Table 1.

Univariate analysis of risk factors of DVT.

Clinical risk factors	DVT group		Control group
	n	%	n	%	t or χ2	p
Age (years)					0.494	0.781
<41	19	17.9	18	17.0
41–61	69	65.1	66	62.3
≥61	18	17.0	22	20.8
Other conditions
hypertension	25	23.6	9	8.5	8.968	0.003
Diabetes	23	21.7	7	6.6	9.940	0.002
History of thrombosis	4	3.8	0	0	4.077	0.043
Type of tumor					1.354	0.716
Cervical cancer	51	48.1	52	49.1
Endometrial cancer	14	13.2	17	16.0
Ovarian cancer	38	35.8	36	34.0
Others	3	2.8	1	0.9
Staging of the tumor					16.926	0.001
I–II	41	38.7	64	60.4
III	42	39.6	37	34.9
IV	23	21.7	5	4.7
Treatment of the tumor					3.289	0.193
Simple surgery	21	19.8	18	17.0
Surgery + radi-otherapy/chemotherapy	42	39.6	55	50.0
Radiotherapy/chemotherapy	43	40.6	33	33.0
Transfusion	43	40.6	29	27.4	4.122	0.042
Central venous catheter	66	62.3	62	58.5	0.315	0.574
Hematological indicators
WBC count (109/L)					10.841	0.001
<10	79	74.5	97	91.5
≥10	27	15.1	9	4.7
Platelet count (109/L)					9.989	0.002
<300	43	40.6	66	62.3
≥300	63	55.6	40	35.8
PT (seconds)					10.203	0.001
<14	86	81.1	10	95.3
≥14	20	18.9	5	4.7
FIB (g/L)					23.016	<0.001
<4	54	50.9	87	82.1
≥4	52	7.6	19	1.9
Types of operation					3.558	0.059
Laparotomy	52		50
Laparoscopy	11		23
Operation time (minutes)	307 ± 76		276 ± 73		2.453	0.015
Blood loss (mL)	408 ± 269		304 ± 171		2.760	0.007
Transfusion (n)	29		20		5.095	0.024
Vascular injury (n)	2		1		0.511	0.475

Values are mean  ±  standard deviation or n (%). DVT: deep vein thrombosis; WBC: white blood cell; PT: prothrombin time; FIB: fibrinogen.