Table 5.

Unadjusted & adjusted analyses of participant-specific slope estimates

Participants	Effect	Change/wk	Change/34 wks	p-value	Sig
Unadjusted
All participants	Control	−0.0032	−0.11	0.3933
	Intervention	−0.0082	−0.28	0.0272	*
	Diff (Cont - Int)	0.0050	0.17	0.3450
≥ 4 sessions	Control	−0.0066	−0.22	0.1436
	Intervention	−0.0120	−0.41	0.0073	*
	Diff (Cont - Int)	0.0054	0.18	0.3889
Adjusted
All participants	Control	−0.0055	−0.19	0.1649
	Intervention	−0.0093	−0.32	0.0144	*
	Diff (Cont - Int)	0.0038	0.13	0.4836
≥4 sessions	Control	−0.0091	−0.31	0.0813
	Intervention	−0.0124	−0.42	0.0065	*
	Diff (Cont - Int)	0.0033	0.11	0.6279

Note. For the unadjusted panel (top), change/wk is the estimate of the mean slope computed from a mixed two-factor (group × shift) ANOVA model where the outcome is the participant-specific slope (from regressing interdialytic weight gain on time in weeks) and shift is a random factor. For the adjusted panel (bottom), change/wk is the estimate of the mean slope computed from a mixed three-factor (group × education × shift) ANOVA model where the outcome is the participant-specific slope (from regressing interdialytic weight gain on time in weeks) and shift is a random factor. Change/34 weeks = 34(change/wk) and represents the estimated change from 1 week pre-intervention to 33 weeks after beginning the intervention. Education is categorized as < high school, high school, and > high school. All results account for within-shift correlation. Sig = “*” if p-value < .05. Diff = control-minus-intervention difference in change estimates.