Table 2.

Loading all data for principal component 1 (P1) and 2 (P2), respectively, (cut-off 0.20)

Variable	Loading P1	Variable	Loading P2
NDIa, long-term	0.33	Segmental height, baseline	−0.35
Horizontal AROMb, baseline	−0.32	Hand strength, right, baseline	−0.33
NDI, short-term	0.31	Kyphosis, baseline	0.31
Hand strength, right baseline	−0.31	Hand strength, left, baseline	−0.30
Pain intensity, short-term	0.28	Sex	0.28
Pain intensity, long-term	0.26	Effect of surgery, long-term	−0.26
Sex	0.26	Expectations fulfilled, long-term	−0.26
NDI, baseline	0.24	Horizontal AROM baseline	−0.26
Effect of surgery, long-term	0.23	Number of levels operated on	−0.25
Hand strength, left	−0.23	Age	0.23
Expectations fulfilled, long-term	0.22

^aNeck Disability Index

^bActive range of motion