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Table 3 Risk factors associated with increased odds of in-hospital mortality in elderly patients with bacteraemia (univariate analysis).

From: Predictors of in-hospital mortality in elderly patients with bacteraemia admitted to an Internal Medicine ward

 

Survived

n = 105

Died

n = 30

   
 

n

(%) c

n

(%) d

OR

(95%CI)

P

Gender:

       

Male

55

(52.4)

18

(60.0)

1.0 (reference group)

 

Female

50

(47.6)

12

(40.0)

0.733

(0.321-1.673)

0.460

Age:

       

65-74 yrs

23

(21.9)

8

(26.7)

0.755

(0.266-2.148)

0.097

75-84 yrs

54

(51.4)

9

(30.0)

0.326

(0.120-0.883)

 

≥ 85 yrs

28

(26.7)

13

(43.3)

1.0 (reference group)

 

Admission from:

       

   Home

74

(70.5)

21

(70.0)

0.977

(0.403-2.372)

0.960

   Nursing-home

31

(29.5)

9

(30.0)

1.0 (reference group)

 

Bedridden state

57

(54.3)

20

(66.7)

1.676

(0.695-4.045)

0.247

Length of hospital stay

13

(7-22)

12

(40.0)

NA

NA

0.760

Previous Hospital admissions

46

(43.8)

19

(63.3)

2.230

(0.943-5.275)

0.064

Appropiate antibiotic therapy

40

(38.1)

6

(20.0)

0.375

(0.139-1.010)

0.047

Comorbidities:

       

   Cardiovascular disease

17

(16.2)

7

(23.3)

1.553

(0.573-4.214)

0.571

   Pulmonary disease

15

(14.3)

5

(16.7)

1.181

(0.389-3.578)

0.774

   Chronic renal disease

11

(10.5)

8

(26.7)

3.082

(1.103-8.611)

0.037

   Cerebrovascular disease

48

(45.7)

10

(33.3)

0.570

(0.056-4.023)

0.198

   Hypertension

29

(27.6)

10

(33.3)

0.765

(0.331-1.765)

0.571

   Diabetes Mellitus

32

(30.5)

8

(26.7)

0.810

(0.324-2.024)

0.651

   Dyslipidemia

7

(6.7)

1

(3.3)

0.474

(0.056-4.023)

0.862

Source of Infection

       

   UTI

48

(45.7)

13

(43.3)

0.908

(0.401-2.057)

0.817

   LRI

41

(39.0)

7

(23.3)

0.475

(0.187-1.207)

0.113

   Skin ulcer infection

13

(12.4)

4

(13.3)

0.462

(0.127-1.679)

1.000

   Bacteraemiaa

3

(2.9)

4

(13.3)

1.071

(0.321-3.575)

0.045

   Miscellaneouse

7

(6.7)

2

(6.7)

1.000

(0.197-5.087)

1.000

Microorganism

       

   MRSA

13

(12.4)

8

(26.7)

2.549

(0.937-6.940)

0.085

   NMRSA

15

(14.3)

5

(16.7)

1.181

(0.389-3.578)

0.774

    Enterococcus faecalia

12

(11.4)

2

(6.7)

0.543

(0.114-2.579)

0.735

    E. coli

23

(21.9)

3

(10.0)

0.386

(0.107-1.393)

0.135

   K. pneumoniae

12

(11.4)

4

(13.3)

1.173

(0.348-3.957)

0.796

   P. aeruginosa

4

(3.8)

4

(13.3)

3.840

(0.897-16.438)

0.075

Physiologic presentation

       

Sepsis (SIRS + infection)

72

(68.6)

21

(70.0)

1.240

(0.376-4.086)

1.000

Functional status (ADL score ≥ 1)

76

(72.4)

26

(86.7)

2.737

(0.761-9.845)

0.111

Cognitive impairmentb

49

(46.7)

22

(73.3)

3.207

(1.256-8.188)

0.012

pO2 ≤ 59.65 mmHg

25

(23.8)

11

(36.7)

4.730

(1.361-16.444)

0.010

Albumin ≤ 3.05 g/dl

26

(24.8)

13

(43.3)

2.615

(1.072-6.380)

0.031

Temperature:

       

< 36°C

4

(3.8)

5

(16.7)

1.0 (reference group)

 

36-37.5°C

43

(41.0)

15

(50.0)

0.279

(0.066-1.178)

0.016

> 37.5aC

53

(50.5)

9

(30.0)

0.136

(0.031-0.604)

 
  1. a Bacteraemia without an identifiable source of infection
  2. b moderate to severe cognitive impairment defined as having a SPMSQ score > 4
  3. c, d percentage calculated on the basis of the total number of survivors and deaths, respectively
  4. e Including central nervous system, muscle and bone infection
  5. CI = Confident interval, LRI- Lower respiratory infection, UTI- Urinary tract infection, SIRS- systemic inflammatory response syndrome, NA- not available
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