There are about 28871 clinical studies being (or have been) conducted in Canada. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
Schizophrenia is a chronic debilitating psychotic disorder. Identifying persons with "clinical high-risk" (CHR) symptoms, which are like those of schizophrenia but less severe, and providing psychiatric care to these individuals has been shown to help prevent psychosis. Current medications used for CHR symptoms, however, are associated with substantial side effect burden. Therefore, practice guidelines do not recommend current medications as routine treatment for the CHR state, and there is a need to identify new treatments for this condition. Research suggests that abnormal brain oxidative stress may contribute to schizophrenia, offering a potential novel treatment target in the CHR state. Oxidative stress is an excess of free radicals, which are generated from normal metabolism and environmental exposures, and can damage cells. Antioxidants in the body normally neutralize free radicals. Antioxidant deficiency could result in excess oxidative stress that damages brain cells, leading to schizophrenia. Recent studies suggest that N-acetylcysteine (NAC), a precursor of the most abundant brain antioxidant, glutathione, may be a safe, well-tolerated treatment for schizophrenia. In light of this, NAC may also reduce symptoms and brain abnormalities in CHR patients.
This a stepped wedged cluster RCT with two intervention arms--Treatment As Usual (TAU) and an Integrated Care Pathway (ICP). Eligible participants are between the ages of 13 and 18, who present to community mental health agencies with depressive symptoms as the primary concern. The primary objective is to establish the clinical effectiveness of the ICP intervention in the community setting relative to TAU, with respect to reducing evaluator-rated depressive symptoms. The secondary objectives are to explore changes in clinician-rated function and caregiver-rated symptoms for youth receiving the ICP intervention relative to TAU. The third objective is to explore the implementation effectiveness of the ICP intervention, namely investigating: feasibility, fidelity, cost and acceptability. Edited on March 7th, 2024: This is a quasi-experimental, multi-site cluster controlled clinical trial design with two intervention arms--Treatment As Usual (TAU) and an Integrated Care Pathway (ICP). Eligible participants are between the ages of 13 and 18, who present to community mental health agencies with depressive symptoms as the primary concern. The primary objective is to establish the clinical effectiveness of the ICP intervention in the community setting relative to TAU, with respect to reducing evaluator-rated depressive symptoms. The secondary objectives are to explore changes in clinician-rated function and caregiver-rated symptoms for youth receiving the ICP intervention relative to TAU. The third objective is to explore the implementation effectiveness of the ICP intervention in the community setting, namely investigating: feasibility, fidelity, cost and acceptability.
Post-surgical biliary leaks are relatively common after surgeries associated with hepatobiliary health. Left untreated, biliary leaks can lead to significant morbidity. Biliary leaks are most often successfully managed endoscopically, by way of performing an ERCP (endoscopic retrograde cholangio-pancreatography) procedure. These procedures help manage the bile leak by decreasing pressure at the opening of the common bile duct and promoting bile flow into the small bowel (rather than out the leak) via stent insertion. Guidelines published by the American Society for Gastrointestinal Endoscopy (ASGE) report that stents are generally placed for 4 to 6 weeks and recommend longer intervals for more complex leaks. However, formal recommendations concerning the modality of biliary stent removal do not exist. One option is performing a repeat ERCP when removing the stent. While comprehensive, this exposes the patient to additional radiation, and requires additional fluoroscopy resources and/or technicians. Furthermore, ERCPs are less available, especially in smaller centers, and are costly. A second option is a gastroscopy with simple stent removal has, given the low probability of requiring repeat intervention, the relatively low procedural cost, and the relatively favorable adverse event profile, and easier accessibility compared to ERCP procedures. A simple, safe and reliable prediction rule was developed retrospectively to identify patients in whom biliary stent removal via gastroscopy could be safely performed, as opposed to repeat ERCP. A positive result using the rule requires satisfaction of four non-invasive clinical markers: (1) a normal post-surgical serum alkaline phosphatase value, (2) bile leak 'type C' at initial ERCP (a small or absent leak with no other biliary pathology), (3) a bile leak caused by laparoscopic cholecystectomy, and (4) a time between initial and follow-up endoscopy of 4 to 8 weeks. Validating this prediction rule prospectively could have implications on patient safety by decreasing ERCP-related adverse events, and could also have important implications with regard to health resource utilization.
