Skip to main content

Table 1 Characteristics of patients with atypical (AP) or non-atypical (NAP) pneumonia (frequencies with percentage, and means with standard deviations)

From: Accuracy of a score predicting the presence of an atypical pathogen in hospitalized patients with moderately severe community-acquired pneumonia

Variable AP (N = 31) NAP (N = 549) P-value
Age (years) 67 (17) 72 (16) 0.09
Gender (male) 19 (61) 314 (57) 0.65
Heart failure 11 (36) 105 (19) 0.03
Chronic obstructive pulmonary disease 5 (16) 117 (21) 0.49
Chronic liver disease 1 (3) 6 (1) 0.29
Active cancer 3 (10) 35 (6) 0.47
Chronic renal disease 5 (16) 83 (15) 0.88
Diabetes 3 (10) 93 (17) 0.29
Neurological disease 5 (16) 61 (11) 0.39
Alcohol abuse 5 (16) 54 (10) 0.26
Number of comorbidities
 0 12 (39) 217 (40)  
 1 8 (26) 177 (32) 0.63
  > 1 11 (36) 155 (28)  
Previous antibiotic treatment 0 26 (5) 0.22
Cough 24 (77) 457 (84) 0.38
Sputum 15 (48) 326 (60) 0.22
Chest pain 5 (17) 187 (34) 0.05
Dyspnea 22 (73) 383 (70) 0.70
Fever 24 (77) 370 (67) 0.25
Confusion 5 (16) 17 (3)  < 0.01
Temperature 38.2 (1.3) 37.9 (1.0) 0.03
Heart rate 99 (20) 98 (20) 0.85
Respiratory rate 25 (6) 24 (6) 0.64
Systolic blood pressure 135 (17) 133 (24) 0.64
Diastolic blood pressure 77 (11) 73 (14) 0.11
Hypoxemia (SpO2 < 90% on room air) 12 (40) 279 (52) 0.21
Focal signs on chest examination 24 (77) 461 (84) 0.33
Natremia (mmol/L) (N = 579) 133.4 (4) 135.9 (4)  < 0.01
Urea (mmol/L) (N = 569) 7.3 (4) 7.6 (5) 0.52
Glucose (mmol/L) (N = 565) 7.6 (2) 7.6 (3) 0.59
Leukocytes count (G/L) 11.5 (4.3) 13.6 (6.4) 0.09
Hematocrit (%) 39.3 (5) 39.2 (5) 0.88
Platelets count (G/L) 212.2 (89) 233.8 (97) 0.12
Procalcitonin (ug/L) (N = 540) 1.5 (3) 3.8 (14) 0.81
C-reactive protein (mg/ L) (N = 230) 265.6 (112) 180.4 (138)  < 0.01
Pleural effusion 6 (19) 91 (17) 0.69
Pneumonia Severity Index score 86.3 (24) 84.2 (25) 0.59
Season of inclusion    
 Winter 5 (16) 207 (38) 0.03
 Spring 6 (19) 123 (22)  
 Summer 5 (16) 76 (14)  
 Autumn 15 (48) 143 (26)  
  1. The p-values in bold letters are considered as significant and the ones underlined are inferior to 0.1 and are therefore also used for the multivariate analysis
  2. All data were available for all patients except when stated otherwise