scholarly journals A population-based exposure assessment methodology for carbon monoxide: Development of a carbon monoxide passive sampler and occupational dosimeter

1997 ◽  
Author(s):  
Michael G. Apte
Keyword(s):  
Carbon Monoxide ◽  
Exposure Assessment ◽  
Population Based ◽  
Passive Sampler ◽  
Assessment Methodology

scholarly journals Deployment, Calibration, and Cross-Validation of Low-Cost Electrochemical Sensors for Carbon Monoxide, Nitrogen Oxides, and Ozone for an Epidemiological Study

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4214
Author(s):  
Christopher Zuidema ◽  
Cooper S. Schumacher ◽  
Elena Austin ◽  
Graeme Carvlin ◽  
Timothy V. Larson ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Exposure Assessment ◽  
Epidemiological Study ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
Puget Sound ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Calibration Models ◽  
Study Participants

We designed and built a network of monitors for ambient air pollution equipped with low-cost gas sensors to be used to supplement regulatory agency monitoring for exposure assessment within a large epidemiological study. This paper describes the development of a series of hourly and daily field calibration models for Alphasense sensors for carbon monoxide (CO; CO-B4), nitric oxide (NO; NO-B4), nitrogen dioxide (NO2; NO2-B43F), and oxidizing gases (OX-B431)—which refers to ozone (O3) and NO2. The monitor network was deployed in the Puget Sound region of Washington, USA, from May 2017 to March 2019. Monitors were rotated throughout the region, including at two Puget Sound Clean Air Agency monitoring sites for calibration purposes, and over 100 residences, including the homes of epidemiological study participants, with the goal of improving long-term pollutant exposure predictions at participant locations. Calibration models improved when accounting for individual sensor performance, ambient temperature and humidity, and concentrations of co-pollutants as measured by other low-cost sensors in the monitors. Predictions from the final daily models for CO and NO performed the best considering agreement with regulatory monitors in cross-validated root-mean-square error (RMSE) and R2 measures (CO: RMSE = 18 ppb, R2 = 0.97; NO: RMSE = 2 ppb, R2 = 0.97). Performance measures for NO2 and O3 were somewhat lower (NO2: RMSE = 3 ppb, R2 = 0.79; O3: RMSE = 4 ppb, R2 = 0.81). These high levels of calibration performance add confidence that low-cost sensor measurements collected at the homes of epidemiological study participants can be integrated into spatiotemporal models of pollutant concentrations, improving exposure assessment for epidemiological inference.

scholarly journals A population-based exposure assessment of risk factors associated with gastrointestinal pathogens: a Campylobacter study

2012 ◽  
Vol 141 (5) ◽  
pp. 976-986 ◽  
Author(s):  
L. A. MacRITCHIE ◽  
C. J. HUNTER ◽  
N. J. C. STRACHAN
Keyword(s):  
Risk Factors ◽  
Population Density ◽  
Exposure Assessment ◽  
Disease Incidence ◽  
Univariate Analysis ◽  
Age Groups ◽  
Multivariate Logistic Regression Analysis ◽  
Environmental Water ◽  
Population Based ◽  
Elevated Exposure

SUMMARYA questionnaire survey was undertaken to determine the exposure of a study population to campylobacteriosis source risk factors (environmental, water, food) and results were stratified by age, population density and deprivation. Data were gathered using an exposure assessment carried out by telephone in the Grampian region of Scotland. Univariate analysis showed that children aged 5–14 years, living in low population density (0–44·4 persons/km2) and affluent areas had elevated exposure to environmental and water risk factors. Multivariate logistic regression analysis revealed that younger age groups and lower population density were significant indicators for most environmental risk factors. The results compared to reported disease incidence in Grampian showed that greater exposure to risk factors does not necessarily coincide with greater disease incidence for age groups, particularly for the 0–4 years age group. Further research is required to explain the relationship between exposure and disease incidence.

