Table 1.
Summary statistics
| Variable | Obs | Mean (N, proportion) | SD | Min | Max |
| No of unscheduled hospital admissions and ED visits (visits/person/year) | 2808 | 3.86 | 3.97 | 0 | 33 |
| No of unscheduled hospital admissions (non-ED) (admissions/person/year) | 2808 | 2.91 | 3.25 | 0 | 31 |
| No of ED visits (visits/person/year) | 2808 | 0.95 | 1.43 | 0 | 14 |
| Length of stay for unscheduled admissions (days) | 2808 | 9.43 | 15.29 | 0 | 290 |
| Total cost from unscheduled admissions and ED visits (£/person/year) | 2808 | 10 829 | 14 550 | 0 | 284 252 |
| Total cost for ED visits+scheduled and unscheduled admissions (£/person/year) | 2808 | 22 249 | 32 287 | 0 | 294 837 |
| Female | 2808 | (1,374, 48.9%) | – | 0 | 1 |
| Age group 16–24 | 2808 | (266, 9.5%) | – | 0 | 1 |
| Age group 25–34 | 2808 | (418, 14.9%) | – | 0 | 1 |
| Age group 35–44 | 2808 | (464, 16.5%) | – | 0 | 1 |
| Age group 45–54 | 2808 | (608, 21.7%) | – | 0 | 1 |
| Age group 55–64 | 2808 | (512, 18.2%) | – | 0 | 1 |
| Age group 65–74 | 2808 | (478, 17.0%) | – | 0 | 1 |
| Age group 75 up | 2808 | (62, 2.2%) | – | 0 | 1 |
| SIMD quintile 1 | 2712 | (810, 29.9%) | – | 0 | 1 |
| SIMD quintile 2 | 2712 | (872, 32.2%) | – | 0 | 1 |
| SIMD quintile 3 | 2712 | (418, 15.4%) | – | 0 | 1 |
| SIMD quintile 4 | 2712 | (306, 11.3%) | – | 0 | 1 |
| SIMD quintile 5 | 2712 | (306, 11.3%) | – | 0 | 1 |
| SPARRA score at entry | 2676 | 70.27 | 19.78 | 6 | 95 |
ED, emergency department; SIMD, Scottish Index of Multiple Deprivation; SPARRA, Scottish Patients at Risk of Readmission and Admission.