Journal of Orthopaedic Surgery and Research

Table 5 Correlation analyses between the three pain assessment methods (PD, VAS, and BP) using the Spearman's rank correlation coefficient test

From: Efficacy of the PainVision apparatus for assessment of axial neck pain after cervical laminoplasty: a prospective study

PD vs VAS	PD Preop	PD 3 months	PD 6 months	PD 12 months	PD 18 months	PD 24 months
VAS Preop	r = 0.61 p < 0.001
VAS 3 months		r = 0.63 p < 0.001
VAS 6 months			r = 0.63 p < 0.001
VAS 12 months				r = 0.79 p < 0.001
VAS 18 months					r = 0.84 p < 0.001
VAS 24 months						r = 0.85 p < 0.001

PD vs BP	PD Preop	PD 3 months	PD 6 months	PD 12 months	PD 18 months	PD 24 months
BP Preop	r = − 0.21 p = 0.02
BP 3 months		r = − 0.40 p < 0.001
BP 6 months			r = − 0.38 p < 0.001
BP 12 months				r = − 0.37 p < 0.001
BP 18 months					r = − 0.32 p = 0.001
BP 24 months						r = − 0.30 p = 0.002

VAS vs BP	VAS Preop	VAS 3 months	VAS 6 months	VAS 12 months	VAS 18 months	VAS 24 months
BP Preop	r = − 0.29 p = 0.001
BP 3 months		r = − 0.45 p < 0.001
BP 6 months			r = − 0.47 p < 0.001
BP 12 months				r = − 0.42 p < 0.001
BP 18 months					r = − 0.34 p < 0.001
BP 24 months						r = − 0.42 p < 0.001

Correlation analyses revealed significant positive correlations between PD and VAS at each time point (all p < 0.001), as well as significant negative correlations between PD and BP (all p < 0.05) and significant negative correlations between VAS and BP at each time point (all p < 0.01)
Preop., preoperatively; PD, pain degree; VAS, visual analog scale; BP, bodily pain

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ISSN: 1749-799X

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