Table 2.

Final Multivariable Cox Proportional Hazards Model of Time to Caregiver Death

(Covariate adjusted)	HR	p Value	95% CI
Age (years)	1.06	<.0001	(1.05, 1.08)
Sex: male (1) vs. female (0)	2.40	<.0001	(1.79, 3.21)
African American (1) vs. Caucasian (0)	1.22	.17	(0.92, 1.62)
Education
Less than HS vs. College +	1.22	.36	(0.79, 1.89)
HS graduate vs. College +	0.97	.86	(0.65, 1.43)
Some college vs. College +	1.23	.26	(0.86, 1.76)
Income
Refused vs. $75,000 +	1.06	.86	(0.56, 2.00)
Less than $20,000 vs. $75,000 +	1.18	.59	(0.64, 2.17)
$20,000–$34,000 vs. $75,000 +	1.36	.27	(0.79, 2.35)
$35,000–$74,000 vs. $75,000 +	0.90	.69	(0.52, 1.54)
Hypertension (Y vs. N)	1.01	.97	(0.75, 1.36)
Cardiac disease (Y vs. N)	1.50	.01	(1.09, 2.07)
Diabetes (Y vs. N)	1.67	.0005	(1.26, 2.23)
Stroke (Y vs. N)	1.47	.07	(0.96, 2.24)
Self-rated health	1.28	.0006	(1.11, 1.48)
CR/CG relationship
Parent vs. spouse	0.80	.32	(0.51, 1.25)
Child vs. spouse	1.65	.01	(1.13, 2.42)
Sibling vs. spouse	1.33	.24	(0.83, 2.15)
Other vs. spouse	1.14	.50	(0.78, 1.68)
Caregiving hours
Missing vs. >30	1.37	.14	(0.91, 2.07)
<10 vs. >30	1.04	.83	(0.71, 1.52)
10–19 vs. >30	1.03	.90	(0.66, 1.61)
20–29 vs. >30	1.20	.45	(0.75, 1.90)
Caregiving strain
A lot of strain vs. No strain	1.55	.02	(1.06, 2.26)
A lot of strain vs. Some strain	1.83	.001	(1.27, 2.63)

Note. CI = confidence interval; HR = hazard ratio.