BZR index values for hemispheres ipsilateral or contralateral to arterial disease
| Decreased CBF at baseline (n=39) | Normal CBF at baseline (n=37) | |||
| Side | Ipsilateral | Contralateral | Ipsilateral | Contralateral |
| BZR index at baseline | 40.6±39.2 | 19.9±21.2 | 13.2±12.6 | 8.7±8.7 |
| BZR index at follow-up | 64.9±65.1* | 30.7±28.4 | 16.7±15.1 | 12.4±9.1 |
| BZR index change | 24.2±44.3† | 10.7±29.1 | 3.4±9.8 | 3.6±9.1 |
The mean comparative values for BZR index across 10 control subjects or changes of BZR index across seven control subjects were 1.78±1.79 or 0.94±1.38.
*P<0.05/4 (using Bonferroni correction) versus baseline value (paired t-test).
†P<0.05/2 (using Bonferroni correction) versus corresponding value in the ‘Normal CBF’ group (Student’s t-test).
BZR, benzodiazepine receptor; CBF, cerebral blood flow.