Radiographic and clinical outcomes of C1-C2 intra-articular screw fixation in patients with atlantoaxial subluxation

Table 2 Clinical results

	Rheumatoid arthritis group (n = 32)	p value between before and after	Non-rheumatoid arthritis group (n = 22)	p value between before and after	p value between RA and non-RA
VAS
Before	62.56 ± 18.28 (30–90)	< 0.001*	56.60 ± 16.76 (30–76)	< 0.001*	0.3135
Final	5.76 ± 10.44 (0–45)	< 0.001*	5.00 ± 9.13 (0–36)	< 0.001*	0.8258
JOA score
Before	11.37 ± 3.78 (4–17)	< 0.001*	13.19 ± 3.45 (6–17)	< 0.001*	0.1521
Final	16.64 ± 0.79 (14–17)	< 0.001*	16.23 ± 1.30 (13–17)	< 0.001*	0.3224
Ranawat class	I, II, IIIa, IIIb		I, II, IIIa, IIIb
Before	4, 13, 12, 0	< 0.001*	6, 6, 8, 3	< 0.001*	0.8840
Final	22, 7, 0, 0	< 0.001*	19, 4, 0, 0	< 0.001*	0.8535

RA rheumatoid arthritis, VAS visual analogue scale, JOA Japan Orthopaedic Association
*Significant difference (p < 0.05)

ISSN: 1749-799X