The baseline characteristics and comparison of demographic data of the study population.

Note:1. GOS = Glasgow Outcome Scale; GCS = Glasgow Coma Scale; IVH = intraventricular hemorrhage; SD = standard deviation.2. aFisher’s Exact Test was used; bPhi&Cramer’s V was used.3. Numerical variables were analyzed by Mann—Whitney U-test and categorical variables were analyzed by chi-squared test and Fisher’s exact test.***P≦0.001;**P≦0.01.The baseline characteristics and comparison of demographic data of the study population.