Effect of vertebral rotation on adjacent segment degeneration after the early stage of lumbar fusion surgery

BMC Surgery

Table 1 Effect of reducing postoperative IV rotation on rASD

			rASD	N-rASD	Ratio	P
Total	Reduced		8	33	19.5%	0.004^*
Total	Not reduced		33	37	47.1%	0.004^*
Total	Fused to S1	Reduced	2	14	12.5%	0.004^*
	Fused to S1	Not reduced	12	8	60%	0.004^*
	No fused to S1	Reduced	6	19	24%	0.125
	No fused to S1	Not reduced	21	29	42%	0.125
Single level	Reduced		4	25	13.8%	0.048^*
Single level	Not reduced		14	26	35.0%	0.048^*
≥ 2 levels	Reduced		4	8	33.3%	0.078
≥ 2 levels	Not reduced		19	11	63.3%	0.078

ISSN: 1471-2482