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.
- 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.
Brain and Central Nervous System Tumors
questionnaire administration, study of high risk factors
Active, not recruiting
National Cancer Institute (NCI)
Results (where available)
- Source: http://clinicaltrials.gov/show/NCT00340054
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
Factors that can cause or prevent the outcome of interest, are not intermediate variables, and are not associated with the factor(s) under investigation. They give rise to situations in which the effects of two processes are not separated, or the contribution of causal factors cannot be separated, or the measure of the effect of exposure or risk is distorted because of its association with other factors influencing the outcome of the study.
Reduction of high-risk choices and adoption of low-risk quantity and frequency alternatives.
The relating of causes to the effects they produce. Causes are termed necessary when they must always precede an effect and sufficient when they initiate or produce an effect. Any of several factors may be associated with the potential disease causation or outcome, including predisposing factors, enabling factors, precipitating factors, reinforcing factors, and risk factors.
Self report questionnaire which yields 16 scores on personality traits, such as reserved vs. outgoing, humble vs. assertive, etc.
The application of drug preparations to the surfaces of the body, especially the skin (ADMINISTRATION, CUTANEOUS) or mucous membranes. This method of treatment is used to avoid systemic side effects when high doses are required at a localized area or as an alternative systemic administration route, to avoid hepatic processing for example.
RATIONALE: Evaluating genetic and environmental factors in individuals and families at high risk of developing hematologic cancer may help doctors plan more effective treatments. PURPOSE:...
RATIONALE: Studying individuals and families at high risk for breast or ovarian cancer may help in identifying the genes involved in the development of breast and ovarian cancer and help t...
RATIONALE: Studying individuals and families at high risk for cancer may help to identify other persons at risk and identify cancer genes. PURPOSE: This clinical trial is studying genetic...
RATIONALE: Gathering information about genetic factors in women with an increased risk of ovarian cancer over time may help doctors learn more about the disease and find better methods of...
RATIONALE: Gathering information about genetic and environmental factors may help doctors learn more about a person's risk for developing prostate cancer. PURPOSE: This clinical trial is...
Central pontine and extrapontine myelinolysis (CPEPM) is a rare but potentially fatal complication after orthotopic liver transplantation (OLT). The aim of this study was to identify risk factors for...
This study investigated the prevalence and determinants of hyperuricemia in Chinese type 2 diabetes mellitus (T2DM) patients with central obesity. A multicentric hospital-based cross-sectional study w...
Aim. To study the impact of birth characteristics on the risk of atopic dermatitis in a twin population. Methods. In a population-based questionnaire study of 10,809 twins, 3-9 years of age, from the...
Objective. Little is known about prevalence of osteoporosis risk factors among American Indians and Alaska Natives (AIAN). Methods. We included AIAN people (n=8,039) enrolled in the Education and Rese...
Symptoms from the eyes are common among computer users. Knowledge is scarce about these problems, however. Objectives: The aim was to study risk-factors, incidence and persistence of eye-symptoms amon...