Table 2.
Characteristics of the validation datasets from the National Health Insurance Service-Health Screening Cohort (40-79 years of age).
| Variable | All-cause dementia (n=95,969) | Alzheimer dementia (n=93,009) | ||
| Baseline | Repeated measurement | Baseline | Repeated measurement | |
| Duration of follow-up (years), mean (SD) | 10.39 (1.44) | —a | 10.48 (1.31) | — |
| Number of periodic health examinations, mean (SD) | 5.66 (2.56) | — | 5.71 (2.56) | — |
| Age (years), mean (SD) | 52.53 (9.35) | — | 52.22 (9.17) | — |
| Sex (female), n (%) | 43,786 (45.63) | — | 42,178 (45.35) | — |
| Body mass index (kg/m2), mean (SD) | 24.04 (2.96) | 24.02 (2.80) | 24.04 (2.96) | 24.02 (2.80) |
| Systolic blood pressure (mm Hg), mean (SD) | 126.80 (18.06) | 126.34 (12.45) | 126.68 (18.00) | 126.19 (12.38) |
| Diastolic blood pressure (mm Hg), mean (SD) | 79.51 (11.67) | 78.49 (7.60) | 79.50 (11.66) | 78.44 (7.58) |
| Fasting plasma glucose (mg/dL), mean (SD) | 97.76 (33.23) | 100.02 (22.11) | 97.65 (33.06) | 99.96 (22.07) |
| Total cholesterol (mg/dL), mean (SD) | 200.43 (38.45) | 199.26 (29.48) | 200.35 (38.34) | 199.25 (29.32) |
| Smoking, n (%) | 23,104 (24.07) | 20,438 (21.30) | 22,593 (24.29) | 19,966 (21.47) |
| No exercise, n (%) | 41,179 (42.91) | 62,805 (65.44) | 40,125 (43.14) | 61,415 (66.03) |
| Cardiovascular disease, n (%) | 6,629 (6.91) | 39,848 (41.52) | 6,188 (6.65) | 38,004 (40.86) |
| Diabetes, n (%) | 3744 (3.90) | 13,116 (13.67) | 3472 (3.73) | 12,537 (13.48) |
| Hypertension, n (%) | 7609 (7.93) | 34,033 (35.46) | 7120 (7.66) | 32,720 (35.18) |
| Psychiatric disorder, n (%) | 3209 (3.34) | 28,723 (29.93) | 2992 (3.22) | 27,321 (29.37) |
| Neurological disorder, n (%) | 8755 (9.12) | 52,773 (54.99) | 8283 (8.91) | 50,572 (54.37) |
| Event rate, n (%) | 5456 (5.69) | 5456 (5.69) | 2503 (2.69) | 2503 (2.69) |
aNot applicable.