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Table 1 Characteristics and outcomes of the study population.

From: Influence of socioeconomic status on community-acquired pneumonia outcomes in elderly patients requiring hospitalization: a multicenter observational study

  

Patients studied n

n

(%)

Sex: male

 

651

404

(62.1)

Age (years)

M (range)

651

77 (65-100)

 

High MFI

 

651

115

(17.7)

Social class

 

511

  
 

I

 

14

(2.7)

 

II

 

7

(1.4)

 

III

 

47

(9.2)

 

IVa

 

183

(35.8)

 

IVb

 

74

(14.5)

 

V

 

186

(36.4)

Educational level

≥secondary level

643

101

(15.7)

Living alone

 

651

77

(11.8)

Alcohol consumption

 

561

51

(9.1)

Smoker or ex-smoker

 

648

342

(52.8)

Admitting hospital

 

651

  
 

1

 

117

(18.0)

 

2

 

163

(25.0)

 

3

 

233

(35.8)

 

4

 

48

(7.4)

 

5

 

90

(13.8)

Underlying diseases

 

651

460

(70.7)

COPD

  

221

(33.9)

Diabetes mellitus

  

130

(20.0)

Solid or haematologic neoplasia

  

96

(14.8)

Disabling neurological disease

  

86

(13.2)

Heart failure

  

64

(9.8)

Aggressive therapy a

  

48

(7.4)

Liver disease

  

21

(3.2)

Other diseases b

  

29

(4.4)

Pneumonia Severity Index

 

589

  
 

Risk class 1

 

2

(0.3)

 

Risk class 2

 

39

(6.6)

 

Risk class 3

 

173

(29.4)

 

Risk class 4

 

286

(48.6)

 

Risk class 5

 

89

(15.1)

Combined antibiotic treatment

 

651

251

(38.6)

Bacteremic pneumonia

 

405

55

(13.6)

Empyema

 

651

17

(2.6)

Pneumonia outcomes

    

LOS (days):

M (range)

651

8 (1-95)

 

Mortality in the first 30 days

 

651

41

(6.3)

Readmission c

 

604

64

(10.6)

ICU admission

 

651

51

(7.8)

  1. Data are presented as n (%) or median (range).
  2. Abbreviations: COPD: Chronic obstructive pulmonary disease; ICU: Intensive Care Unit; LOS: length of stay; M: Median; MFI: Municipality Family Income.
  3. Notes: a Aggressive therapy: radiotherapy or corticosteroids therapy or immunosuppressive therapy.
  4. b Other diseases: Autoimmune disease or chronic renal failure in dialysis.
  5. c In order to evaluate readmission, deaths during hospitalization were excluded.