The relationship between rebleeding after spontaneous SAH and APOE polymorphisms in a Chinese population.

Rebleeding leads to lots of patients' disability and mortality after spontaneous subarachnoid hemorrhage (SAH), but the risk factors of rebleeding have not been fully understood. More evidence showed apolipoprotein E (apoE protein, APOE gene) influenced the outcome of spontaneous SAH. In this study, we aimed to investigate the relationship of APOE polymorphisms with rebleeding after spontaneous SAH. A total of 185 patients with spontaneous SAH were involved in the current study. Genomic DNA was extracted from venous blood samples to identify the APOE genotype by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Rebleeding was defined as acute clinical deterioration that was accompanied by computed tomography (CT) evidence of rebleeding in the subarachnoid space. A total of 21 patients occurred rebleeding in 185 patients with spontaneous SAH in the hospital. Data were analyzed by χ(2)-test and logistic regression analyses. The statistical analysis indicated no significant association between APOE genotype and rebleeding in a Chinese population.