The association of rod curvature with postoperative outcomes in patients undergoing posterior lumbar interbody fusion for spinal stenosis: a retrospective case–control study

Table 2 Multivariate stepwise logistic regression analysis of characteristics on surgical effects between abnormal and normal groups

	Estimate	Standard Error	Wald χ²	P	OR (95% CI)
Intercept	1.33	1.54	0.75	0.3863
Age	-0.07	0.03	5.53	0.0187	0.94(0.89–0.99)
RC	0.30	0.06	25.92	< .0001	1.35(1.20–1.51)
PTA	-0.10	0.03	10.13	0.0015	0.91(0.85–0.96)

Abbreviation: RC Rod curvature, PTA Posterior tangent angle of fused segments
^aBaseline patient characteristics, such as Age, Gender, Height, Weight, Number of Fused Levels, Surgical Time, Blood Loss, Hospital Stay, LL (lumbar Lordosis), PI-LL (the difference between PI and LL), Cobb (Cobb angle of fused segments), RC (rod curvature) and PTA (Posterior tangent angle of fused segments), were included in the initial logistic model in which both the significance level for entry and the significance level for staying were set to 0.1

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