| Mean | SD | Min | Max | N |
---|---|---|---|---|---|
Panel A. Accidents | |||||
 Radiography or ultrasound | 0.14 | 0.34 | 0 | 1 | 8,496 |
 MRI or CT | 0.24 | 0.43 | 0 | 1 | 8,496 |
 Any imaging | 0.36 | 0.48 | 0 | 1 | 8,496 |
Panel B. Illnesses | |||||
 Radiography or ultrasound | 0.10 | 0.30 | 0 | 1 | 29,332 |
 MRI or CT | 0.07 | 0.25 | 0 | 1 | 29,332 |
 Any imaging | 0.16 | 0.37 | 0 | 1 | 29,332 |