Table 4.

Multilevel model examining the potential moderators of the association between perceived medication side effects and pain-related activity interference

Fixed effects	β	SE	df	t	p
Model 4a
MSE-I x gender	.001	.020	523	.05	ns
Model 4b
MSE-I x pain intensity	.000	.001	551	.38	ns
Model 4c
MSE-I x negative affect	.001	.001	562	1.91	ns

Note. Values are from the final multilevel model. Level 1 independent variables are within-person centered. In all these models, appropriate main effects preceded the modeling of each interaction effect. MSE-I = Medication side effect index;

β = unstandardized regression coefficient; SE = Standard error; ns = nonsignificant.