Table 1.
Descriptive statistics for breath tests, sobriety checkpoints, and covariates, aggregated over 338 weeks within 528 SA2 polygons (SA2-weeks) and 84 SA3 polygons (SA3-weeks).
| Mean | SD | Min | Max | |
|---|---|---|---|---|
| SA2-weeks (n = 170,945) | ||||
| Tests (count) | 94.6 | 156.3 | 0.0 | 5684.0 |
| Positive tests (count) | 0.9 | 1.7 | 0.0 | 100.0 |
| Proportion of tests that were positive | 0.0 | 0.1 | 0.0 | 1.0 |
| Local checkpoints | 0.0 | 0.3 | 0.0 | 9.0 |
| Local roadway kms | 468.9 | 1489.9 | 7.7 | 17964.3 |
| Local checkpoints per 500 roadway kms | 0.2 | 1.6 | 0.0 | 128.3 |
| Adjacent checkpoints | 0.2 | 0.6 | 0.0 | 14.0 |
| Adjacent roadway kms | 2955.3 | 7182.0 | 0.0 | 63676.1 |
| Adjacent checkpoints per 500 roadway kms | 0.2 | 0.7 | 0.0 | 22.8 |
| Rainfall (mm) | 21.5 | 45.3 | 0.0 | 923.5 |
| Maximal temperature (°C) | 27.2 | 3.8 | 11.3 | 44.7 |
| SA3-weeks (n = 27,496) | ||||
| Tests (count) | 609.5 | 543.4 | 0.0 | 7244.0 |
| Positive tests (count) | 5.8 | 5.5 | 0.0 | 107.0 |
| Proportion of tests that were positive | 0.0 | 0.0 | 0.0 | 0.4 |
| Local checkpoints | 0.3 | 0.7 | 0.0 | 14.0 |
| Local roadway kms | 2935.5 | 7025.4 | 156.9 | 53327.6 |
| Local checkpoints per 500 roadway kms | 0.2 | 0.7 | 0.0 | 28.1 |
| Adjacent checkpoints | 1.2 | 1.7 | 0.0 | 19.0 |
| Adjacent roadway kms | 14968.1 | 23880.7 | 533.8 | 98815.4 |
| Adjacent checkpoints per 500 roadway kms | 0.1 | 0.3 | 0.0 | 6.1 |
| Total rainfall (mm) | 21.5 | 44.7 | 0.0 | 863.7 |
| Maximal temperature (°C) | 27.1 | 3.9 | 13.8 | 44.6 |