Table 1.
Characteristics of the enrolled subjects
| Variables | Number |
|---|---|
| Number | 137 |
| Sex | |
| Male: female | 28:109 |
| Age (years) | |
| Mean ± SD | 71.60 ± 7.56 |
| Range | 58–92 |
| Smoking | |
| Non-smoker, n (%) | 134 (98.5%) |
| Smoker, n (%) | 3 (1.5%) |
| Number of subjects with AD (%) | 38 (28.1%) |
| Number of subjects with VD (%) | 7 (5.2%) |
| MMSE-K | 22.08 ± 6.56 |
| CERAD-K | 60.05 ± 22.72 |
| YSK_threshold | 2.41 ± 1.79 |
| YSK_discrimination | 6.11 ± 2.07 |
| YSK_identification | 8.93 ± 3.25 |
| YSK_TDI | 17.46 ± 5.49 |
| Mean score of PEA sniffing bead system | 2.58 ± 1.52 |
| Mean score of n-butanol sniffing bead system | 3.07 ± 1.50 |
AD Alzheimer’s disease, CERAD-K Consortium to Establish a Registry for Alzheimer’s Disease-Korean version, MMSE-K Mini-Mental State Examination-Korean version, PEA 2-phenylethyl alcohol, SD Standard deviation, VD Vascular dementia, YSK_TDI YSK_threshold-discrimination-identification