Table 2 Characteristics of patients with and without low respiratory tract samples
From: Community-acquired polymicrobial pneumonia in the intensive care unit: aetiology and prognosis
Characteristic | With samples (n= 86) | Without samples (n= 276) | P value |
|---|---|---|---|
Age (years) | 64.4 ± 16.7 | 63.0 ± 16.4 | 0.39 |
Sex (male) | 63 (73.3%) | 169 (61.2%) | |
Age ≥ 65 years | 47 (54.7) | 149 (54) | 0.91 |
Pneumonia severity index | 0.049 | ||
I to III | 13 (15.3%) | 83 (31.2%) | |
IV | 26 (30.6%) | 103 (38.7%) | |
V | 46(54.1%) | 80 (30.1%) | |
Bacteraemia | 18 (21.4%) | 45 (17.4%) | 0.40 |
Multilobar infiltration | 46 (53.5%) | 113 (40.9%) | 0.041 |
Severe community-acquired pneumonia | 66 (83.5%) | 135 (59.2%) | 0.001 |
Mechanical ventilation | 60(81.1%) | 75 (32.1%) | 0.001 |
ARDS criteria | 17 (19.8%) | 9 (33.3%) | 0.001 |
Septic shock | 30 (34.9%) | 42 (15.3%) | 0.001 |
Length of hospital stay (days) | 24.7 (20.7) | 12.8 (10.5) | < 0.001 |
Thirty-day mortality | 19 (22.1%) | 18 (6.5%) | 0.001 |
Aetiology | 60(70%) | 136 (49%) | 0.002 |
Streptococcus pneumoniae | 29 (48.3%) | 93 (68.4%) | |
Staphylococcus aureus | 3 (5%) | 4 (2.9%) | |
MRSA | 8 (13.3%) | 6 (4.4%) | |
Legionella pneumophila | 1 (1.7%) | 10 (7.4%) | |
Chlamydophila pneumophila | 1 (1.7%) | 5 (3.7%) | |
Haemophilus influenzae | 5 (8.3%) | 3 (2.2%) | |
Virus | 10 (16.7%) | 21(15.4%) | |
Coxiella burnetii | 1 (1.7%) | 2 (1.5%) | |
Streptococcus viridans | 1 (1.7%) | 0 | |
Mycoplasma pneumoniae | 4 (6.7%) | 2 (1.5%) | |
Pseudomonas aeruginosa | 7 (11.7%) | 7 (5.1%) | |
Gram-negative enteric bacilli | 5 (8.3%) | 5 (3.7%) |