Risk Factors of Total Blood Loss and Hidden Blood Loss in Patients with Adolescent Idiopathic Scoliosis: A Retrospective Study

Table 3

Multiple linear regression analysis of risk factors of TBL.

Parameters	Unstandardized		Standardized beta			95% CI
	B	SE
Operative time (min)	1.644	0.543	0.343	3.026	0.003	0.567	2.721
PLTpost (10^9/L)	-0.363	0.493	-0.048	-0.736	0.463	-1.341	0.615
The number of surgical fixation segments	89.647	35.733	0.407	2.509	0.014	18.802	160.491
The number of pedicle screws	6.437	18.661	0.050	0.345	0.731	-30.559	43.434
Hospital stay	8.231	18.543	0.028	0.444	0.658	-28.531	44.994
Type of scoliosis	17.76	19.889	0.059	0.893	0.374	-21.671	57.191
Correction angle (°)	0.529	2.977	0.012	0.178	0.859	-5.374	6.432

indicates a risk factor of TBL (). PLT_post: postoperative platelets.