Table 6

Factors associated with undetected delirium (Characteristics of residents).

Variables

T1 (N = 109)


Delirium detected [missing values]

Odds Ratio [90% CI]


No n = 95 (87.2%)

Yes n = 14 (12.8%)


Age

≥ 85

66 (69.5%)

5 (35.7%)

4.1 [1.5–11.0]1

≤ 84

29 (30.5%)

9 (64.3%)

1.0

Sex

Male

22 (23.2%)

6 (42.9%)

2.5 [0.9–6.6]

Female

73 (76.8%)

8 (57.1%)

1.0

Severity of dementia (HDS)

Severe

45 (47.4%)

7 (50.0%)

1.8 [0.6–5.2]

Moderate

32 (33.7%)

2 (14.3%)

4.4 [1.0–19.1]2

Mild

18 (19.0%)

5 (35.7%)

1.0

Behavioural problems (NHBPS)

[2]

Yes

44 (47.3%)

8 (57.1%)

0.7 [0.3–1.7]

Functional autonomy (SMAF)

≥ 41

48 (50.5%)

5 (35.7%)

0.6 [0.1–3.6]

29,1–40

30 (31.6%)

8 (57.1%)

0.2 [0.0–1.4]

0–29

17 (17.9%)

1 (7.1%)

1.0

Number of medications

≥ 10

37 (38.9%)

5 (35.7%)

1.7 [0.5–5.2]

6–9

36 (37.9%)

4 (28.6%)

2.0 [0.6–6.7]

≤ 5

22 (23.2%)

5 (37.7%)

1.0

Pain (Doloplus – II) Yes(≥ 5)

40 (42.1%)

8 (57.1%)

0.5 [0.2–1.4]

Depression (Cornell Scale) Yes (≥ 6)

26 (27.3%)

4 (28.6%)

0.9 [0.3–2.7]

Sleep problems Yes (≥ 8)

10 (10.5%)

1 (7.1%)

1.5 [0.3–9.2]

Visual impairment Yes

20 (21.1%)

2 (14.3%)

1.6 [0.4–6.0]

Hearing impairment Yes

13 (13.7%)

3 (21.4%)

0.6 [0.2–1.9]

Dehydration Yes (≤ 500 ml)

33 (34.7%)

6 (42.9%)

0.7 [0.3–1.8]

Weight loss

[10]

[2]

Yes (≥ 3 kg)

16 (18.8%)

3 (25.0%)

1.4 [0.4–4.7]

Brachial perimeter

[1]

Abnormal (≤ 21 cm)

15 (15.8%)

2 (15.4%)

1.0 [0.3–4.0]

Comorbidity (CCI) Severe (≥ 8)

36 (37.9%)

3 (21.4%)

2.2 [0.7–6.9]

Geriatric fever

[7]

[2]

Yes (T° rectal : ≥ 37,5 ; T° oral : ≥ 37,2)

9 (10.2%)

1 (8.3%)

1.3 [0.2–7.7]

Oxygen saturation

[10]

[2]

Abnormal (<95%)

26 (30.6%)

5 (41.7%)

0.6 [0.2–1.7]


1 Statistically significant p < 0.1

2 The "moderate" category of dementia severity was weakly associated with undetected delirium. However, considering the significance level chosen (0.1) and that the variable "severity of dementia" as a whole was not statistically significant (p = 0.24), it was decided not to consider this association as clinically important.

Voyer et al. BMC Nursing 2008 7:4   doi:10.1186/1472-6955-7-4

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