Table 1.

Preoperative demographics and clinical characteristics

	All	Neck pain (+)	Neck pain (–)	p
No	93	29	64
Male/Female	60/33	19/10	41/23	0.542
Age (years)	72.6±8.7	72.4±8.6	72.6±8.8	0.914
Height (cm)	157.4±11.1	156.3±11.8	157.9±10.8	0.526
Weight (kg)	59.6±9.8	60.7±10.2	59.1±9.6	0.47
VAS	4.7±2.9	2.4±2.1	5.7±2.6	<0.001
Cervical ROM (degree)	35.8±14.3	37.1±15.8	35.3±13.6	0.572
CL (degree)	15.7±11.4	15.3±7.2	15.8±12.9	0.822
JOA score	11.7±2.6	12±2.4	11.6±2.6	0.464

Values are mean ± SD for each group.

VAS: visual analog scale

Cervical ROM: cervical range of motion

CL: cervical lordosis

JOA score: Japanese Orthopaedic Association score