Table 1.
Baseline characteristics of study participants
| No incident dementia (n = 143,144) | Incident dementia (n = 3,507) | |
|---|---|---|
| Variables | Mean (SD) or n (%) | Mean (SD) or n (%) |
| Age (y) | 64.55 (2.84) | 66.17 (2.7) |
| Sex (female) | 71,147 (49.7) | 1,511 (43.09) |
| Education (college or higher) | 42,227 (29.5) | 805 (22.95) |
| Townsend deprivation index | −1.71 (2.87) | −1.21 (3.13) |
| Ethnicity (white) | 139,889 (97.73) | 3,411 (97.26) |
| Apoe status | ||
| 1 ε4 allele | 33,628 (23.49) | 1,443 (41.15) |
| 2 ε4 alleles | 3,058 (2.14) | 415 (11.83) |
| BMI (kg/m2) | 27.42 (4.4) | 27.51 (4.7) |
| Smoking status | ||
| Never | 71,406 (49.88) | 1,553 (44.28) |
| Former | 60,661 (42.38) | 1,627 (46.39) |
| Current | 11,077 (7.74) | 327 (9.32) |
| Alcohol | ||
| Never | 19,296 (15.46) | 602 (20.38) |
| Moderate | 64,134 (51.37) | 1,447 (48.98) |
| Excessive | 41,415 (33.17) | 905 (30.64) |
| Any chronic condition (present) | 67,952 (47.47) | 2,056 (58.63) |
| Depression (yes) | 51,000 (35.63) | 1,403 (40.01) |
| Healthy diet score (yes) | 77,272 (53.98) | 1,804 (51.44) |
| Social contact (yes) | 139,765 (97.64) | 3,383 (96.46) |
| TV watching time (h/day) | 3.01 (1.64) | 3.39 (1.86) |
| Computer time (h/day) | 1.03 (1.24) | 0.93 (1.31) |
| PA (MET h/day) | 0.94 (0.91) | 0.95 (0.98) |