Table 7. Determinants of the total cost. Regression analysis of total annual costs of care (GLM model with log link).

	Observed	Bootstrap			95% Conf. Interval
Depvar: Total Cost	Coef.	Std. Err.	Z	P>z	Lower	Upper
Patient's Age	-0.002	0.004	-0.34	0.731	-0.010	0.007
Patient Male = 1	0.110	0.095	1.16	0.247	-0.076	0.297
ZBIi	0.004	0.003	1.47	0.141	-0.001	0.010
NPI-Qii	0.033	0.015	2.18	0.029	0.003	0.062
ADLQiii	0.013	0.003	4.93	0.000	0.008	0.018
Paid caregiver iv	-0.132	0.114	-1.16	0.248	-0.356	0.092
SES1v	0.138	0.166	0.83	0.404	-0.187	0.464
SES2v	0.147	0.167	0.89	0.376	-0.179	0.474
SES3v	0.067	0.207	0.33	0.744	-0.338	0.473
Constant	11.816	0.377	31.36	0.000	11.078	12.555
N of Observations	306

Notes

ⁱ Zarit Burden Interview (ZBI).

ⁱⁱ Neuropsychiatric Inventory Questionnaire (NPI-Q).

ⁱⁱⁱActivities of Daily Life Questionnaire (ADLQ).

^iv Availability of a paid caregiver.

^v SESD 1–3 are indicator variables for SES levels 1,2 and 3, respectively. SESD 4 is omitted. Bootstrap standard errors with 1,000 replications.