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Demographic and clinical characteristics of participants.
| N | M/F | Age (yrs) | MMSE | CDR | ||||
|---|---|---|---|---|---|---|---|---|
| Group | Mean | S.D. | Mean | S.D. | Mean | S.D. | ||
| YC | 142 | 63/79 | 22.44 | 3 | – | – | – | – |
| OC | 87 | 23/64 | 77.68 | 7.9 | 28.91 | 1.2 | 0 | 0 |
| AD | 28 | 6/22 | 77.46 | 6.6 | 22.07 | 3.5 | 1 | 0 |
| OCPibneg | 35 | 7/28 | 73.69 | 7.5 | 29.7 | 0.3 | 0 | 0 |
Values represent mean ± standard deviation.
CDR = Clinical Dementia Rating; MMSE = Mini Mental State Examination; YC = young controls; OC = older controls; OCPibneg = PiB-negative older controls; AD = Alzheimer's disease.
