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Table 3 Selected characteristics according to normal and abnormal chest radiograph

From: Population-based cohort study of outpatients with pneumonia: rationale, design and baseline characteristics

Characteristic Normal Chest Radiograph (N = 1503) Abnormal Chest Radiograph (N = 1683) p-value
  Mean ± SD or No. (%)  
Death within 30 days 8 (0.5 %) 27 (2 %) 0.004
Hospitalization within 30 days 108 (7 %) 141 (8 %) 0.21
ER revisit within 30 days 385 (26 %) 409 (24 %) 0.39
Age, yr. 52 ± 20 51 ± 20 0.04
Age, yr.    
 <65 1049 (70 %) 1229 (73 %) 0.04
 ≥65 454 (30 %) 454 (27 %)
Male 801 (53 %) 893 (53 %) 0.90
Nursing Home 60 (4 %) 74 (4 %) 0.57
PSI continuous 54 ± 28 55 ± 30 0.14
PSI Risk Class 251 (17 %) 240 (14 %) 0.04
 Class I 862 (57 %) 996 (59 %)
 Class II 222 (14 %) 240 (14 %)
 Class III 153 (10 %) 171 (10 %)
 Class IV 15 (1 %) 36 (2 %)
 Class V   
Comorbidities
 Diabetes 125 (8 %) 107 (6 %) 0.03
 Cardiovascular Disease 267 (18 %) 256 (15 %) 0.05
 Malignancy 67 (4 %) 101 (6 %) 0.05
 Chronic Kidney Disease 29 (2 %) 40 (2 %) 0.39
 COPD 125 (8 %) 135 (8 %) 0.76
Functional Status    0.30
 Independent Mobility 1433 (95 %) 1591 (95 %)
 Impaired Mobility 70 (5 %) 92 (5 %)
Influenza vaccination 35 (2 %) 48 (3 %) 0.35
Pneumococcal vaccination 32 (2 %) 47 (3 %) 0.23