Personal Monitoring Studies
Carbon Monoxide. Ted Johnson conducted the Denver Personal Monitoring Study, the largest city-wide study to equip subjects with portable carbon monoxide monitors and time/activity diaries (900 subject-days). This study also collected breath samples for estimating the carboxyhemoglobin levels experienced by each subject.
Ozone. Ted Johnson directed the Research Triangle Personal Monitoring Study, the first and only study to equip subjects with portable one-minute ozone monitors, pulse rate monitors, and time/activity diaries. Ted Johnson also designed the Los Angeles Scripted Activity Study, the first study to measure personal ozone exposure as subjects followed prepared activity scripts. He conducted a follow-up study in Houston. During these studies, trained technicians (including Jill Mozier) were equipped with ozone monitors and real-time diaries as they followed prepared activity scripts. Mr. Johnson performed statistical analyses on the data to better characterize the relationships between personal ozone exposures in selected microenvironments and fixed-site ozone measurements.
Ultraviolet B. Ted Johnson designed and directed the UVB Personal Monitoring Study, the first such study focused on gathering data useful in (1) identifying the best predictors of UVB exposure and (2) developing a computer-based model that can be used to estimate UVB exposure as a function of these predictors. Tom Long carried a UVB monitor, GPS system, and other monitoring equipment in Raleigh, NC, while recording diary entries describing location, weather conditions, and other factors likely to affect his UVB exposure. Tom Long also acquired data from local fixed-site UVB monitors, meteorological stations, and air pollution monitors. He compiled the field and fixed-site data into a master database suitable for statistical analysis.
Volatile Organic Compounds (VOC’s). Ted Johnson, Jill Mozier, and Tom Long developed scripts and diaries for the Baltimore Scripted Activity Study, the first study to measure personal exposures to multiple pollutants (including VOC’s) as subjects followed prepared activity scripts. Mr. Long obtained fixed-site pollutant and meteorological data and compiled the master statistical analysis database. Mr. Johnson conducted in-depth statistical analyses of the data and used the results to develop an exposure model for PM2.5.
Aldehydes. Ted Johnson assisted in the design of the Sacramento/Milwaukee Scripted Activity Study, the first scripted activity study to measure aldehyde exposure. He developed scripts, diaries, and questionnaires for the study and conducted an in-depth statistical analysis of the results. Mr. Long obtained fixed-site pollutant and meteorological data from various sources and prepared the master statistical analysis database.