. 2020 Apr 2;15(4):e0230933. doi: 10.1371/journal.pone.0230933

Table 3. Multiple regression analysis examining predictors of Zarit Burden Interview score.

(n = 60).

	β (95% CI)	R²_change	F_change (df)	p value
Dependent = ZBI		0.28	5.4 (4, 5)	0.001
Age, year	0.19 (-0.06–0.44)
Insomnia^a	0.26^* (0.01–0.52)
PDAS	0.13 (-0.14–0.40)
HADS depression	0.18 (-0.07–0.43)

Abbreviation: ZBI: Zarit Burden Interview; AIS: Athens Insomnia Scale; PDAS: Pain Disability Assessment Scale; HADS: Hospital Anxiety and Depression Scale; β: standardized regression coefficient; CI: confidence interval.

^aInsomnia was defined by Athens Insomnia Scale ≥ 8.

*p <0.05