Table 1.

Comparison of relative factors between the non-infectious fever group and the control group after total knee arthroplasty.

Characteristic	The non-infectious fever group (N = 57)	The control group (N = 89)	Statistics	P-value
Gender (male/female)	9/48	23/66	2.052	0.152
Age	66.36 ± 8.64	66.93 ± 9.09	−0.373	0.710
Hypertension	30	44	0.142	0.707
Diabetes	9	16	0.117	0.732
Operation duration (min)	193.95 ± 45.264	196.01 ± 41.678	−0.282	0.778
Intraoperative blood loss (ml)	363.33 (200, 500)	270.78 (150, 400)	−2.780	0.005 *
Postoperative drainage fluid volume (ml)	259.73 (100, 280)	151.30 (80, 170)	−4.822	0.001 *
Blood transfusion	32 (56.14%)	37 (30.33%)	2.958	0.085
Frequency of blood transfusion (≥2)	12 (21.05%)	5 (5.61%)	8.046	0.005 *
Duration of antibiotic use (day)	8.87 (4, 9)	5.52 (4, 7.5)	−2.429	0.015 *
Total length of hospital stay (day)	26.12 ± 9.517	23.34 ± 6.635	2.075	0.04 *

^*Significant at α level P <0.05.