Table 1.

Modeling Daily Average Pain Intensity

Level 1 Components:	Pain Intensity Intercept
	Person Mean Centered Sleep Quality from the previous night
	Level 1 Residual
Level 2 Components:	Patient Pain Intensity Intercept Deviation
	Demographic Covariates (Employment; Disability Compensation)
	Level 2 Residual

Note. Level 1 components refer to within person processes linking sleep quality to subsequent pain-related factors measured the next day. These were entered as fixed effects. Level 2 components refer to between subject processes. A random effect allowed average pain intensity to vary across participants. Demographic covariates including employment and disability compensation were entered as fixed effects.