A passive sampler for measurement of carbon monoxide using a solid adsorbent

1992 ◽  
Vol 26 (4) ◽  
pp. 697-702 ◽  
Author(s):  
Kiyoung Lee ◽  
Yukio Yanagisawa ◽  
Masakazu Hishinuma ◽  
John D. Spengler ◽  
Irwin H. Billick
Keyword(s):  
Carbon Monoxide ◽  
Passive Sampler ◽  
Solid Adsorbent

scholarly journals Characterizing Short-Term Jobs in a Population-Based Study

2019 ◽  
Vol 63 (6) ◽  
pp. 701-705 ◽  
Author(s):  
Marie-Élise Parent ◽  
Hugues Richard ◽  
Jean-François Sauvé
Keyword(s):  
Exposure Assessment ◽  
Population Based ◽  
Short Term ◽  
Population Based Study ◽  
Outdoor Work ◽  
Disease Aetiology ◽  
Lifetime Exposure ◽  
Poor Ventilation ◽  
Work Histories ◽  
Control Study

Abstract Background Work histories generally cover all jobs held for ≥1 year. However, it may be time and cost prohibitive to conduct a detailed exposure assessment for each such job. While disregarding short-term jobs can reduce the assessment burden, this can be problematic if those jobs contribute important exposure information towards understanding disease aetiology. Objective To characterize short-term jobs, defined as lasting more than 1 year, but less than 2 years, in a population-based study conducted in Montreal, Canada. Methods In 2005–2012, we collected work histories for some 4000 participants in a case-control study of prostate cancer. Overall, subjects had held 19 462 paid jobs lasting ≥1 year, including 3655 short-term jobs. Using information from interviews and from the Canadian Classification and Dictionary of Occupations, we characterized short-term jobs and compared them to jobs held ≥2 years. Results Short-term jobs represented <4% of subjects’ work years on average. Forty-five per cent of subjects had at least one short-term job; of these, 49% had one, 24% had two, and 27% had at least three. Half of all short-term jobs had been held before the age of 24. Short-term jobs entailed more often exposure to fumes, odours, dust, and/or poor ventilation than longer jobs (17 versus 13%), as well as outdoor work (10 versus 5%) and heavy physical activity (16 versus 12%). Conclusions Short-term jobs occurred often in early careers and more frequently entailed potentially hazardous exposures than longer-held jobs. However, as they represented a small proportion of work years, excluding them should have a marginal impact on lifetime exposure assessment.

Receptor Modeling Assessment of Particle Total Exposure Assessment Methodology Data

1999 ◽  
Vol 33 (20) ◽  
pp. 3645-3652 ◽  
Author(s):  
Elen Yakovleva ◽  
Philip K. Hopke ◽  
Lance Wallace
Keyword(s):  
Exposure Assessment ◽  
Receptor Modeling ◽  
Assessment Methodology ◽  
Total Exposure

Exposure assessment for nitrogen oxides and carbon monoxide in German hard coal mining

2009 ◽  
Vol 82 (10) ◽  
pp. 1267-1279 ◽  
Author(s):  
Dirk Dahmann ◽  
Peter Morfeld ◽  
Christian Monz ◽  
Birgit Noll ◽  
Frank Gast
Keyword(s):  
Carbon Monoxide ◽  
Nitrogen Oxides ◽  
Exposure Assessment ◽  
Coal Mining ◽  
Hard Coal ◽  
Hard Coal Mining

Comparison of volatile organic levels between sites and seasons for the total exposure assessment methodology (TEAM) study

1987 ◽  
Vol 21 (11) ◽  
pp. 2413-2424 ◽  
Author(s):  
T.D. Hartwell ◽  
E.D. Pellizzari ◽  
R.L. Perritt ◽  
R.W. Whitmore ◽  
H.S. Zelon ◽  
...  
Keyword(s):  
Exposure Assessment ◽  
Assessment Methodology ◽  
Total Exposure ◽  
Volatile Organic
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