Developing Interview Questions to Estimate Workplace Exposure to Electric and Magnetic Fields

Study Overview
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Brief Summary
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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.

Detailed Description
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OBJECTIVES: 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.

Official Title
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Assessment of Occupational EMF Exposure - Validation of Interview Procedures Used in Brain Tumor Study

Conditions
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Brain and Central Nervous System Tumors

Intervention / Treatment
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* Other: questionnaire administration
* Procedure: study of high risk factors


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Meets 1 of the following occupation criteria: Three occupations that primarily work in offices at Lawrence Livermore National Laboratories (LLNL) Three occupations that do nonelectric manual work (e.g., machinists and laborers) at LLNL PATIENT CHARACTERISTICS: Not specified PRIOR CONCURRENT THERAPY: Not specified

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: questionnaire administration|nan|
|Procedure: study of high risk factors|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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 |  |  | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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brain tumor