Relationship between the atlantodental interval and T1 slope after atlantoaxial fusion in patients with rheumatoid arthritis

Table 2 Multivariate logistic regression analysis of TI slope increase 1 year after atlantoaxial fusion for atlantoaxial instability in the patients with rheumatoid arthritis

	Multivariate logistic regression analysis
Variable	OR	95% CI	p-value
Sex
Female		Reference
Male	14.21	0.44–458.84	0.134
Age	0.97	0.93–1.02	0.215
Preoperative myelopathy	1.87	0.33–10.51	0.477
Preoperative VAS score	1.17	0.59–2.34	0.652
DSA28	0.92	0.41–2.08	0.841
Preoperative ADI
≤ 7.92 mm		Reference
> 7.92 mm	4.59	1.34–15.73	0.015
Preoperative Oc-C2 angle	1.00	0.94–1.06	0.985
Preoperative C2–C7 angle	0.93	0.84–1.02	0.107
Preoperative cSVA (C2–C7)	1.01	0.94–1.09	0.726

OR odds ratio, CI confidence interval, VAS visual analog scale, DAS28 disease activity score of 28 joints, ADI atlantodental interval, Oc-C2 occipito-C2, cSVA cervical sagittal vertical axis

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