Cohort Study

Psoriatic arthritis (PsA) is a chronic inflammatory rheumatic disease, belonging to the wide spectrum of spondyloarthritis, but with the particularity to be associated with personal psoriasis or familial psoriasis. PsA can be a very disabling disease through progressive and irreversible joint damage. Long-term functional prognosis of patients with PsA is correlated with the presence and severity of the radiographic joint lesions of the disease. However, the proportion of patients who will develop those peripheral joint damages is not yet known and less over the factors which are associated/involved in such an aggressive pattern of the disease. Early identification of this subgroup of patients is particularly important for determining early "intensive" treatment, strict management with a Treat To Target approach, and identification of new treatments with a stronger structural effect. The main objective of this prospective 10 years cohort is to describe the 5 years structural (radiographic) severity of recent Psoriatic arthritis (PsA)with recent peripheral arthritis.Some of the secondary objectives are to describe the 10 years structural severity within those patients, and to determine the predictive factors of those 5 and 10 years radiographic lesions (genetic, environmental, clinic, therapeutic factors). APACHE will provide a unique longitudinal standardized database concerning patients with PsA with very recent peripheral arthritis. Research projects which will based on those collected data should allow to identify the mechanisms of aggressive joint damage, to highlight mew treatments targets, to better describe the burden of the disease, to test previous or develop new assessments tolls, to develop early diagnostic criteria

To evaluate the efficacy and safety of biological agents in patients with allergic bronchopulmonary aspergillosis.

The study aims to construct an early warning model for Osteoporotic Vertebral Compression Fracture (OVCF) by integrating TCM syndrome patterns with modern risk factors. This is a multi-center cohort study on OVCF integrated with disease and syndrome differentiation in Traditional Chinese Medicine (TCM).

The goal of this observational study is to learn about the causes, severity, and long-term effects of respiratory tract infections (RTIs) in young children from birth to five years of age in Colombia and Panamá. The main questions it aims to answer are: How often do respiratory infections occur in children under two years old, and which viruses or bacteria cause them? Why do some children develop more severe infections than others? Do early infections or vaccinations change how the immune system responds to future illnesses? How do viruses and bacteria interact in the respiratory tract to influence disease severity and long-term respiratory health? Researchers will follow newborns from birth until age five to understand how respiratory infections develop and affect children's health over time. Participants will not receive any experimental treatment. Families who join the study will: Be contacted twice a week through a phone app or phone calls to check for symptoms of respiratory infection. Attend in-person visits if their child becomes ill and every six months for routine follow-up. Provide nasal and blood samples during illness episodes so researchers can identify the viruses or bacteria causing infection and study how the immune system responds. This study began in May 2024 and is being conducted in Cali, Colombia, and Panamá City, Panamá. The research team plans to continue to include participants and continue active follow-up until the children reach five years of age. The information collected will help scientists and health professionals understand how different pathogens cause respiratory infections, what factors increase the risk of severe illness, and how early infections may influence long-term lung health. The study's findings will support future efforts to prevent and treat respiratory diseases in young children.

The prevalence of severe chronic venous insufficiency (CVI) is significant in the growing octogenarian population. While radiofrequency ablation (RFA) is a standard minimally invasive treatment, robust data on its outcomes and safety profiles specifically in patients aged 80 years and older remain scarce. This study aims to evaluate the risks and benefits of RFA in this specific, high-risk demographic.This prospective, single-arm, single-center cohort study will enroll 50 patients (initial target sample size) aged ≥80 years with CVI classified as CEAP C3 to C6 and with confirmed great or small saphenous vein reflux. All participants will undergo endovenous RFA under tumescent local anesthesia. The primary outcomes are: 1) the great/small saphenous vein occlusion rate at 6 months, assessed by duplex ultrasonography, and 2) the change in disease-specific quality of life from baseline to 6 months, measured by the Aberdeen Varicose Vein Questionnaire (AVVQ). Secondary outcomes include occlusion rates at 1 and 3 months; complication rates (e.g., deep vein thrombosis, skin burns, paresthesia) within 30 days; and changes in the Venous Clinical Severity Score (VCSS) and the 12-Item Short Form Health Survey (SF-12) at predefined intervals over 6 months.This study is designed to demonstrate a high technical success rate (occlusion rate \>95% at 6 months) and a statistically significant improvement in AVVQ and VCSS scores at 6 months post-procedure. The collected data will provide a detailed profile of complication rates, characterizing the safety of RFA in this very elderly cohort.This study will provide crucial, prospective evidence regarding the efficacy and safety of RFA for treating CVI in octogenarians. The findings are expected to guide clinical decision-making and inform treatment guidelines for this vulnerable and expanding patient population.

This population-based cohort study on disease prevention and health promotion was established in northwest China, leveraging data from routine annual health examinations. Initiated in January 2016, the cohort enrolled nearly all residents aged 18 years and older who were registered at community healthcare centers. The program was developed to provide a comprehensive framework for disease prevention and community health promotion, with the aim of producing population-based evidence across a broad spectrum of diseases in the general population. At baseline, data were collected on participant demographics, medical and family histories, disability status, living environment, and blood biochemical parameters. Follow-up information is primarily obtained through chronic disease management programs, annual health examinations, and electrical health records. Cause-specific mortality is ascertained from local death registration systems. Biological specimens, questionnaire data, and electrical health records are systematically archived in the Biobank and Big Data Center of the People's Hospital of Xinjiang Uygur Autonomous Region.

