Variables | Incident dementia | No incident dementia | P value |
---|---|---|---|
(N=4149) | (N=357945) | ||
Age at baseline, years, mean (SD) | 64.49(4.53) | 56.87(8.00) | <0.001 |
Sex, N (%) | <0.001 | ||
Male | 2211(53.3%) | 159183(44.5%) | |
Female | 1938(46.7%) | 198762(55.5%) | |
Education, N (%) | <0.001 | ||
≥College or University degree | 903(21.8%) | 120477(33.7%) | |
<College or University degree | 1831(44.1%) | 178522(49.9%) | |
Skin color, N (%) | <0.001 | ||
White | 3302(79.6%) | 273585(76.4%) | |
Colored | 847(20.4%) | 84352(23.6%) | |
Use of sun/UV protection, N (%) | <0.001 | ||
No | 625(15.1%) | 33268(9.3%) | |
Yes | 3477(83.8%) | 322624(90.1%) | |
Do not go out in sunshine 3 | 45(1.1%) | 2038(5.7%) | |
Employment status, N (%) | <0.001 | ||
Yes | 753(18.1%) | 203004(56.7%) | |
No | 3396(81.9%) | 154941(43.3%) | |
Sleep duration, hours, N (%) | <0.001 | ||
<7 | 1070(25.8%) | 87199(24.4%) | |
7 | 1246(30.0%) | 138878(38.8%) | |
>7 | 1833(44.2%) | 131868(36.8%) | |
PM2.5, ug/m3, mean (SD) | 10.04(1.05) | 9.97(1.05) | <0.001 |
Fracture history, N (%) | 0.348 | ||
Yes | 414(10.0%) | 34184(9.6%) | |
No | 3711(90.0%) | 322213(90.4%) | |
Vitamin D supplement, N (%) | 0.092 | ||
Yes | 177(4.3%) | 13490(3.8%) | |
No | 3944(95.7%) | 343441(96.2%) | |
Hearing loss, N (%) | <0.001 | ||
Yes | 1440(36.1%) | 90025(26.1%) | |
No | 2548(63.9%) | 254597(73.9%) | |
Smoking status, N (%) | <0.001 | ||
Never | 1901 (46.1%) | 194259 (54.4%) | |
Previous | 1805 (43.7%) | 126431 (35.4%) | |
Current | 420 (10.2%) | 36256 (10.2%) | |
Alcohol drinker status, N (%) | <0.001 | ||
Never | 280 (6.8%) | 14058 (3.9) | |
Previous | 295 (7.1%) | 12469 (3.5) | |
Current | 3566 (86.1%) | 331202 (92.6) | |
CVD diagnosed by doctor, N (%) | <0.001 | ||
Heart disease a | 582(14.1%) | 16708(4.7%) | |
Stroke | 243(5.9%) | 5503(1.5%) | |
Hypertension | 1744(42.1%) | 98880(27.7%) | |
TPA, MET-mins/week, mean (SD) | 2423.34 (2875.69) | 2449.20 (2746.68) | 0.555 |
BMI, kg/m2, mean (SD) | 27.72(4.95) | 27.44(4.80) | <0.001 |
Time spent in outdoor light, hours/day, mean (SD) | |||
Average | 2.98(1.51) | 2.51(1.45) | <0.001 |
Summer | 3.99(2.05) | 3.46(1.97) | <0.001 |
Winter | 1.97(1.46) | 1.57(1.31) | <0.001 |