Measurement time, min | Original scale | Log-transformed data* | ||||
Mean (SD) | Median | Minimum–maximum | Mean (SD) | Minimum–maximum | ||
Background | 913 | 9.3 (6.6) | 8.0 | 0 to 148 | 1.9 (1.2) | −4.6 to 5.0 |
Outdoor | ||||||
0 cigarettes | 1037 | 9.1 (6.9) | 8.0 | 0 to 155 | 1.9 (0.9) | −4.6 to 5.0 |
1–4 cigarettes | 754 | 15.2 (17.2) | 11.0 | 0 to 496 | 2.3 (1.1) | −4.6 to 6.2 |
5+ cigarettes | 112 | 22.8 (27.8) | 16.0 | 3 to 434 | 2.8 (0.8) | 1.1 to 6.1 |
Indoor† | ||||||
0 cigarettes | 1037 | 6.5 (4.6) | 5.0 | 0 to 59 | 1.7 (0.6) | −4.6 to 4.1 |
1–4 cigarettes | 754 | 6.3 (4.0) | 6.0 | 0 to 35 | 1.7 (0.7) | −4.6 to 3.6 |
5+ cigarettes | 112 | 4.7 (3.0) | 4.0 | 2 to 20 | 1.4 (0.5) | 0.7 to 3.0 |