. The role of EDHFs will be investigated by comparing 1) baseline blood flow and blood pressure responses (no sitting), 2) blood pressure responses following a 2-hour bout of sitting, and 3) the blood pressure responses following a 2-hour bout of sitting while suppressing the release of EDHFs (via fluconazole ingestion).

Postoperative pain following total knee arthroplasty (TKA) is often difficult to manage, particularly with the increasing use of outpatient surgery where patients recover at home. This study aims to evaluate whether wearing a knee extension brace for the first 72 hours after surgery can reduce pain and improve recovery. This pilot randomized controlled trial will compare two groups of patients undergoing primary unilateral TKA: one group will wear an extension brace continuously for 72 hours after surgery, while the control group will follow standard care with early mobilization. Participants will be followed for up to 12 months. The primary objective of this pilot study is to assess the feasibility of conducting a larger trial, including recruitment rates, adherence to the intervention, follow-up completion, safety, and acceptability. Clinical outcomes will also be explored, including pain at 2 and 6 weeks after surgery (measured using a visual analog scale), knee function, range of motion, opioid consumption, complications, healthcare use, and quality of life. The study hypothesizes that short-term immobilization of the knee in full extension will reduce postoperative pain and may improve early recovery outcomes. Findings from this pilot study will inform the design of a larger definitive trial and may contribute to improving postoperative care and pain management after knee replacement surgery.

This study tests whether an asthma medication called dupilumab can help people achieve complete asthma control (called "remission") when given earlier in their disease, before asthma becomes severe. Currently, most people with asthma only receive advanced treatments like biologics after their condition has worsened significantly and caused lung damage. This study explores whether treating high-risk patients earlier could prevent asthma attacks and lung function decline, potentially achieving remission before permanent damage occurs. The study is looking for adults aged 18-79 with moderate asthma who have had at least one asthma attack requiring steroid pills in the past 2 years, use medium or high-dose inhaled steroids regularly, have high levels of inflammation markers in their blood and breath tests, but don't yet meet criteria for severe asthma requiring biologic therapy. Participants receive either dupilumab or placebo injections every 2 weeks for one year, alongside their regular asthma medications. They attend clinic visits every 3 months for breathing tests, questionnaires, and safety monitoring. Neither participants nor doctors know who receives the real medication until the study ends. The goal is to learn whether early treatment with dupilumab helps more people achieve complete asthma control compared to standard care alone, potentially changing how asthma is treated from "waiting until severe" to "preventing severe disease." The study runs in Canada, the United Kingdom, and Australia, involving 150 participants

The present protocol aims to understand and establish whether there is a causal link between adipose tissue metabolic remodeling and Type 2 Diabetes (T2D) remission after bariatric surgery. All participants will have a bariatric surgery, divided in 2 groups: with or without T2D.

Lipoprotein lipase (LPL) is an enzyme that plays an important role in removing triglycerides (TG) (molecules that transport dietary fat) from the blood. Patients with LPL deficiency (LPLD) display during their whole life very high plasma TG levels often associated with episodes of postprandial abdominal pain, malaise, blurred vision, dizziness (hyperchylomicronemia syndrome) that may lead to recurrent pancreatitis episodes. Because of their very slow clearance in blood of their chylomicron-TG, these patients need to severely restrict their dietary fat intake to avoid these complications. Fortunately, novel treatments are being developed to circumvent LPL deficiency (LPLD) metabolic effect on chylomicron-TG clearance. However, there is no data on how LPLD affect organ-specific dietary fatty acid metabolism nor how the novel therapeutic agents may change this metabolism. For example, it is currently not understood how subjects with LPLD store their DFA into adipose tissues and whether they are able to use DFA as a fuel to sustain their cardiac metabolism, as healthy individuals do. This study aims to better understand theses two questions.

The purpose of this study is to evaluate the efficacy and acceptability of the French-Canadian version of ER compared to standard care in reducing postoperative pain and improving recovery outcomes at 6-week and 3-month follow-ups after elective orthopedic surgery.

Very few studies have investigated TAE as a treatment for goiter with compressive symptoms. What is the efficacy and safety of TAE for the treatment of compressive goiters in a population ineligible for or refusing standard therapy? This is a prospective interventional cohort study that will allow us to standardize imaging by improving quality data collection and fellow-up to assess the efficacy of TAE for compressive symptoms of nodular goiters. Not only to corroborate current emerging results but clearly define the expected results for this technique.

The main goals of this project are to support the research training of undergraduate medical students at the University de Sherbrooke and promote planning of health services a better knowledge of the prevalence, social, and geographic distribution of public health issues in several regions in Quebec. To meet the objectives of the project, a population-based prospective study linked to several regions in Quebec public health surveys is proposed. Monitoring and data collection will be provided by 3rd year undergraduate medical students at University de Sherbrooke through telephone interviews. The research themes will be proposed by various researchers affiliated with the University de Sherbrooke. They will be selected yearly by an internal scientific committee and included in the questionnaires administered by the students.

The goal of this randomized controlled trial is to learn if an outdoor science education intervention can improve primary school students' learning and well-being when compared to an indoor classroom-based science education intervention. The main questions it aims to answer are: * Will students who engage in outdoor science learning produce higher-quality observations of living organisms than students who receive instruction exclusively in an indoor, classroom-based context, when both groups are invited to make observations in an unfamiliar natural environment? * Does an outdoor education intervention embedded within the science curriculum contribute to children's connection to nature, eco-anxiety and stress? Participants will: * Receive a science education intervention 2h/week for a total of 5 weeks, either indoors or outdoors * Answer questionnaires before and after the intervention * Participate in a field day-trip after the intervention where they will be asked to observe living organisms.