Table 5.

Hierarchical regression predicting the magnitude of endogenous pain inhibition (CPM) with ethnicity as an effect moderator.

	B	SEB	β	R2	ΔR2	ΔF
Step 1				0.04	---	2.01
Sex	30.79	14.61	0.17*
PCS	−0.87	0.80	−0.09
BDI	0.85	1.55	0.05
Step 2				0.076	0.036	1.81
LOT-R	3.38	1.70	0.19*
Ethnicity A/PIa	8.24	18.39	0.04
Ethnicity AAb	17.64	19.86	0.08
Step 3				0.082	0.006	0.45
LOT-R X Dummy 1 A/PIa	−1.07	4.02	−0.03
LOT-R X Dummy 2 AAb	3.15	3.86	0.08

^a= First dummy-coded ethnicity variable (0 = Caucasian Americans, 1 = Asian/Pacific Islander)

^b= Second dummy-coded ethnicity variable (0 = Caucasian Americans, 1 = African Americans)

^*= p < 0.05,

^**= p < 0.01