Distribution of aCEI and aTEI among the 21 hospitals (2007 Q3–Q4). This figure is divided into 4 quadrants by two lines (aCEI = 1 and aTEI = 1). The performance of the hospitals in the first quadrant was worse than the other hospitals due to their higher charge and longer LOS. The hospitals in the second quadrant had a longer LOS despite a lower charge compared with the others. The performance of the hospitals in the third quadrant was better than the other hospitals because of their shorter LOS and lower charge. The hospitals in the forth quadrant had a higher charge in spite of a shorter LOS.