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Showing 1-15 of 15 trials
NCT07261423
The goal of this clinical trial is to learn if adding Air Quality Index (AQI) information to asthma action plans works to improve asthma outcomes in children. It will also learn about children with asthma who report being more sensitive to outdoor air pollution. The main questions it aims to answer are: * Does adding either information about the EPA-AQI or commercial AQI improve asthma outcomes over time? * Are there changes in nasal gene expression in children with asthma who report they are more sensitive to outdoor air pollution? Researchers will compare EPA-AQI and the commercial-AQI groups to a control group to either AQI works to improve asthma. Participants will: * Receive standardized outdoor air pollution education and an asthma action plan * Provide nose and blood specimens * Have visits every 4 weeks for 48 weeks, 10 will be conducted by telephone calls and 3 visits will be in person.
NCT07237958
The goal of this study is to study the effect exposure to air pollution and its effect on development of dementia. Does the diesel exhaust change the function of the olfactory system? Have the exposures measurable effects on the sense of smell and cognitive ability? Forty people are exposed to diesel exhaust exhaust and filtered air. The exposures are blinded and in a randomized order. Both groups undergo biopsies of the olfactory epithelium in the nose under local anesthesia after the exposures and after performing cognitive test.
NCT02673775
The purpose of the study is to better understand the mechanisms of lung injury from ozone exposure. Subjects will participate in two exposure sessions: filtered air and 0.2 ppm ozone. Subjects will be asked to produce sputum through coughing after each exposure. The samples will be analyzed for macrophage activity.
NCT06708793
This project is a descriptive study designed to identify the exposure of infants who died of MIN to ambient air pollutants, and to measure pesticide concentrations in biological matrices (hair, serum, LCS) within a sample from the OMIN registry. French national registry of STUDY of Sudden Unexpected Infant Death.
NCT06592235
Climate change is characterized by global temperature increase, melting of glaciers and increasing temperature of ocean waters. Increase in greenhouse gases such as nitrogen and carbon dioxide negatively affects air and water quality. Extreme events such as extreme heat waves, floods and hurricanes are events seen with climate change. It is known that climate change and air pollution have negative effects on public health. Its adverse effects are often seen in individuals with rhinosinusitis, asthma and chronic obstructive pulmonary disease. Air pollution is expected to increase due to the ongoing economic growth and population growth worldwide, resulting in more respiratory diseases and disease burden. This study aims to assess the awareness level of individuals with chronic lung disease on climate change, heat waves, air pollution and their interaction with physical activity and anxiety and depression levels, and to better understand the experiences of patients and learn their perspectives. Within the scope of the study, it is planned to provide patients brief information on this subject and receive feedback about this information.
NCT06506890
This is a CONTROLLED PROSPECTIVE COHORT study of a long-term care facility. At the start of the study a dedicated section A of the facility ventilation system will have routine HVAC filters of the same dimensions installed, while section B of the same facility ventilation system will have C-POLAR (cationic polymeric coated) HVAC filters installed. There will be continuous Indoor Air Quality monitors (PM 2.5, CO2, VOC, Radon, Temp, and RH) installed at different vent locations throughout the long-term care facility for the duration of the study. Air samples with an Airport MD8 BAMS machine will be taken once a week at various vent locations at the long-term care facility.
NCT06491290
The goal of this observational study is to evaluate the impact of primary air pollutants and weather parameters on emergency department (ED) visits in the metropolitan area of Florence.
NCT05843370
The goal of this observational study is to compare the effects of air pollution exposure and nutrition between neighborhoods with high and low social vulnerability scores. The main questions this study aims to answer are: * Does living in a neighborhood with high or low vulnerability influence the response of the heart, lungs, and immune system to air pollution. * Does nutritional status alter the association between air pollution exposure and changes in the heart, lungs, and immune system. Participants (age 25-70 years) that live in neighborhoods ranked high or low on the Social Vulnerability Index (SVI) will take part in 3 visits. Each visit involves the following: * Measurements of heart activity, lung function, and blood to measure changes that may be caused by air pollution. * Questionnaires about the types of food eaten and activities that may modify exposure to air pollution. * Estimation of air pollution exposure using a study iPhone. Participants will carry a study iPhone with them for 24 hours at each visit. The study iPhone runs an application (app) that estimates the amount of air pollution each participant is exposed to. * Wearing silicone wristbands for a week before each study visit. Silicone wristbands absorb air pollutants and are later measured see the types and amounts of chemicals participants are exposed to.