Choledocholithiasis (stone(s) in the common bile duct) is common. Untreated or missed, choledocholithiasis has high morbidity and mortality. Endoscopic retrograde cholangio-pancreatography (ERCP) is recognized as the first-line modality for management. While effective, ERCP is associated with adverse events. Thus, the selection of patients for ERCP should be accompanied by a high pre-test suspicion of choledocholithiasis. Choledocholithiasis is suspected based on clinical, biochemical and radiographic findings. The most relied-upon strategy for risk stratification of choledocholithiasis is based on guidelines from The American Society for Gastrointestinal Endoscopy (ASGE). In it, clinical predictors are defined as "very strong", "strong" or "moderate", and the presence of one or more of these is meant to suggest "high" or "intermediate" probability of choledocholithiasis. A knowledge gap exists in the performance characteristics of intermediate-probability criteria, where overall accuracy is <50% from limited data. Patients in this group are recommended to a) undergo endoscopic ultrasound (EUS) or magnetic resonance cholangio-pancreatography (MRCP), b) undergo cholecystectomy with intra-operative cholangiography (IOC), or c) proceed directly to ERCP. At centres where EUS and MRCP are readily available, these are preferred options, as they are least invasive and sensitive; however, they are often unavailable. Thus, in clinical practice, a high proportion of intermediate-risk patients ultimately proceed directly to ERCP, where likelihood of benefit is only moderate, while procedural risk remains. The role of liver enzyme changes has not been evaluated; however, dynamic changes may offer another method for evaluating patients at intermediate risk of CBD stones that is safe and available. Incorporation of dynamic liver enzymes may improve the test-performance characteristics of the existing framework.
The objective of this study is to evaluate (1) the effect of a non-restrictive satiating intervention on appetite control, body weight loss and maintenance; and (2) determine whether switching to a non-restrictive satiating intervention following a conventional restrictive intervention can prevent increases in appetite and attenuate body weight regain usually observed after weight loss in men and women living with obesity. This is an 18-month, randomized, controlled, parallel weight loss [Phase 1 (P1): 6 months] and maintenance trial [Phase 2 (P2): 12 months] with three groups (n=234 men and women): (1) non-restrictive, satiating intervention (P1) followed by a continuation of this intervention (P2); (2) conventional restrictive intervention (-500 kcal/d) (P1) followed by a non-restrictive satiating intervention (P2); (3) control group that follows minimal healthy guidelines (P1) followed by recommended weight maintenance strategies (P2). All groups will be controlled for physical activity and sleep patterns. The non-restrictive satiating intervention will include guidelines and recipes to prepare highly satiating meals that will be low in energy density and glycemic index and high in protein, polyunsaturated fats, vitamins and minerals (e.g. calcium), and certain constituents of spices (e.g. capsaicin). Measurements at baseline (week 0), after P1 and P2 will include the following primary outcomes: appetite control, weight loss and maintenance; and secondary outcomes: body composition, physiological, psycho and neurobehavioural and health-related variables. Follow-ups will be done by a dietitian every 2 weeks during P1 and once a month during P2.
This is a multicenter, single arm study of Sofosbuvir/Velpatasvir (SOF/VEL) for treatment of chronic hepatitis C infection during pregnancy. Treatment will be initiated during the second or third trimester in approximately 100 pregnant people. Maternal participants will take one SOF/VEL tablet once daily for 12 weeks (84 days) and followed until 12 weeks after treatment completion (postpartum). Infants will be followed from birth until one year of age. The primary objectives are to evaluate the sustained virologic response 12 weeks after completion of SOF/VEL treatment (SVR12) in participants treated during pregnancy and to evaluate impact of antenatal treatment with SOF/VEL on the gestational age at delivery.
