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

NCT ID: NCT00340054

Last Updated: 2012-03-08

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 108 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2005-10-31
• Study Completion Date: 2007-03-31

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.

Conditions

Brain and Central Nervous System Tumors

Interventions

questionnaire administration

Intervention Type: OTHER

study of high risk factors

Intervention Type: PROCEDURE

Eligibility Criteria

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

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

National Cancer Institute (NCI)

NIH

Sponsor Role: collaborator

National Institutes of Health Clinical Center (CC)

NIH

Sponsor Role: lead

Principal Investigators

Joseph Coble, DSc

Role: STUDY_CHAIR

National Cancer Institute (NCI)

Locations

Exponent, Inc.

Menlo Park, California, United States

National Institute for Occupational Safety and Health

Cincinnati, Ohio, United States

Countries

United States

References

Kelsh MA, Kheifets L, Smith R. The impact of work environment, utility, and sampling design on occupational magnetic field exposure summaries. AIHAJ. 2000 Mar-Apr;61(2):174-82. doi: 10.1080/15298660008984526.

Reference Type: BACKGROUND

PMID: 10782189 (View on PubMed)

Other Identifiers

06-C-N013

Identifier Type: -

Identifier Source: secondary_id

999906013

Identifier Type: -

Identifier Source: secondary_id

CDR0000551595

Identifier Type: -

Identifier Source: secondary_id

99906013

Identifier Type: -

Identifier Source: org_study_id

NCT00481910

Identifier Type: -

Identifier Source: nct_alias