Table 3.

Combination of caregiver status and stress level on 8-year mortality rate among 1069 Caregiver-SOF respondents

Variables	% Died	Mortality rate per 1000 person-years	Unadjusted HR (95% CI)	Adjusted HR* (95% CI)
A. General perceived stress
Non-caregiver: low stress (n=502)	26.9	44.9	1.00	1.00
Non-caregiver: high stress (n=192)	28.7	50.5	1.13 (0.83–1.55)
Early effect (years 1–3)				1.69 (1.01 2.81)
Late effect (> 3 years)				0.87 (0.57 1.32)
Caregiver: low stress (n=226)	16.8	25.2	0.54 (0.38–0.77)	0.67 (0.46 0.94)
Caregiver: high stress (n=149)	24.2	36.7	0.79 (0.54–1.14)
Early effect (years 1–3)				1.44 (0.77 2.69)
Late effect (> 3 years)				0.76 (0.48 1.21)
B. Caregiving-related stress
Non-caregiver (n=694)	27.4	46.4	1.00	1.00
Caregiver: caregiving tasks not stressful (n=219)	14.6	21.3	0.44(0.30–0.64)	0.57 (0.38–0.84)
Caregiver: caregiving tasks physically and/or emotionally stressful (n=156)	26.9	42.6	0.89(0.64–1.25)	1.00 (0.71–1.41)

^*Adjusted for age, race, BMI, # IADL limitations and presence of medical conditions.

HR= Hazards ratio

CI = Confidence Interval