Predicting Delirium Duration in Elderly Hip-Surgery Patients: Does Early Symptom Profile Matter?
Table 1
Baseline clinical and demographic characteristics of patients in the short and prolonged delirium group.
Characteristic
Short delirium
Prolonged delirium
OR (95% CI)
value
Age*
84.6 ± 4.7
85.6 ± 5.9
1.04 (0.93–1.15)
0.50
Female°
17 (77.3)
21 (72.4)
1.30 (0.36–4.69)
0.69
Mini-Mental State Examination (MMSE) score
23.0 ± 3.1
19.6 ± 5.5
0.84 (0.71–0.99)
0.02
APACHE II score*§
13.3 ± 3.0
13.9 ± 3.1
1.14 (0.87–1.49)
0.34
Snellen test*
31.6 ± 18.1
38.6 ± 35.5
1.01 (0.98–1.04)
0.41
Barthel ADL Index score*△
17.4 ± 3.0
14.0 ± 4.1
0.76 (0.62–0.93)
0.003
Lawton IADL score*≈
14.8 ± 5.8
18.6 ± 8.3
1.08 (0.99–1.17)
0.08
Geriatric Depression Scale-15 score*†
6.4 ± 1.1
6.4 ± 1.7
0.98 (0.61–1.59)
0.95
CRP value*
12.7 ± 25.2
13.4 ± 28.5
1.00 (0.98–1.02)
0.76
History of previous delirium°
0 (0)
12 (46.2)
N.A.
0.001
IQCODE-N > 3.6°
11 (50)
26 (89.7)
8.7 (2.02–37.26)
0.002
Number of concomitant diseases at admission*
2.4 ± 1.5
3.2 ± 2.5
1.20 (0.90–1.60)
0.18
Number of medication at admission*
4.2 ± 2.4
5.6 ± 3.8
1.15 (0.95–1.38)
0.12
MMSE score on the first day of delirium
18.1 ± 6.3
15.1 ± 6.0
0.92 (0.83–1.03)
0.13
¥DRS-R-98 score on the first day of delirium*
18.6 ± 6.4
20.6 ± 6.5
1.05 (0.96–1.15)
0.28
Data are presented as mean ± SD or (%) unless otherwise indicated.
*Continuous variables, °dichotomous variables. OR: odds ratio, the chance of developing prolonged delirium, CI: confidence interval. APACHE II: Acute Physiological and Chronic Health Evaluation II. IQCODE-N: Informant Questionnaire on Cognitive Decline in the Elderly, >3.6 indicates preexistent cognitive decline. DRS-R-98: Delirium Rating Scale Revised-98. Range 0 (severe cognitive impairment) to 30 (no cognitive impairment).
§Range 0 (no acute health problems) to 70 (severe acute health problems). △Range 0 (severe disability) to 20 (no disability). ≈Range 8 (no disability) to 31 (severe disability). †Range 0 (depression not likely) to 15 (depression very likely). ¥Range 0 (no delirium symptoms) to 39 (maximum severity).
