Identification and Functional Analysis of EPOR⁺ Tumor-Associated Macrophages in Human Osteosarcoma Lung Metastasis

Table 1

Association between the percentage of CD163⁺EPOR⁺ TAMs variables and clinical pathological properties of patients with osteosarcoma lung metastasis in this study ().

Characteristics	CD163^+EPOR^+ TAMs			value
	≥2.5	<2.5
Age (years)
<25	57	21
≥25	22	6	0.328	0.567
Gender
Male	52	18
Female	27	9	0.006	0.936
Location of primary tumor
Femur and tibia	73	22
Other	6	5	2.582	0.108
Size of primary tumor (cm)
≥5	40	13
<5	39	14	0.05	0.824
The number of lung metastases
Multiple	48	10
Single	31	17	4.57	0.033
Maximal diameter of lung metastases
≥5	63	5
<5	16	22	32.803	0.000
Pathologic grade
Well to moderately	13	19
Poorly to undifferentiated	66	8	27.754	0.000
Anemia
Yes	73	5
No	6	22	56.516	0.000