Kinematics of fast cervical rotations in persons with chronic neck pain: a cross-sectional and reliability study

Table 4 Mean and SD values, and sensitivity and specificity obtained from linear discriminant analyses

Variables	Group	Values	Sensitivity	Specificity
Peak Speed (degrees/s)	CON	348 ± 92**	74.6%	73.5%
	NS	226 ± 88
ROM (degrees)	CON	61.5 ± 8.3**	64.4%	71.4%
	NS	52.7 ± 9.2
NPA	CON	2.33 ± 0.20	59.3%	36.7%
	NS	2.34 ± 0.19
AD-ratio	CON	0.81 ± 0.24	61.0%	49.0%
	NS	0.74 ± 0.22
SID (%)	CON	13.7 ± 4.7**	58.5%	69.4%
	NS	18.1 ± 6.5
CM (a.u.)	CON	14.5 ± 4.5**	53.4%	69.4%
	NS	17.6 ± 5.9

Group (NS-CON) was used as grouping variable in the linear discriminant analyses, separate for each kinematic variable. NS: non-specific neck pain group, sample-1 and -2 pooled together (n = 118); CON: healthy control group, sample-1 and -2 pooled together (n = 49); ROM: Range of movement; NPA: Normalized peak speed amplitude; AD-ratio: Acceleration-deceleration ratio; SID: Speed index of deviation; CM: Conjunct movements; a.u: Arbitrary units. ** p < 0.01 (t-tests).

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