Table 4.

Analysis 2 Regression Coefficient Explanations and Result Summary

Parameter
Level One	Level Two	Hypothesis	Explanation	Electrode	Result
Intercept b0i	Intercept γ00		Grand average unpleasantness ratings	All	M = 8, p<.001
	Menstrual Pain γ01		Association between unpleasantness and menstrual pain	All	ns
	Somatic Symptoms γ02		Association between unpleasantness and somatic symptoms	All	ns
	Provoked Bladder Pain γ03	2	Association between unpleasantness and provoked bladder pain	All	ηp2=.06, p=.003
Brightness Slope b1i	Intercept γ10		Association between unpleasantness and brightness intensity	Oz	ηp2=.17, p<.001
	Menstrual Pain γ11		How menstrual pain affects the association between unpleasantness and brightness intensity	Oz	ηp2=.03, p=.03
	Somatic Symptoms γ12		How somatic symptoms affect the association between unpleasantness and brightness intensity	Oz	ns
				CP6	ηp2=.09, pfdr=.01
	Provoked Bladder Pain γ13		How provoked bladder pain affects the association between unpleasantness and brightness intensity	Oz	ns
PSD Slope b2i	Intercept γ20	3a	Association between unpleasantness and cortical activity	Oz	ηp2=.07, p=.002
	Menstrual Pain γ21		How menstrual pain affects the association between unpleasantness and cortical activity	Oz	ns
	Somatic Symptoms γ22		How somatic symptoms affect the association between unpleasantness and cortical activity	Oz	ns
				CP1	ηp2=.06, pfdr=.04
				CP6	ηp2=.08, pfdr=.02
	Provoked Bladder Pain γ23	3b	How provoked bladder pain affects the association between unpleasantness and cortical activity	Oz	ηp2=.03, p=.03

Note. Unpleasantness refers to ratings of visual unpleasantness during the visual task. ns = not significant; fdr = false discovery rate.