Crs were negatively correlated with oxygenated index(OI)(r=-0 948)and a linear regressive relation was found(OI=64 73-82 70Crs).

• Crs与氧合指数(OI)呈负相关关系 (r =- 0 948) ,有直线回归关系 :OI=6 4 73- 82 70Crs。