Geometric means (GM) and geometric SD (GSD) on adjusted PM2.5 data and salivary cotinine for control and enhanced interventions
| Average PM2.5 (μg/m3) | Maximum PM2.5 (μg/m3) | % of time over 35 μg/m3 | Salivary cotinine (ng/ml) | |||||
| Baseline | Final | Baseline | Final | Baseline | Final | Baseline | Final | |
| Control GM | 25 | 24 | 190 | 148 | 7.02 | 3.60 | 1.69 | 1.42 |
| GSD | 3 | 5 | 4 | 4 | 13.39 | 32.34 | 4.45 | 3.15 |
| Number | 28 | 27 | 28 | 27 | 28 | 27 | 19 | 20 |
| Enhanced GM | 19 | 11 | 135 | 67* | 3.44 | 0.49* | 3.18 | 1.87 |
| GSD | 3 | 4 | 4 | 3 | 25.77 | 50.17 | 3.10 | 2.44 |
| Number | 25 | 20 | 25 | 20 | 25 | 20 | 21 | 15 |
| All GM | 22 | 17 | 161 | 105 | 5.01 | 1.54 | 2.36 | 1.60 |
| GSD | 3 | 4 | 4 | 4 | 18.45 | 43.08 | 3.80 | 2.83 |
| Number | 53 | 47 | 53 | 47 | 53 | 47 | 40 | 35 |
↵* Indicates significantly different from baseline (p<0.05).