Cockroach Allergen Reduction by Extermination Alone in Low-Income, Urban Homes: A Randomized Control Trial
The most important risk factor for asthma in inner-city homes may be exposure to cockroach allergen. In a previous study, the researchers reported that extermination alone, without resident education or professional cleaning, reduced allergen levels in inner-city homes. This result contradicted earlier findings by other scientists. This study seeks to confirm the researchers' earlier results, and to determine how intensive an effective extermination must be.
The study will last one year and include 60 infested, multi-unit rental homes in North Carolina, divided into three groups. In the Treatment-1 group, researchers from North Carolina State University will set insecticide bait in initial and follow-up visits, as the highest standard for treatment. In the Treatment-2 group, one of five commercial pest-control companies will be randomly assigned to treat each home according to a 12-month, pre-paid contract. The third group will be a control group that receives no extermination treatment. In all homes, researchers will periodically survey the residents, monitor cockroach numbers, and monitor allergen levels in dust samples. If this study is successful, it will be used to plan future asthma prevention trials.
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: No masking
Primary Purpose: Treatment
|Official Title:||Cockroach Allergen Reduction by Extermination Alone in Low-Income, Urban Homes-A Randomized Control Trial|
|Study Start Date:||August 12, 2004|
|Study Completion Date:||February 12, 2007|
|Primary Completion Date:||February 12, 2007 (Final data collection date for primary outcome measure)|
Please refer to this study by its ClinicalTrials.gov identifier: NCT00341445
|United States, North Carolina|
|NIEHS, Research Triangle Park|
|Research Triangle Park, North Carolina, United States, 27709|
|Principal Investigator:||Darryl C Zeldin, M.D.||National Institute of Environmental Health Sciences (NIEHS)|