Table 3.

Correlations among clinical shoulder pain intensity, experimental pain measurement, and psychological factors at baseline and 6 months after surgery

	BPI	BPI	Cfiber50	Cfiber50	CPM	CPM	%change	%change	PCS	PCS	PHQ-9	PHQ-9	Threshold	Threshold	DASH	DASH
	B	6m	B	6m	B	6m	CPM B	CPM 6m	B	6m	B	6m	B	6m	B	6m
BPI B	1	.331	.234	.047	−.129	−.177	−.132	−.227	.248	.053	−.088	−.193	−.037	−.050	.628**	.127
BPI 6m		1	−.080	.009	−.137	.046	−.220	−.045	.151	.385**	.158	.177	.099	.068	.226	.559**
Cfiber50 B			1	.581**	.129	.274*	−.062	.042	.051	−.139	.176	−.147	−.465**	−.154	.217	−.043
Cfiber50 6m				1	−.025	.230	−.092	−.203	−.221	−.143	.092	−.072	−.330**	−.366**	.046	.129
CPM B					1	.146	.594**	.348**	.049	−.165	−.065	−.105	−.009	.079	−.078	−.211
CPM 6m						1	−.006	.680**	.086	.015	.300*	.084	−.065	.006	−.048	.150
%changeCPM B							1	.158	−.005	−.199	−.046	.000	.069	.167	−.067	−.249*
%changeCPM 6m								1	.179	−.013	.197	.046	.102	.253*	−.069	.042
PCS B									1	.334**	.385**	.236*	−.117	−.067	.349**	.225*
PCS 6m										1	.269*	.343**	−.006	−.026	.152	.230*
PHQ-9 B											1	.699**	−.186	.032	.338**	.245*
PHQ-9 6m												1	−.009	.004	.089	.287*
Threshold B													1	.549**	−.043	.047
DASH B														1	.062	−.037
DASH 6m															1	.203

B=Baseline; 6m=6 months after surgery

^**Correlation is significant at the 0.01 level.

^*Correlation is significant at the 0.05 level.

Abbreviation: BPI, Brief Pain Inventory; CPM, Conditioned Pain Modulation; PCS, Pain Catastrophizing Scale; PHQ-9, Patient Health Questionnaire DASH; Disability of the Arm, Shoulder, and Hand questionnaire.