NCT03744871
Fine particulate matter \< 2.5 microns (PM2.5) air pollution is a leading global risk factor for cardiovascular morbidity and mortality. PM2.5 presents a serious ongoing public health threat to patients living in highly-polluted countries (ex: China, India) where air quality is projected to remain extremely poor (far exceeding World Health Organization Air Quality Guidelines) for the foreseeable future. This study reviews the benefits of personal level intervention (wearing N95 respirator) over long term, to prevent clinical events among patients with cardiovascular disease.
NCT03301519
This is a family based genotype-phenotype study designed to assess genetic and environmental influences on obesity, insulin resistance and beta cell function in the context of gestational diabetes.
NCT04029129
This randomized trial assessed the effect of modifying building envelop and level of air filtration on blood pressure over two hour exposure sessions.
NCT05423665
In this project there are 2 time points during the pregnancy included, namely at 21 weeks and 30 weeks of gestation, to measure the predictive values of FGR, strain and strain rate. The fetal growth parameters will be collected at the same time points, to define the growth (differences) throughout gestation of both fetuses. A maternal blood sample will be taken at 21 weeks of gestation to identify the level of exposure to air pollution (black carbon) and the level of biochemical markers of placental dysfunction. Doppler ultrasounds will be used for antenatal identification of placenta insufficiency. At birth, umbilical cord blood and the placenta will be collected. The placenta will be examined, to identify morphological findings which are associated with FGR. The umbilical cord blood and placental biopsy will be used for the level of exposure to air pollution and the level of oxidative stress. One to three days after birth, neonatal strain and strain rate will be measured to define postnatal cardiac remodeling as well as the neonatal blood pressure as cardiovascular risk factor.
NCT04908917
Fine particulate matter \<2.5 μm (PM2.5) air pollution is the fifth leading risk factor for global mortality. Mitigating the clinically significant blood pressure (BP) elevation from air pollution by reducing PM2.5 exposure will likely contribute to the reduction in cardiovascular disease-related mortality. Twin epidemics of air pollution and high BP converge in underserved urban communities (i.e., Detroit) and warrant immediate attention. Prior studies with short duration (a few days) showed indoor portable air cleaners (PACs) are a novel approach to reduce the health burden of both high BP and PM2.5. Trials over several weeks employing remote technologies with a large sample size of patients residing in their own homes in vulnerable urban communities are needed to demonstrate if the BP-reduction from PAC usage is sustainable in real-world settings. The investigators' specific aims are to 1) determine if compared to sham, active PAC use during 3 weeks can provide sustained reductions in home BP levels by reducing personal-level PM2.5 air pollution exposures in patients with mild high BP residing in vulnerable disadvantaged communities across Detroit and 2) explore clinical markers (e.g., age, sex, body mass index) that predict BP-responses to PAC intervention to better target at-risk populations in larger-scale trials and future real-world clinical settings. A randomized, double-blind, sham-controlled parallel limb trial of overnight bedroom PAC use versus sham with 200 Detroit community individuals with mild high BP will be conducted. Continuous bedroom PM2.5 levels and home BP will be measured throughout 28 days. PAC will be used in the bedroom before bedtime on the 7th day continuously for 21 days. The reduction of systolic BP (SBP) will be calculated for both the intervention and control groups and the significance will be compared using mixed-effects modeling with repeated measurements of SBP as the dependent variable and group (active vs sham PAC use) as the independent variable with a fixed-effect. Linear multiple regression modeling with SBP as the dependent variable and participant-level characteristics including body mass index, waist circumference, race, ethnicity, or sex as predictors will be explored. This study is expected to demonstrate a significant sustainable reduction in home SBP for active PAC vs sham use in this population with mildly high BP.
NCT02821650
The present study documents a randomized controlled study investigating the efficacy of improved cookstove on the personal exposure to air pollution and the respiratory health of women and children in an Indian slum. The improved cookstove is based on co-creation of a low-smoke chulha with local communities in order to support adaption and sustained uptake. The study is conducted in notified and non-notified slums in Bangalore, India. The study design is be a 1:1 randomised controlled intervention trial. Outcomes include change in lung function (FEV1/FVC), incidence of pneumonia, change in personal PM2.5 and CO exposure, incidence of respiratory symptoms (cough, phlegm, wheeze and shortness of breath), prevalence of other related symptoms (headache and burning eyes), change in behaviour and adoption of the stove.
NCT03079843
Healthy volunteers will be exposed to ambient air near a roadway under the conditions of with and without a facemask and their responses will be evaluated.