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Table 5 Clinical evolution and outcomes of patients with community-acquired pneumonia according to etiologic categories (N° = 390)

From: Etiology of community-acquired pneumonia in a population-based study: Link between etiology and patients characteristics, process-of-care, clinical evolution and outcomes

Clinical evolution and outcomes Conventional Bacteria (N = 163) Atypical Agents (N = 151) Virus (N = 41) Mixed Infection (N = 35) Pvalue
Clinical evolution      
Treatment failure 15 (9.2) 8 (5.3) 0 (0) 1 (2.9) 0.1
Severe sepsis 71 (43.8) 22 (14.6) 6 (14.6) 6 (17.1) <0.0001
Septic shock 8 (4.9) 1 (0.7) 0 (0) 0 (0) 0.04
Hospitalized 123 (75.5) 39 (25.8) 13 (31.7) 21 (60) <0.0001
Admission to intensive care unit 14 (8.6) 1 (0.7) 0 (0) 0 (0) 0.0007
Use of mechanical ventilation 2 (1.2) 1 (0.7) 0 (0) 0 (0) 0.8
Outcomes      
Mortality within 30 days 7 (4.3) 2 (1.3) 0 (0) 0 (0) 0.2
In-hospital mortality* 5 (4.1) 2 (5.1) 0 (0) 0 (0) 0.7
Readmission within 30 days* 10 (8.1) 2 (5.1) 0 (0) 2 (9.5) 0.7
Length of hospital stay* (days)      
Mean (SD) 3.9 (3.1) 3 (2.7) 2.9 (2) 2.9 (2.4) 0.05
>3 57 (48.3) 8 (21.6) 4 (30.8) 5 (23.8) 0.01
Return to daily activity, mean (SD),days 19.5 (9.1) 19.6 (11) 21.6 (11.5) 17.8 (11.1) 0.3
Subsequent hospitalization 1 (2.6) 3 (2.7) 1 (3.6) 1 (7.1) 0.8
  1. SD = standard deviation.
  2. Data are presented as numbers (percentage) of patients unless otherwise stated. Percentages exclude patients with missing data. Treatment failure, septic shock, and severe sepsis are defined in text.
  3. * Only for hospitalized patients.
  4. Inhospital deaths are excluded.
  5. Only for ambulatory patients.
  6. The p-value obtained from the Chi-square or Fisher exact test for categorical variables, and Kruskal-Wallis test for continuous variables.