Developing Interview Questions to Estimate Workplace Exposure to Electric and Magnetic Fields
RATIONALE: Electric and magnetic fields may increase the risk of cancer. Developing interview questions that accurately estimate a person's exposure to electric and magnetic fields may help doctors learn about the long-term effects of workplace exposure.
PURPOSE: This clinical trial is developing interview questions that can be used in estimating workplace exposure to electric and magnetic fields.
Brain and Central Nervous System Tumors
Other: questionnaire administration
Procedure: study of high risk factors
|Official Title:||Assessment of Occupational EMF Exposure - Validation of Interview Procedures Used in Brain Tumor Study|
- Validation of an interview-based electric and magnetic field (EMF) exposure assessment algorithm
- Calibration of algorithm parameters
- Correlation between EMF exposure estimates from the algorithm with biologically based metrics measured by new instrumentation
|Study Start Date:||October 2005|
|Study Completion Date:||March 2007|
- Validate an interview-based electric and magnetic field exposure (EMF) assessment algorithm against measurements of the time-weighted average magnetic field magnitude used in previous epidemiologic studies.
- Calibrate the parameters in the algorithm in order to improve the exposure estimates.
- Correlate EMF exposure estimates from the algorithm with biologically based metrics measured by new instrumentation.
OUTLINE: Participants respond to questions during a 5- to 15-minute telephone interview concerning workplace exposure to electric and magnetic (EMF) fields. Data is collected during the interview using an exposure assessment algorithm designed to estimate EMF workplace exposure based on participants' responses. The interview-based estimates are then validated against actual field measurements of magnetic field exposure captured by Emdex multiwave monitors located at participating sites.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00340054
|United States, California|
|Menlo Park, California, United States, 94025|
|United States, Ohio|
|National Institute for Occupational Safety and Health|
|Cincinnati, Ohio, United States, 45226|
|Study Chair:||Joseph Coble, DSc||National Cancer Institute (NCI)|