Association between perioperative blood transfusion and length of hospital stay in patients with osteoporotic fractures

Table 4 Threshold effect analysis examining the relationship between Perioperative blood transfusion and LOS

	Model II^a
	LOS
	β (95%CI)	P-value
Model A^b
One line slope	0.2 (0.0, 0.3)	0.035
Model B^c
Perioperative blood transfusion turning point (K)	1.5
<K	-1.4 (-2.1, -0.7)	< 0.001
>K	0.6 (0.4, 0.9)	< 0.001
Slope 2 – Slope 1	2.0 (1.1, 2.9)	< 0.001
LRT^d	< 0.001

^aAdjusted for AGE; BMI; Gender; Hemoglobin; Primary diagnosis; ASA; Cr; Anesthesia; surgical method; CCI.
^bLinear analysis, P-value < 0.05 indicates a linear relationship
^cNon-linear analysis
^dP-value < 0.05 means Model B is significantly different from Model A, which indicates a non-linear relationship
Abbreviations: CI, confidence interval; OR, odds ratio; LOS, length of hospital stay; LRT, logarithmic likelihood ratio test

ISSN: 1471-2474