Distributions of distance to different classes of roads at ARIC participant residences (in metres, n = 13 972)*
| Mean | SD | Minimum | P25 | Median | P75 | Maximum | |
|---|---|---|---|---|---|---|---|
| P25 and P75, 25th and 75th percentile. | |||||||
| *Interstate highways (class 1), state highways (class 2), major arterials (class 3) and local roads (class 4). | |||||||
| Distance to class 1 roads | 2207 | 2008 | 30 | 896 | 1795 | 2774 | 17053 |
| Distance to class 2 roads | 2755 | 2573 | 20 | 923 | 2254 | 3593 | 22382 |
| Distance to class 3 roads | 363 | 502 | 10 | 103 | 230 | 427 | 5389 |
| Distance to class 4 roads | 29 | 42 | 10 | 10 | 18 | 31 | 833 |