Mortality of spontaneous intracerebral haemorrhage patients and high serum caspase-8 concentrations.

Objective: Apoptotic changes in brain samples have been found in haematoma areas of patients with spontaneous intracerebral haemorrhage (SIH) undergoing surgical haematoma evacuation. However, circulating caspase-8 concentrations in SIH patients have not been described. Thus, we carried out this study with the aim to explore whether there is an association of circulating caspase-8 concentrations and mortality in patients with SIH.

Methods: We included patients with severe and supratentorial SIH. We established that the SIH was severe if Glasgow Coma Scale (GCS) was lower than 9. Intensive Care Units from 5 Spanish hospitals carried out the recruitment of patients of this observational and prospective study. We registered serum caspase-8 levels at moment of severe SIH diagnosis and 30-day mortality.

Results: Surviving (n = 41) in respect to non-surviving SIH patients (n = 38) showed lower serum caspase-8 levels (p < 0.001). The area under the curve to estimate 30-day mortality ability by serum caspase-8 levels was 0.75 (95% CI = 0.64-86; p < 0.001). Kaplan-Meier analysis found that patients with serum caspase-8 levels > 17.8 ng/mL showed higher death risk (Hazard ratio = 3.9; 95% CI = 1.99-7.63; p < 0.001). Multiple logistic regression analysis revealed the association of serum caspase-8 concentrations (controlling for intracerebral haemorrhage score, midline shift and early haematoma evacuation) with mortality at 30 days (Odds Ratio = 1.048; 95% CI = 1.018-1.079; p = 0.002).

Conclusions: The association of serum caspase-8 concentrations with mortality of SIH patient mortality is the main of novel findings that have been revealed in our study.