Characteristics | All participants (n=8472), n (%) | Current caregivers (n=290), n (%) | Long-term caregivers* (n=88), n (%) |
Outcome variable | |||
Mean years of follow-up | 5.91 | 4.05 | 6.25 |
Total person-years of follow-up | 50 138 | 1174 | 550 |
Incident events | 1669 | 63 | 32 |
Crude rate/1000 person-years | 33.3 | 53.7 | 58.2 |
Demographic variables | |||
Age, mean (SD), years | 63.9 (7.8) | 69.3 (8.9) | 68.4 (8.5) |
Women | 13 105 (52.28) | 162 (55.9) | 50 (56.8) |
Non-white race | 3099 (12.36) | 55 (18.9) | 18 (20.5) |
Hispanic ethnicity | 2073 (8.27) | 36 (12.4) | 8 (9.1) |
Socioeconomic variables | |||
Education, mean (SD), years | 12.6 (3.1) | 10.8 (3.8) | 10.8 (3.5) |
Maternal education ≥8 years | 15 895 (63.4) | 160 (55.2) | 46 (52.3) |
Height, mean (SD), m | 1.7 (0.1) | 1.7 (0.1) | 1.7 (0.1) |
Income, per capita, median (IQR), $ | 32 608.7 (37 193.8) | 15 273.5 (15 281.5) | 15 618.6 (15 929.9) |
Southern birthplace | 3395 (13.5) | 54 (18.6) | 23 (26.1) |
Health risk factors | |||
Vigorous activity | 13 112 (52.3) | 137 (47.2) | 41 (46.6) |
Current drinking | 8952 (35.7) | 59 (20.3) | 19 (21.5) |
Ever-smoker | 14 116 (56.3) | 158 (54.5) | 47 (53.4) |
Current smoker | 3268 (13.0) | 46 (15.9) | 11 (12.5) |
BMI, mean (SD), kg/m2 | 27.1 (4.7) | 26.9 (4.8) | 27.4 (5.1) |
Comorbid conditions | |||
Hypertension | 10 816 (43.1) | 117 (40.3) | 37 (42.1) |
Diabetes | 3016 (12.0) | 30 (10.3) | 10 (11.4) |
Elevated Depressive Symptoms | 3276 (13.1) | 70 (24.1) | 19 (21.6) |
Self-assessed health | |||
Fair/Poor Self-Rated Health | 4133 (16.5) | 99 (34.1) | 24 (27.33) |
ADL (≥1 limitation) | 1906 (7.6) | 35 (12.1) | 6 (6.8) |
IADL (≥1 limitation) | 474 (1.9) | 12 (4.1) | 1 (1.1) |
Recipient memory illness | |||
Impaired | 345 (1.4) | 46 (15.9) | 16 (18.2) |
↵* Since 2000 is the first full exposure year, long-term caregivers here refers to those who were high caregivers in both 2000 and 2002. Their baseline values (2000) are reported here.
ADL, activity of daily living; BMI, body mass index (kg/m2).CES-D, Centers for Epidemiologic Studies Depression scale; IADL, instrumental activity of daily living; IQR, indicates inter-quartile range.