A population based study of outcomes after evacuation of primary supratentorial intracerebral hemorrhage
BACKGROUND AND PURPOSE
The role of surgery after primary intracerebral hemorrhage (ICH) is controversial. To explore whether hematoma evacuation after ICH had improved short-term survival or functional outcome we conducted a retrospective observational population-based study.


METHODS
We identified all subjects with primary ICH between 1993 and 2008 among the population of Northern Ostrobothnia, Finland. Hematoma evacuation was carried out by using standard craniotomy or through a burr hole. We compared mortality rates and functional outcomes of patients with hematoma evacuation with those treated conservatively.


RESULTS
Of 982 patients with verified ICH during the study period, 127 (13%) underwent hematoma evacuation. Surgically treated patients were significantly younger (mean±SD, 63±11 vs. 70±12 years; p<0.001), had larger hematomas (66±36 vs. 28±40 ml; p<0.001), lower Glasgow Coma Scale scores (median, 11 vs. 14; p<0.001) and more frequently subcortical hematomas (68% vs. 24%; p<0.001) than those treated conservatively. In multivariable analysis, hematoma evacuation independently lowered 3-month mortality (adjusted hazard ratio [HR], 0.62; 95% confidence interval [CI], 0.43-0.88; p<0.03), particularly among patients aged≤70 years with ≥30 ml supratentorial hematomas (adjusted HR, 0.26; 95% CI, 0.14-0.49; p<0.001). However, poor outcome was not improved by surgery (adjusted odds ratio 0.71; 95% CI 0.29-1.70).


CONCLUSIONS
Improved 3-month survival was observed in patients who had undergone hematoma evacuation relative to patients not undergoing evacuation particularly in the subgroup of patients aged≤70 years with ≥30 ml supratentorial hematomas. Surgery might improve outcome if cases could be selected more precisely and if performed before deterioration.