Table 1 Characteristics and exposure-levels of the study participants
From: Effects of airborne pollutants on mitochondrial DNA Methylation
Study | Characteristics | High exposure | Low exposure | |
|---|---|---|---|---|
Study 1 Exposure to metal-rich particulate matter (PM) | High-exposed steel workers (n = 20) | Controls (n = 20) | ||
Participants | Age [Years], mean ± SD | 42.5 ± 7.7 | 37.6 ± 2.8 | |
Ex/current smokers, n (%) | 12 (60) | 14 (70) | ||
Exposure (PM1, μg/m3) | Mean ± SD | 9.2 ± 2.4 | 2.5 ± 0.7 | |
Range | [7.6; 11.8] | [1.7; 3.8] | ||
Study 2 Exposure to air benzene | Gas-station attendants (n = 20) | Controls (n = 20) | ||
Participants | Age [Years], mean ± SD | 39.9 ± 11.2 | 39.7 ± 10.4 | |
Ex/current smokers, n (%) | 7 (35) | 5 (25) | ||
Exposure (Benzene, μg/m3) | Mean ± SD | 78.6 ± 42.5 | 7.0 ± 5.5 | |
Range | [31.2; 180.1] | [4.2; 23.0] | ||
Study 3 Exposure to traffic-derived elemental carbon | Truck drivers (n = 20) | Controls (n = 20) | ||
Participants | Age [Years], mean ± SD | 35.2 ± 5.1 | 33.4 ± 5.9 | |
Ex/current smokers, n (%) | 8 (40) | 6 (30) | ||
Exposure (Elemental Carbon, μg/m3) | Mean ± SD | 21.3 ± 4.7 | 13.4 ± 2.1 | |
Range | [16.6; 35.6] | [7.8; 16.1] |