TABLE 3.

Hierarchical multiple regression of the relation between Beck Depression Inventory, Narcolepsy Severity Scale and creative abilities (fluency and originality) in the prediction of the Impact of Event Scale in patients with narcolepsy type 1 and in healthy controls

	IES
	Patients with NT1					Healthy controls
	Step 1	Step 2	Step 3	Step 4	Step 5	Step 1	Step 2	Step 3	Step 4	Step 5
A
BDI	0.36*	0.20	0.20	0.19	0.18	0.33*	0.30	0.29	0.32	0.38
NSS		0.32*	0.31	0.35	0.35		0.11	0.11	0.10	0.10
AUT fluency			0.11	0.02	0.04			−0.08	−0.07	−0.07
AUT fluency × BDI				−0.29*	−0.33				0.04	0.18
AUT fluency × NSS					0.11					−0.26
R2	0.11	0.17	0.16	0.22	0.21	0.09	0.08	0.07	0.04	0.08
ΔR2	0.13*	0.08*	0.01	0.07*	0.01	0.11*	0.01	0.01	0.00	0.05
F	6.55*	5.58*	3.90*	4.22*	3.42*	5.63*	3.04	2.09	1.55	1.83
ΔF	6.55*	4.14*	0.62	4.27*	0.46	5.63*	0.52	0.28	0.05	2.72
df	44	43	42	41	40	46	45	44	43	42
B
BDI	0.36*	0.20	0.19	0.19	0.26	0.33*	0.30	0.30	0.32	0.33
NSS		0.32*	0.30	0.30	0.25		0.11	0.11	0.09	0.09
AUT originality			0.08	0.07	0.16			0.01	0.06	0.08
AUT originality × BDI				−0.00	−0.27				0.09	0.09
AUT originality × NSS					0.41*					−0.04
R2	0.11	0.17	0.16	0.13	0.21	0.09	0.08	0.06	0.04	0.02
ΔR2	0.13*	0.08*	0.01	0.00	0.09*	0.11*	0.01	0.00	0.01	0.00
F	6.56*	5.58*	3.74*	2.74*	3.38*	5.63*	3.04	1.98	1.52	1.20
ΔF	6.56*	4.14*	0.25	0.00	4.90*	5.63*	0.52	0.00	0.25	0.02
df	44	43	42	41	40	46	45	44	43	42

AUT, Alternative Use Test; BDI, Beck Depression Inventory; IES, Impact of Event Scale; NSS, Narcolepsy Severity Scale total score; NT1, narcolepsy type 1.

A) Step 1: BDI; Step 2: NSS; Step 3: AUT fluency; Step 4: AUT fluency × BDI; Step 5: AUT fluency × NSS. B) Step 1: BDI; Step 2: NSS; Step 3: AUT originality; Step 4: AUT originality × BDI; Step 5: AUT originality × NSS. Numbers in the first four rows represent standardised regression coefficients; *p < 0.05.