Journal of Orthopaedic Surgery and Research

Table 3 Correlations between sagittal parameters and NDI scores

From: Analysis of a radiographic parameter K-line tilt following adjacent two-level anterior cervical discectomy and fusion: a retrospective study

	Sagittal parameters	Correlation (Spearman r)	p value
Preoperative NDI scores	Preoperative T1s	0.652	0.072
	Preoperative C2–7 lordosis	0.090	0.451
	Preoperative SA	-0.078	0.517
	Preoperative C2–7 SVA	0.639^*	0.011
	Preoperative K-line tilt	0.516^*	0.026
Follow-up NDI scores	Follow-up T1s	0.664^*	0.038
	Follow-up C2–7 lordosis	0.117	0.326
	Follow-up SA	-0.065	0.585
	Follow-up C2–7 SVA	0.756^**	0.004
	Follow-up K-line tilt	0.832^**	0.006

NDI neck disability index, T1s T1 slope, SA segment angle, SVA sagittal vertical axis
^*Correlation is significant at the p < 0.05 level (2-tailed)
^**Correlation is significant at the p < 0.01 level (2-tailed)

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ISSN: 1749-799X

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