Table 3.
Proportion of patients in each frailty risk category under different forms of the HFRS
| Low frailty risk | Intermediate frailty risk | High frailty risk | ||
|---|---|---|---|---|
| Current admission alone (a) | 373 799 (55·4%) | 251 009 (37·2%) | 49 807 (7·4%) | |
| HFRS 1-year window | ||||
| Current admission plus previous admission in preceding year (a + 1,1) | 301 882 (44·7%) | 270 652 (40·1%) | 102 081 (15·1%) | |
| Current admission plus previous 2 admissions in preceding year (a + 2,1) | 283 891 (42·1%) | 262 129 (38·9%) | 128 595 (19·1%) | |
| Current admission plus previous 3 admissions in preceding year (a + 3,1) | 278 364 (41·3%) | 256 593 (38·0%) | 139 658 (20·7%) | |
| Current admission plus previous 4 admissions in preceding year (a + 4,1) | 276 330 (41·0%) | 254 017 (37·7%) | 144 268 (21·4%) | |
| Current admission plus previous n admissions in preceding year (a + n,1) | 274 419 (40·7%) | 251 491 (37·3%) | 148 705 (22·0%) | |
| HFRS 2-year window | ||||
| Current admission plus previous admission in preceding 2 years (a + 1,2) | 288 411 (42·8%) | 275 278 (40·8%) | 110 926 (16·4%) | |
| Current admission plus previous 2 admissions in preceding 2 years (a + 2,2) | 263 432 (39·0%) | 263 944 (39·1%) | 147 239 (21·8%) | |
| Current admission plus previous 3 admissions in preceding 2 years (a + 3,2) | 254 826 (37·8%) | 254 875 (37·8%) | 164 914 (24·4%) | |
| Current admission plus previous 4 admissions in preceding 2 years (a + 4,2) | 251 347 (37·3%) | 249 942 (37·0%) | 173 326 (25·7%) | |
| Current admission plus previous n admissions in preceding 2 years (a + n,2) | 247 640 (36·7%) | 243 487 (36·1%) | 183 488 (27·2%) | |
Percentages are proportions of a total of 674 615 observations. HFRS=Hospital Frailty Risk Score.