Table 3. Association of DEL-S Score With Hospital Outcomesa.
| DEL-S score | Patients, No. | Adjusted mean (95% CI)b | |
|---|---|---|---|
| Length of stay, d (n = 352) | Hospital costs, $US in thousands (n = 299) | ||
| DEL-S short form | |||
| 0 | 64 | 6.9 (5.8-7.9) | 34.2 (22.9-45.5) |
| 1 | 92 | 7.5 (6.6-8.4) | 38.7 (29.5-47.9) |
| 2-3 | 86 | 9.5 (8.0-11.1) | 41.2 (31.8-50.6) |
| 4-5 | 37 | 9.7 (8.1-11.3) | 36.4 (22.5-50.4) |
| 6-9 | 29 | 13.3 (9.8-16.7) | 57.7 (41.8-73.7) |
| P value for trendc | NA | <.001 | .004 |
| DEL-S long form | |||
| 0 | 55 | 6.7 (5.6-7.9) | 36.0 (23.6-48.4) |
| 1 | 88 | 7.4 (6.6-8.3) | 38.7 (29.3-48.1) |
| 2-4 | 94 | 9.3 (8.0-10.7) | 40.8 (31.7-49.8) |
| 5-6 | 38 | 9.8 (7.7-11.9) | 37.4 (23.1-51.6) |
| 7-14 | 33 | 12.5 (9.6-15.3) | 51.7 (36.5-66.9) |
| P value for trendc | NA | <.001 | .01 |
Abbreviations: DEL-S, delirium-severity score; NA, not applicable.
a
Maximum (peak) Confusion Assessment Method–Severity score during each patient’s hospitalization was used in all analyses.
b
Models were adjusted for age, sex, race and ethnicity, dementia, or mild cognitive impairment at time of enrollment.
c
The P value for trend is a linear trend statistic derived from general linear models with a log-link function for the association of the DEL-S with each outcome.