Associations of pre- and postoperative AMT scores with outcomes
| AMT <8 preop | AMT ≥8 preop | Sig. | AMT<8 postop | AMT ≥8 postop | Sig. | |
|---|---|---|---|---|---|---|
| 30-day and 4-month mortality | 2 (1.3%) | 6 (3.9%) | 1.0 | 4/54 (7.4%) | 4/100 (4%) | .597 |
| 30-day readmission | 8/36 (22.2%) | 19/118 (16.1%) | .552 | 14/54 (25.9%) | 13/100 (13%) | .073 |
| 120-day readmission | 14/36 (39%) | 17/118 (14.4%) | .003 OR 2.7 (1.48–4.9) | 16/54 (29.6%) | 15/100 (15%) | .051 |
| Delirium diagnosis | 18/36 (50%) | 22/118 (18.6%) | .000 OR 2.68 (1.6–4.4) | 30/54 (55.6%) | 10/100 (10%) | .000 OR 5.5 (2.9–10.5) |
| Pre-existing dementia diagnosis | 18/36 (50%) | 7/118 (5.9%) | .000 OR 8.43 (3.8–18.6) | 20/54 (37%) | 5% (5/100) | .000 OR 7.4 (2.9–18.6) |
| Days awaiting transfer to IMC | 6.5 (2.75–9.75) | 2 (1.5–6.5) | .015 z= -2.43 | 5 (2–8.75) | 3 (1.5–6.5) | .193 |
| Median acute LOS (days) | 17.5 (12–26) | 9 (6.75–14) | .000 z= -4.84 | 16.5 (11–26.75) | 9 (6–12.75) | .000 z= -5.71 |
| Median super-spell (days) | 62.5 (46.75–83) | 45 (34–70.5) | .032 z= -2.1 | 64 (46.5–81.2) | 43 (30.5–65) | .003 z= -2.97 |
AMT = Abbreviated Mental Test; IMC = intermediate care; LOS = length of stay; Sig = significance