Antiphospholipid syndrome (APS) is a thrombotic disease requiring prolonged anticoagulation. Direct oral anticoagulants (DOACs) are indicated as 1st-line therapy in venous thrombosis, compared with VKAs, due to their easier handling and lower bleeding risk for equivalent efficacy. In APS, VKAs are still the reference treatment. However, DOACs are generally introduced in the acute phase of venous, before the diagnosis of APS. VKA have the disadvantage of numerous food and drug interactions, and therefore require close monitoring of INR, at least once a month. Because they are easier to use than VKAs, and the risk of bleeding is lower, patients are often reluctant to switch from DOACs to VKA. Studies have shown that APS patients with high thrombotic risk (positivity of all three antiphospholipid tests, history of arterial or small vessels thrombosis or cardiac valve damage) have an increased thrombotic risk during DOACs vs. VKA treatment. Since 2020, the ISTH guidelines have suggested avoiding DOACs in high-risk APS, but suggest continuing theim in other patients if they were introduced for venous thrombosis and if follow-up on DOACs is reassuring. In the case of high-risk APS patients, the relay is therefore systematic. For non-high-risk patients (the majority), there are no data to justify systematic switch. Given the quality-of-life advantages of DOACs over VKAs, patients are not always in favor of changing their anticoagulant therapy, especially if they have been on it for many years with good tolerability. For these reasons, a number of patients with non-high-risk APS remain on DOACs. Nevertheless, the limited data available on the efficacy of DOACs in non-high-risk patients are of low level of evidence and contradictory. In 2020, a literature review of non-high-risk SAPL patients treated with DOACs reported that 8.6% of them experienced thrombotic recurrence within 12 months, with no possible comparison with VKAs. A recent retrospective study with 96 patients reported that 15.4% of patients treated with DOACs had a recurrence, compared to 5.3% on VKAs. However, this difference was not statistically significant (p=0.15) due to a clear lack of power. The objective is to determine the frequency of thrombotic recurrences and to compare it according to the type of oral treatment, anti-Xa versus VKA, in non-high-risk APS, through a cohort study with prospective follow-up. The patient's usual antithrombotic treatment, DOAC and VKA, will be continued unchanged.

Liver diseases represent a significant public health problem, with a high prevalence and a growing incidence worldwide, and a significant impact on global morbidity and mortality, causing approximately 2 million deaths annually. Deaths are largely attributable to complications of cirrhosis and hepatocellular carcinoma. The most common causes of cirrhosis worldwide are related to viral hepatitis, alcohol, and non-alcoholic fatty liver disease caused by poor dietary habits. Regarding the hepatitis B virus (HBV), the vaccination program, together with the improvement of socioeconomic conditions and greater public awareness, have progressively reduced the incidence and prevalence of this viral disease. Chronic hepatitis related to the hepatitis C virus (HCV), after an increase in the 1980s and 1990s, is showing a decreasing trend, particularly among younger age groups. While other studies have focused on liver diseases of metabolic origin, the most recent epidemiological data concerning the Italian population were collected in the late 1990s. Since a decade has now passed, it was thought that it might be interesting to collect new data on the prevalence pattern of liver diseases, especially in southern Italy, particularly in a municipality equally geographically distant from both the coast and the inland. Therefore, this observational study aims to analyze the evolution of liver diseases through the recall of a cohort of patients already identified in the Mediterranean area. The cohort is composed of individuals residing in the municipality of Putignano (BA) who have already undergone evaluation of liver function, comorbidities and dietary habits, in addition to adding genetic information through genome-wide association (GWAS) analyses, useful for identifying associations between genetic variants and specific phenotypic characteristics

This study is a prospective multicenter cohort study that primarily evaluates the impact of traditional Chinese medicine treatment on pulmonary nodules

The goal of this observational cohort study is to learn about the etiology, natural course, therapeutic effect and outcome of recurrent acute pancreatitis patients. The main question it aims to answer is: Does endoscopic intervention, surgery or conservative treatment reduce the recurrence of acute pancreatitis? What are the risk factors affecting the recurrence of acute pancreatitis? Patients will be closely followed and clinical information will be recorded.

The cohort study on disease prevention and health promotion in the northeastern region of Taiwan is a trial dedicated to large-scale generational research in northeastern Taiwan beginning in the August of 2013. The program aims to develop a comprehensive and integrated approach to disease prevention and community health. The researcher's cohort organizes healthcare outreaches for participants over the age of 20 residing in 64 administrative areas in Keelung city and new Taipei city. The researcher's sessions include a comprehensive health examination, health-related questionnaires, and disease awareness seminars. Biological samples, questionnaire information, and medical data obtained from researcher's participants are stored in researcher's core laboratory. Depersonalized data and samples are shared with partnering trials approved by the Chang Gung Memorial Hospital Institutional review board. The investigators are currently partnered with 18 clinical trials spanning across multiple disciplines such as urology, hepatology, metabolism, physical therapy, and psychology.