Table 6.

The result of logistic and linear regression analyses in THA

	Transfusion		PLOS
	OR (95% CI)	P	B (95% CI)	P	B′
Crude model	1.645 (1.410–1.920)	0.000	0.927 (0.734–1.111)	0.000	0.123
Model 1	1.657 (1.420–1.935)	0.000	0.935 (0.753–1.117)	0.000	0.123
Model 2	1.690 (1.445–1.978)	0.000	0.931 (0.750–1.112)	0.000	0.122
Model 3	1.872 (1.588–2.207)	0.000	0.973 (0.695–1.051)	0.000	0.115

PLOS postoperative length of stay

Model 1: controlled for age, gender, body mass index, MI, and diagnoses

Model 2: controlled for model 1 + hypertension, type 2 diabetes, chronic obstructive pulmonary disease, coronary heart disease, preoperative analgesic use, hemoglobin, and albumin

Model 3: controlled for model 2 + method of anesthesia, American Society of Anesthesiologists class, operative time, intraoperative bleeding, and tranexamic acid