Table 1 Baseline data of cases suspected of having a local pulmonary infection
Characteristics | Pulmonary infectious disease with a definite pathogen (N = 49) | Pulmonary infectious disease with suspicion of infection with no identified pathogen (N = 27) | Non-infectious pulmonary diseases (N = 30) |
|---|---|---|---|
Gender, N (%) | |||
 Male | 36 (73.5) | 20 (74.1) | 20 (66.7) |
 Female | 13 (26.5) | 7 (25.9) | 10 (33.3) |
Age (years) | 60 (46,65) | 61 (50,71) | 61 (50,71) |
Symptom, N (%) | |||
 Cough | 35 (71.4) | 20 (74.1) | 21 (70.0) |
 Expectoration | 25 (51.0) | 17 (63.0) | 13 (43.3) |
 Hemoptysis | 12 (24.5) | 5 (18.5) | 3 (10.0) |
 Dyspnea | 7 (14.3) | 3 (11.1) | 10 (33.3) |
 Fever | 14 (28.6) | 9 (33.3) | 6 (20.0) |
 Chest pain | 13 (26.5) | 3 (11.1) | 7 (23.3) |
 Other symptoms | 5 (10.2) | 3 (11.1) | 5 (16.7) |
 Asymptomatic | 5 (10.2) | 2 (7.4) | 3 (10.0) |
Symptom duration before admission (days) | |||
 ≤ 1 month, N (%) | 27 (55.1) | 16 (59.3) | 17 (56.7) |
 > 1 month, ≤ 3 months, N (%) | 7 (14.3) | 4 (14.8) | 5 (16.7) |
 > 3 months, ≤ 1 year, N (%) | 10 (20.4) | 4 (14.8) | 4 (13.3) |
 > 1 year, N (%) | 5 (10.2) | 3 (11.1) | 4 (13.3) |
Underlying disease, N (%) | |||
 Hypertension | 15 (30.6) | 9 (33.3) | 10 (33.3) |
 Diabetes mellitus | 8 (16.3) | 7 (25.9) | 7 (23.3) |
 Malignant tumor | 1 (2.0) | 2 (7.4) | 4 (13.3) |
 Immunosuppressive status | 7 (14.3) | 3 (11.1) | 4 (13.3) |
 Other diseases | 2 (4.1) | 2 (7.4) | 1 (3.3) |
 No underlying disease, N (%) | 29 (59.2) | 15 (55.6) | 15 (50.0) |
Laboratory examination | |||
 White blood cell count (× 109/L) | 7.5 (5.7,12.0) | 8.7 (6.1,12.7) | 8.7 (6.4,10.6) |
 Percentage of neutrophils (%) | 67.7 (59.2,76.1) | 69.8 (64.5,84.2) | 68.9 (63.0,78.4) |
 Percentage of lymphocytes (%) | 22.1 (11.6,30.3) | 20.3 (9.2,24.3) | 16.7 (10.1,25.1) |
Lobes of the lungs involved, N (%) | |||
 Single lobe | 20 (40.8) | 9 (33.3) | 5 (16.7) |
 Multi lobes | 29 (59.2) | 18 (66.7) | 25 (83.3) |
Imaging features, N (%) | |||
 Consolidation | 16 (32.7) | 9 (33.3) | 11 (36.7) |
 Nodule or mass | 38 (77.6) | 21 (77.8) | 25 (83.3) |
 Cavity | 12 (24.5) | 5 (18.5) | 8 (26.7) |
 Necrosis | 14 (28.6) | 5 (18.5) | 4 (13.3) |
 Interstitial lesion | 2 (4.1) | 0 | 2 (6.7) |
 Pleural effusion | 11 (22.4) | 4 (14.8) | 8 (26.7) |
 Mediastinal lymph node enlargement | 14 (28.6) | 4 (14.8) | 12 (40.0) |