Home Air in Agriculture: Pediatric Intervention Trial
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 71
- 试验地点
- 2
- 主要终点
- Change in ammonia (NH3) concentration
研究概览
简要总结
This study seeks to reduce exposure to asthmagens in the homes of a community of Latino children residing in an area of intense agricultural production in Eastern Washington by testing the effectiveness of an intervention (high efficiency particulate air filter- HEPA portable room air cleaners) plus asthma education to reduce indoor measures of particulate matter, ammonia, improve clinically relevant measures of asthma health, and reduce biomarkers of inflammation.
详细描述
Over the course of five years, this project's specific aims are as follows:
- Build on a well-established community based participatory research program to engage community partners in the design, implementation and evaluation of this asthma intervention study.
- Conduct a year-long intervention study with longitudinal measurement of key asthmagen exposures and health outcome indicators with minimal participant burden.
- Develop and characterize evaluation metrics for the process, impact and outcomes of this project in achievement of the aims.
- Promote sustainable public health action via positive and transparent communications about the project to participants, local stakeholders, and state level policy makers through broad-based community outreach.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 6 Years 至 12 Years（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Eligibility criteria include male and female, poorly controlled asthma, likely to stay in the area over the course of the study, having only one residence, no smokers in the household and residential proximity to dairy operations/crop production (<400 meters) determined by the telephone screening questionnaire.
排除标准
- •Prior participation in the Asthma Home Visiting Program, not from the northern third of the lower Yakima Valley, well controlled asthma, unlikely to stay in the are over the course of the study, smokers in the household, no residential proximity to dairy operations or crop production, having more than one residence and inability to communicate over the phone.
结局指标
主要结局
Change in ammonia (NH3) concentration
时间窗: 1 year (study period)
Indoor air sampling for NH3 collected over a 14-day period. Ogawa passive sampler (Ogawa USA, Pompano Beach, Fl, USA) is left open for 14 days. Measurements collected at beginning and at 1 year after enrollment.
Asthma exacerbation
时间窗: One year (study period)
Reviewed participant medical records for receipt of prescription for a course of oral corticosteroid.
Clinical utilization
时间窗: One year (study period)
Caregivers were asked if child had a scheduled or unscheduled ("urgent") clinical visit with a doctor or health care provider, emergency department, or overnight hospitalization for asthma symptoms. Number and types of visits are reported.
Asthma Control Test
时间窗: At study enrollment
ACT score using the ACT questionnaire
Inflammatory markers of asthma: Fractional exhaled nitric oxide
时间窗: At study enrollment
Portable NIOX VERO (Aerocrine Inc, Stockholm, Sweden) for direct measurement of fractional exhaled nitric oxide.
Lung function
时间窗: At study enrollment
Measured lung fuction using EasyOne spirometer (NDD Technologies, Andover, MA). Minimum of three exhalations with acceptable starts, complete exhalation, and no coughs until two exhalations with acceptable repeatability was achieved.
Change in particulate matter 2.5 (PM2.5) concentration
时间窗: 1 year (study period)
Indoor air sampling for PM2.5 collected over a 14-day period. MicroPEM (RTI International, Research Triangle Park, NC, USA) is turn on and left on for 14 days. Measurements collected at beginning and at 1 year after enrollment.
Inflammatory markers of asthma: Urinary leukotriene
时间窗: 1 year (study period)
Measured urinary leukotriene concentration and specific gravity in child urine sample. Measurements collected at enrollment, mid-study (4-6 months after enrollment), and end of study (1 year after enrollment)
次要结局
未报告次要终点
研究者
Catherine Karr
Professor, School of Medicine: Pediatrics
University of Washington