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

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

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT00340054

Enrollment

108

Registered

2006-06-21

Start date

2005-10-31

Completion date

2007-03-31

Last updated

2012-03-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Brain and Central Nervous System Tumors

Keywords

brain tumor

Brief summary

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

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.

Interventions

OTHERquestionnaire administration

PROCEDUREstudy of high risk factors

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Inclusion criteria

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

Design outcomes

Primary

Measure	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	—

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026