Table 3. Hierarchical Regression Models Predicting 48-hour Shoulder Pain at Rest, with Motion, and with Isometric Action Using Baseline, Pre-injury Predictors.

					Activity-Related Pain
	Rest-Related Pain				Motion Pain				Isometric Pain
	Beta	P	Δ R2	P	Beta	P	Δ R2	P	Beta	P	Δ R2	P
1			0.027	0.281			0.006	0.850			0.005	0.889
Age	0.025	0.785			<0.001	0.996			−0.027	0.771
Sex	−0.163	0.065			0.071	0.423			−0.011	0.902
BMI	−0.016	0.867			0.013	0.890			−0.049	0.605
2			0.020	0.249			0.043	0.232			0.029	0.461
Age	0.061	0.512			0.054	0.564			0.013	0.893
Sex	−0.157	0.076			0.079	0.367			−0.005	0.955
BMI	−0.021	0.819			0.004	0.968			−0.053	0.577
PCS	0.170	0.095			0.247	0.015			0.202	0.048
TSK-11	−0.099	0.323			−0.149	0.135			−0.088	0.382
3			0.017	0.338			0.076	0.021			0.207	<0.001
Age	0.071	0.449			0.054	0.552			0.011	0.899
Sex	−0.137	0.140			0.107	0.232			0.040	0.632
BMI	0.017	0.855			0.051	0.579			0.023	0.789
PCS	0.170	0.100			0.209	0.036			0.133	0.149
TSK-11	−0.074	0.466			−0.144	0.142			−0.080	0.378
PPT	−0.057	0.533			−0.061	0.494			−0.084	0.311
SHPR	0.083	0.384			0.285	0.002			0.472	<0.001
CPM	0.128	0.186			0.041	0.665			0.056	0.527

All predictor variables measured at baseline (pre-injury).

Abbreviations: BMI = body mass index, CPM = conditioned pain modulation, PCS = Pain Catastrophizing Scale, P = p-value, PPT = pressure pain threshold, SHPR = suprathreshold heat pain response, TSK = Tampa Scale of Kinesiophobia.