Central Sensitivity Is Associated with Poor Recovery of Pain: Prediction, Cluster, and Decision Tree Analyses

Table 2

A preliminary Spearman's correlation matrix between all assessed questionnaire variables.

	SFMPQ-2 BL	SFMPQ-2 FU	ΔSFMPQ-2	CSI-9 BL	CSI-9 FU	ΔCSI-9	HADS-A BL	HADS-A FU	ΔHADS-A	HADS-D BL	HADS-D FU	ΔHADS-D	PCS-4 BL	PCS-4 FU	ΔPCS-4
SFMPQ-2 BL	1.00
SFMPQ-2 FU	0.42	1.00
ΔSFMPQ-2	−0.60	0.36	1
CSI-9 BL	0.59	0.49	−0.12	1
CSI-9 FU	0.30	0.61	0.23	0.56	1
ΔCSI-9	−0.28	0.15	0.42	−0.45	0.41	1
HADS-A BL	0.40	0.37	−0.07	0.48	0.23	−0.29	1
HADS-A FU	0.29	0.53	0.14	0.51	0.47	−0.07	0.60	1
ΔHADS-A	−0.13	0.14	0.22	−0.04	0.22	0.28	−0.52	0.30	1
HADS-D BL	0.18	−0.01	−0.18	−0.02	−0.04	0.03	0.15	0.19	−0.03	1
HADS-D FU	0.15	0.44	0.03	0.40	0.37	−0.02	0.35	0.59	0.22	0.55	1
ΔHADS-D	0.30	0.43	0.16	0.44	0.47	0.04	0.22	0.40	0.24	−0.38	0.49	1
PCS-4 BL	0.47	0.28	−0.22	0.37	0.36	−0.13	0.26	0.43	0.15	0.29	0.50	0.20	1
PCS-4 FU	0.46	0.61	0.02	0.55	0.68	0.03	0.40	0.52	0.16	−0.18	0.45	0.38	0.60	1
ΔPCS-4	−0.11	0.44	0.43	0.12	0.41	0.33	0.05	0.16	0.10	0.05	−0.003	0.18	−0.35	0.43	1

Abbreviations: SFMPQ-2, Short-Form McGill Pain Questionnaire-2; CSI-9, Central Sensitisation Inventory-9; HADS-A, Hospital Anxiety and Depression Scale-Anxiety; HADS-D, Hospital Anxiety and Depression Scale-Depression; PCS-4, Pain Catastrophising Scale-4; BL, baseline; FU, follow-up; ∆, follow-up score minus the initial score. :. : .