TABLE 1.
Descriptive statistics of OASIS‐3 (internal validation set, n = 644) and KSHAP (external validation set, n = 151)
| OASIS‐3 internal validation dataset (n = 644) | KSHAP external validation dataset (n = 151) | |||
|---|---|---|---|---|
| Not impaired (n = 436) | Very mild impairment (n = 169) | Mild–moderate impairment (n = 39) | ||
| Mean ± SD (range) | ||||
| Age | 70.9 ± 6.52 (46–92) | 72.2 ± 6.87 (50–88) | 76.1 ± 8.79 (60–96) | 71.7 ± 6.56 (59–93) |
| Sex (female: Male) | 239:197 | 72:97 | 16:23 | 96:55 |
| Years of education | 15.8 ± 2.67 (8–29) | 15.2 ± 2.85 (7–23) | 14.8 ± 3.34 (8–20) | 7.2 ± 4.12 (0–23) |
| MMSE a /MMSE‐DS | 28.9 ± 1.29 (21–30) | 27.0 ± 2.72 (18–30) | 24.0 ± 3.29 (18–30) | 27.0 ± 2.14 (21–30) |
| CDR | 0 | 0.5 | 1.04 ± 0.21 | 0.02 ± 0.11 |
| CDR‐SOB b | 0.02 ± 0.12 | 1.73 ± 1.02 | 5.35 ± 1.54 | |
Note: Descriptive statistics of OASIS‐3 dataset were presented based on CDR global score (0 = no impairment, 0.5 = questionable impairment, 1 = mild impairment, 2 = moderate impairment) which provide summarized estimate of dementia severity.
Abbreviations: CDR, Clinical Dementia Rating global score; CDR‐SOB, Clinical Dementia Rating Sum of Boxes; MMSE, Mini‐Mental Status Examination; MMSE‐DS, Mini‐Mental Status Examination Dementia Screen.
a
Missing value omitted (Not impaired: 1).
b
Missing value omitted (Not impaired: 11, Very Mild Dementia: 7). MMSE‐ DS for external validation dataset.