TABLE 2.

Determinants of dimensional apathy scale (DAS) scores in amyotrophic lateral sclerosis (ALS), Parkinson’s disease (PD), and Huntington’s disease (HD) patients.

Group	Predictors	DAS-total		DAS-initiation		DAS-executive		DAS-emotional
		β	P	β	P	β	P	β	P
ALS	Education	-0.48	0.006b	-0.53	<0.001d	n.e.	–	n.e.	–
	ECAS	n.e.	–	0.25	0.009	-0.37	<0.001c	n.e.	–
	STAI-Y1	n.e.	–	n.e.	–	n.e.	–	-0.3	0.006a
	STAI-Y2	0.36	<0.001b	0.35	<0.001d	0.39	<0.001c	n.e.	–
	BDI	n.e.	–	n.e.	–	0.24	0.013	n.e.	–
	ALSFRS-R	n.e.	–	–0.25	0.009	n.e.	–	n.e.	–
PD	Education	n.e.	–	n.e.	–	n.e.	–	n.e.	–
	ECAS	-0.4	<0.001b	n.e.	–	–0.27	0.010	-0.31	0.005b
	STAI-Y1	n.e.	–	0.28	0.016a	n.e.	–	n.e.	–
	STAI-Y2	n.e.	–	n.e.	–	n.e.	–	-0.33	0.004b
	BDI	0.24	0.023	n.e.	–	0.42	<0.001b	n.e.	–
HD	Education	n.e.	–	n.e.	–	n.e.	–	n.e.	–
	ECAS	n.e.	–	n.e.	–	n.e.	–	n.e.	–
	STAI-Y1	n.e.	–	n.e.	–	n.e.	–	n.e.	–
	STAI-Y2	0.56	0.005a	0.65	0.001a	n.e.	–	n.e.	–
	BDI	n.e.	–	n.e.	–	n.e.	–	n.e.	–
	UHDRS-VI	n.e.	–	n.e.	–	–0.48	0.017	n.e.	–

ALS, amyotrophic laterals sclerosis; BDI, Beck depression inventory; DAS, dimensional apathy scale; ECAS, Edinburgh cognitive and behavioral ALS screen; HD, Huntington’s disease; n.e., predictor not entered into the final step of the stepwise regression procedure; PD, Parkinson’s disease; STAI-Y1, state and trait anxiety inventory–form Y–state anxiety; STAI-Y2, state and trait anxiety inventory–form Y–trait anxiety. Significant regression coefficients at respective, adjusted α thresholds are in bold. ^aSignificant at α_adjusted = 0.017. ^bSignificant at α_adjusted = 0.008. ^cSignificant at α_adjusted = 0.006. ^dSignificant at α_adjusted = 0.004. For each group, only those predictors entered into the final step of at least one of the model are shown.