Cognitive and physical function impairments are common in patients diagnosed with Chronic Obstructive Pulmonary Disease (COPD). Research has shown that cognitive and physical exercise training may be a beneficial strategy to improve physical and cognitive performance in COPD patients; however, interventions combining physical and cognitive training have not been evaluated in this population. The objectives of this research are i) to evaluate the feasibility of an 8-week home-based cognitive-physical training program in COPD patients; and ii) to derive preliminary estimates on intervention efficacy with cognitive-physical training on dual-task performance, physical function, activities of daily living, and health-related quality of life. Related to our research objectives, we hypothesize that i) it will be feasible to safely recruit COPD patients into a home-based cognitive physical training program with 75% adherence and high satisfaction ratings with the prescribed training; and that ii) the combination of cognitive and physical training will be superior to physical training alone for improving dual-task and cognitive performance, physical function, activities of daily living, and health-related quality of life.
Immune checkpoint inhibitors (ICI) are among the most promising approaches to fighting cancer. However, a substantial percentage of patients experience off-target adverse effects in the form of mild to severe inflammation in different organs, commonly called immune-related adverse events (irAEs). irAEs can lead to treatment discontinuation, or can be life-threatening in extreme cases. The causes of irAEs are largely unknown and there are no reliable predictive biomarkers. The Montreal Immune-Related Adverse Events (MIRAE) study collects clinical information and biospecimens (blood, tissue, stool) from cancer patients treated with ICI to facilitate research on the identification of predictive biomarkers of irAEs, their causes, and the design of effective management strategies.
Hidradenitis suppurativa (HS) is a chronic and often painful inflammatory skin disease which includes the forming of lumps, abscesses and scars in areas of the skin such as under the breasts, under armpits, inner thighs, groin and buttocks. Despite the clinical benefit anti-tumor necrosis factor (TNF) therapy offers to patients with HS, there remains a significant unmet medical need for patients who fail to achieve adequate benefit with anti-TNF therapy. This study will compare lutikizumab (ABT-981) versus placebo for the treatment of adult participants with moderate to severe HS who have failed anti-TNF therapy. Lutikizumab (ABT-981) is an investigational drug being developed for the treatment of HS. In the Main Study, participants will be put in 1 of 4 groups, called treatment arms. There is a 1 in 4 chance that participants will be assigned to placebo. Around 160 adult participants with moderate to severe HS who have failed anti-TNF therapy will be enrolled in the study at approximately 50 sites worldwide. In the Sub-study, participants will be put in 1 of 2 groups, called treatment arms. Both arms will receive treatment at different dosing intervals. Around 40 adult participants with moderate to severe HS who are naïve to biologic therapy will be enrolled in the study at certain sites. In the Main Study, participants will receive subcutaneous injections of lutikizumab (ABT-981) or placebo every week for 16 weeks. In the Sub-study, participants will receive subcutaneous injections of lutikizumab (ABT-981) every week for the first 15 weeks, then either every week or every other week for 36 weeks. There may be higher treatment burden for participants in this trial compared to their standard of care. Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires and diaries.
The purpose of this Phase 2/3, randomized, multisite, open-label, dose confirmation, and expansion study is to evaluate the safety, and efficacy of zilovertamab vedotin (ZV) in combination with standard of care options for the treatment of rrDLBCL. This study will be divided into 2 parts: Dose Confirmation (Part 1) and Efficacy Expansion (Part 2) and will enroll participants who are at least 18 years of age with rrDLBCL. The hypotheses are: ZV in combination with rituximab, gemcitabine, and oxaliplatin (R-GemOx) is superior to R-GemOx with respect to progression-free survival (PFS) per Lugano response criteria by blinded independent review committee (BICR); and that ZV in combination with bendamustine rituximab (BR) is superior to BR with respect to PFS per Lugano response criteria by BICR. With protocol amendment 4 (effective: 04-April-2024), enrollment in Cohort B (study arms Bendamustine Rituximab [BR] and ZV + BR) is discontinued. No efficacy outcome analysis and hypothesis testing will be conducted for Cohort B.