Logistic regression analysis of pathological features of bone metastasis in colorectal cancer and related influencing factors after surgery

Table 2 Single variables affecting the occurrence of postoperative bone metastases in patients undergoing colorectal cancer surgery, n (%)

Variables		Bone metastases (n = 44)	No bone metastases (n = 56)	t/χ2	P value
Age	≤ 60	24 (54.55)	36 (64.29)	0.974	0.324
	> 60	20 (45.45)	20 (42.86)
Sex	Male	24 (54.55)	40 (71.43)	3.048	0.081
	Female	20 (45.45)	16 (28.57)
The primary location of the tumor	Colon	11 (25.00)	30 (53.57)	8.315	0.004
	Rectum	33 (75.00)	26 (46.43)
Tumor diameter	< 5 cm	31 (70.45)	34 (60.71)	1.028	0.311
	≥ 5 cm	13 (29.55)	22 (39.29)
Osteopathic changes	Osteolytic	19 (43.18)	15 (26.79)	2.985	0.225
	Osteogenic	14 (31.82)	22 (39.29)
	Mixed bone destruction	11 (25.00)	19 (33.93)
Infiltration depth	T1-T2	14 (31.82)	27 (48.21)	2.738	0.098
	T3-T4	30 (68.18)	29 (51.79)
Postoperative chemotherapy	Yes	11 (25.00)	45 (80.36)	30.644	< 0.001
	No	33 (75.00)	11 (19.64)
Combined lung metastases	Yes	26 (59.09)	18 (32.14)	7.262	0.007
	No	18 (40.91)	38 (67.86)
Concomitant liver metastasis	Yes	11 (25.00)	24 (42.86)	3.454	0.063
	No	33 (75.00)	32 (57.14)
Concomitant pancreatic metastasis	Yes	7 (15.91)	11 (19.64)	0.233	0.630
	No	37 (84.09)	45 (80.36)
Lymph node involvement	Yes	29 (65.91)	19 (33.93)	10.096	0.002
	No	15 (34.09)	37 (66.07)