Table 1.
Summary of study design, participant characteristics, and environmental conditions by blood draw and date.
| Draw | Draw 1 | Draw 2 | Draw 3 | Draw 4 | ||||
|---|---|---|---|---|---|---|---|---|
| Date (mm/dd) (2009) | 01/15 | 01/20 | 01/22 | 02/03 | 02/19 | 02/24 | 02/26 | 03/03 |
| Variable Group | G1 | G2 | G1 | G2 | G1 | G2 | G1 | G2 |
| Sex n (%) Female Male | 3 (43) | 4 (50) | 3 (43) | 4 (50) | 3 (43) | 4 (50) | 3 (43) | 4 (50) |
| 4 (57) | 4 (50) | 4 (57) | 4 (50) | 4 (57) | 4 (50) | 4 (57) | 4 (50) | |
| Age (years ± SE) | 22 ± 1 | 22 ± 0 | 22 ± 1 | 22 ± 0 | 22 ± 1 | 22 ± 0 | 22 ± 1 | 22 ± 0 |
| Environmental Factors | ||||||||
| Temperature (°C) | −3 | −4 | 2 | 0 | 1 | 11 | 7 | 15 |
| Relative Humidity (%) | 66 | 61 | 76 | 62 | 51 | 53 | 51 | 26 |
| Barometric Pressure (in Hg) | 30.34 | 30.34 | 29.93 | 30.29 | 30.21 | 29.84 | 29.72 | 29.65 |
| PM2.5 (μg/m3) | 35 | 74 | 83 | 31 | 8 | 6 | 9 | 10 |
Notes: Study participants’ characteristics (n = 15 subjects; all Caucasian) and the environmental factors designated by blood draw and date. Values = mean ± SE. Participants were divided into two study groups (G1, G2) for each blood draw. PM2.5 levels are given as 24 h average before blood draw.
Abbr.: PM: particulate matter.