Prognostic factors in hospitalized community-acquired pneumonia: a retrospective study of a prospective observational cohort

Table 1 Characteristics of patients with community-acquired pneumonia

	n (%)
All patients	1834
Male	1281 (69.8)
Age (y)	73.5 ± 14.3
Smoking status ^a
Current	292 (15.9)
Past	850 (46.3)
Never	692 (37.7)
Comorbidity
Chronic heart disease	554 (30.2)
COPD^b	440 (24.0)
Diabetes mellitus	364 (19.8)
Cerebrovascular disease	354 (19.3)
Malignancy^c	167 (9.1)
Chronic kidney disease	136 (7.4)
Chronic liver disease	111 (6.1)
Bacteremia	93 (5.1)
Duration of hospitalization (days)	15.4 ± 12.7
ICU admission	95 (5.2)
A-DROP (score)
0	206 (11.2)
1	486 (26.5)
2	575 (31.4)
3	426 (23.2)
4	126 (6.9)
5	15 (0.8)
CURB-65 (score)
0	193 (10.5)
1	554 (30.2)
2	634 (34.6)
3	329 (17.9)
4	106 (5.8)
5	18 (1.0)
PSI (score)	103.4 ± 34.2
PSI (class)
I	37 (2.0)
II	211 (11.5)
III	456 (24.9)
IV	799 (43.6)
V	331 (18.0)
IDSA/ATS severe criteria
Yes	585 (31.9)
No	1249 (68.1)
In-hospital mortality	132 (7.2)
30-day mortality	122(6.7)

Data are presented as mean ± SD or n (%)
Abbreviations: A-DROP age ≥70 years in men or age ≥75 years in women, blood urea nitrogen ≥21 mg · dL⁻¹ or dehydration, oxyhemoglobin saturation measured by pulse oximetry ≤90% or partial pressure of oxygen in arterial blood ≤60 mmHg, confusion or systolic blood pressure ≤90 mmHg, ATS American Thoracic Society, COPD chronic obstructive pulmonary disease, CURB-65 confusion, urea >7 mmol/L, respiratory rate ≥30 breaths/min, low blood pressure (systolic <90 mmHg or diastolic ≤60 mmHg), and age ≥65 years, ICU intensive care unit, IDSA Infectious Diseases Society of America, PSI Pneumonia Severity Index
^aCurrent: Patients who are current smokers and have been smoking more than 100 cigarettes in their entire life, Past: Patients who quit smoking more than a month ago and have been smoking more than 100 cigarettes in their entire life, Never: Patients who have not smoked in the past month and have not smoked more than 100 cigarettes in their entire life
^bWe diagnosed COPD using the GOLD definition [6]. Patients who were already diagnosed and treated as COPD in other hospitals and had emphysema on chest tomography were also included
^cThis included malignant disease that was active at the time of admission or was diagnosed within one year of admission

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