Table 1. Baseline characteristics of rheumatoid arthritis patients with or without cervical spine deformity at 10-year follow-up.

Baseline characteristics	Cervical spine deformity at 10-year follow-up (n=108)	No cervical spine deformity at 10-year follow-up (n=164)
Mean age (±SD)	55.2 (±12.7)	50.6 (±11.2)
Female, n (%)	65 (60)	117 (71)
Mean DAS44 (±SD)	4.39 (±0.89)	4.34 (±0.86)
Mean HAQ score (±SD)	1.22 (±0.66)	1.36 (±0.63)
RF-positive, n (%)	74 (69)	112 (68)
ACPA-positive, n (%)	73 (68)	104 (63)

ACPAanti-citrullinated protein antibodiesDAS44Disease activity scoreHAQHealth Assessment QuestionnaireRFrheumatoid factor