TABLE 1

Demographics and Cognitive Test Data from Patients Included in Imaging Analysis, Group Mean ± SD

AD
VariableTotal11C-PIB–positive11C-PIB–negative
n30273
Age (y)67.0 ± 8.767.0 ± 8.567.0 ± 12.8
Sex
 Female13112
 Male17161
Mini-Mental Status Examination score (/30)*22.9 ± 3.3 (range, 11–27)23.0 ± 3.2 (range, 11–27)22.3 ± 4.5 (range, 18–27)
Verbal memory score (/10)†3.2 ± 1.93.3 ± 1.92.0 ± 1.7
Visuospatial memory score (/11)‡3.4 ± 1.93.6 ± 3.12.3 ± 1.5
Duration of symptoms (y)2.3 ± 1.12.2 ± 1.13.0 ± 1.4

  • ↵* Cognitive test data available from 26 of 30 patients.

  • ↵† Cognitive test data available from 24 of 30 patients.

  • ↵‡ Cognitive test data available from 25 of 30 patients.