Table 1.
Baseline Characteristics of Cohort and In-hospital Course of Delirium
| Characteristics | Overall (N = 193)* | Dementia (N = 136) | No Dementia (N = 45) | P Value† |
|---|---|---|---|---|
| Categorical variables, n (%) | ||||
| Sex | .32 | |||
| Female | 119 (61.7) | 84 (61.8) | 24 (53.3) | |
| Male | 74 (38.3) | 52 (38.2) | 21 (46.7) | |
| Marital status | .05 | |||
| Married | 62 (32.1) | 39 (28.7) | 20 (44.4) | |
| Single/widowed/divorced | 131 (67.9) | 97 (71.3) | 25 (55.6) | |
| Education | .87 | |||
| Secondary or less | 91 (49.5) | 66 (48.5) | 22 (50.0) | |
| More than high school | 93 (50.5) | 70 (51.5) | 22 (50.0) | |
| (missing) | (9) | (0) | (1) | |
| Residence | .003 | |||
| Home | 142 (73.6) | 93 (68.4) | 41 (91.1) | |
| Other | 51 (26.4) | 43 (31.6) | 4 (8.9) | |
| Delirium type | .004 | |||
| Prevalent | 165 (85.5) | 123 (90.4) | 33 (73.3) | |
| Incident | 28 (14.5) | 13 (9.6) | 12 (26.7) | |
| Course of delirium | .0001 | |||
| Transient | 76 (39.4) | 40 (29.4) | 30 (66.7) | |
| Recovered‡ | 56 (29.0) | 43 (31.6) | 10 (22.2) | |
| Persistent‡ | 61 (31.6) | 53 (39.0) | 5 (11.1) | |
| Mean continuous variables (±SD) | ||||
| At enrollment | ||||
| Age | 83.4 (7.3) | 84.3 (6.8) | 80.4 (7.6) | .001 |
| Severity of illness | 5.1 (1.3) | 5.2 (1.3) | 5.2 (1.1) | .98 |
| Acute physiology score | 4.4 (2.8) | 4.6 (2.9) | 4.2 (2.8) | .40 |
| Charlson Comorbidity Index | 2.5 (1.8) | 2.5 (1.6) | 2.4 (1.9) | .77 |
| In-hospital course of delirium | ||||
| Time to cognitive improvement (days) | 10.8 (10.1) | 11.7 (10.4) | 9.0 (9.4) | .12 |
| Number of days with delirium | 7.0 (9.1) | 8.3 (9.6) | 4.1 (7.5) | .009 |
| Length of 1st delirium episode (days) | 6.3 (9.4) | 8.3 (9.6) | 3.9 (8.1) | .03 |
| Proportion of days with delirium | 0.4 (0.4) | 0.5 (0.4) | 0.2 (0.3) | <.001 |
| Length of stay (days, from admission) | 18.3§ (17.3§) | 18.9§ (18.6§) | 17.5 (14.5) | .60 |
*
Presence of dementia was unknown in 12 patients.
†
P value of χ2 or Fisher's exact test for categorical variables. P value of F test from 1-way ANOVA for continuous variables.
‡
At discharge or at 8 weeks if patient still in hospital.
§
One missing value.
SD, standard deviation.