Table 1 Clinical characteristics and statistical results of PJP and Non-PJP other types of pneumonia

Basic Diseases

 Hematologic Malignancies

27 (46.55%)

15 (25.86%)

0.003

 Organ Transplantation

17 (29.31%)

5 (8.62%)

0.008

 Bone Marrow Transplantation

7 (12.07%)

5 (8.62%)

0.762

 Immune Disorders

27 (46.55%)

8 (13.79%)

< 0.001

 Respiratory Failure

16 (27.59%)

3 (5.17%)

0.002

 Hypertension

22 (37.93%)

14 (24.14%)

0.16

 Chronic Kidney Disease

26 (44.83%)

14 (24.14%)

0.031

 Chronic obstructive pulmonary disease (COPD)

8 (13.79%)

7 (12.07%)

0.782

 Low Serum Protein

26 (44.83%)

15 (25.86%)

0.033

Medical History

 Mixed Infection

27 (46.55%)

13 (22.41%)

0.011

 Use of Immunosuppressive Agents

42 (72.41%)

20 (34.48%)

 < 0.001

 Long-term use of corticosteroids

36 (62.07%)

8 (13.79%)

 < 0.001

 1 year with ≥ 2 hospitalizations

43 (74.14%)

33 (56.90%)

0.078

 Mechanical Ventilation

36 (62.07%)

32 (55.17%)

0.572

 Surgical History

34 (58.62%)

20 (34.48%)

0.015

 Radiation and Chemotherapy

24 (41.38%)

15 (25.86%)

0.115

Clinical Symptoms

 Fever (≥ 38℃)

22 (37.93%)

15 (25.86%)

0.232

Laboratory Tests

 Elevated Neutrophil Count

22 (37.93%)

20 (34.48%)

0.847

 Decreased Lymphocyte Count

44 (75.86%)

25 (43.10%)

0.001

 Elevated CRP

56 (96.55%)

45 (77.59%)

0.004

 Elevated procalcitonin

44 (75.86%)

21 (36.21%)

 < 0.001

 Elevated LDH

27 (46.55%)

14 (24.14%)

 < 0.001

 CD4⁺ T < 200 pcs/μL

19 (32.76%)

2 (3.45%)

 < 0.001

 PJP PCR Positive

51 (87.93%)

19 (32.76%)

 < 0.001

Chest CT Imaging

 Ground-glass opacity

30 (51.72%)

9 (15.52%)

 < 0.001

 Consolidation

16 (27.59%)

11 (18.97%)

0.272

 Enlarged mediastinal lymph nodes

23 (39.66%)

12 (20.69%)

0.042

 Pleural Effusion

22 (37.93%)

9 (15.52%)

0.011

 Nodules

38 (65.52%)

45 (77.59%)

0.217

 Fibrous Strands Opacity

32 (55.17%)

25 (43.10%)

0.265