search
Back to results

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

Primary Purpose

Brain and Central Nervous System Tumors

Status
Completed
Phase
Locations
United States
Study Type
Observational
Intervention
questionnaire administration
study of high risk factors
Sponsored by
National Institutes of Health Clinical Center (CC)
About
Eligibility
Locations
Outcomes
Full info

About this trial

This is an observational trial for Brain and Central Nervous System Tumors focused on measuring brain tumor

Eligibility Criteria

18 Years - 65 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

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

Sites / Locations

  • Exponent, Inc.
  • National Institute for Occupational Safety and Health

Outcomes

Primary Outcome Measures

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

Secondary Outcome Measures

Full Information

First Posted
June 19, 2006
Last Updated
March 7, 2012
Sponsor
National Institutes of Health Clinical Center (CC)
Collaborators
National Cancer Institute (NCI)
search

1. Study Identification

Unique Protocol Identification Number
NCT00340054
Brief Title
Developing Interview Questions to Estimate Workplace Exposure to Electric and Magnetic Fields
Official Title
Assessment of Occupational EMF Exposure - Validation of Interview Procedures Used in Brain Tumor Study
Study Type
Observational

2. Study Status

Record Verification Date
March 2012
Overall Recruitment Status
Completed
Study Start Date
October 2005 (undefined)
Primary Completion Date
undefined (undefined)
Study Completion Date
March 2007 (Actual)

3. Sponsor/Collaborators

Name of the Sponsor
National Institutes of Health Clinical Center (CC)
Collaborators
National Cancer Institute (NCI)

4. Oversight

5. Study Description

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.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Brain and Central Nervous System Tumors
Keywords
brain tumor

7. Study Design

Enrollment
108 (Anticipated)

8. Arms, Groups, and Interventions

Intervention Type
Other
Intervention Name(s)
questionnaire administration
Intervention Type
Procedure
Intervention Name(s)
study of high risk factors
Primary Outcome Measure Information:
Title
Validation of an interview-based electric and magnetic field (EMF) exposure assessment algorithm
Title
Calibration of algorithm parameters
Title
Correlation between EMF exposure estimates from the algorithm with biologically based metrics measured by new instrumentation

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
65 Years
Accepts Healthy Volunteers
No
Eligibility 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
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Joseph Coble, DSc
Organizational Affiliation
National Cancer Institute (NCI)
Official's Role
Study Chair
Facility Information:
Facility Name
Exponent, Inc.
City
Menlo Park
State/Province
California
ZIP/Postal Code
94025
Country
United States
Facility Name
National Institute for Occupational Safety and Health
City
Cincinnati
State/Province
Ohio
ZIP/Postal Code
45226
Country
United States

12. IPD Sharing Statement

Citations:
PubMed Identifier
10782189
Citation
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.
Results Reference
background

Learn more about this trial

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

We'll reach out to this number within 24 hrs