Independent predictors of good outcome at hospital discharge. GOS 4-5, age <65 years, male, hypertension, coronary heart disease, diabetes, chronic pulmonary diseases, chronic renal disease, dyslipidemia, current smoking, alcohol intake, GCS 3-8, low UA level, low creatine level, and low urea level were defined as 1. The opposite of these factors was defined as 0. The risk factors of prognosis were analyzed by stepwise logistic regression. The reference interval of UA is 208-428 μmol/L for male and 155-357 μmol/L for female. The reference interval of creatine is 57-97 μmol/L for male and 41-81 μmol/L for female. The reference interval of urea is 3.1-8.0 mmol/L for male and 3.1-8.8 mmol/L for female.