Table 5.

Univariate regression analysis and correlation coefficients for Zarit Burden Interview for caregivers and measured variables.

Variables	Regression coefficient	95% CI		P value
		Lower	Upper
NRS	1.271	0.044	2.498	.042*
PCS	0.312	0.032	0.592	.029*
HADS anxiety	0.633	0.039	1.228	.037*
HADS depression	0.829	0.284	1.373	.003**
AIS	0.409	-0.081	0.899	.101
PDAS	0.264	0.077	0.450	.006**
PSEQ	-0.359	-0.538	-0.181	.000**

AIS = Athens insomnia scale, CI = confidence interval, HADS = hospital anxiety and depression scale, NRS = numeric rating scale, PCS = pain catastrophizing scale, PDAS = pain disability assessment scale, PSEQ = pain self-efficacy questionnaire.

Asterisks indicate statistical significance:

^*P < .05,

^**P < .01.