Table 3.

Results of t-tests pairwise comparison among four methods by which BL calculated

Items	Method 1	Method 2	Method 3
Method 2	−0.960	–	–
Method 3	−11.954*	−10.601*	–
Method 4	4.403*	5.053*	15.825*

*P<0.05. BL: Blood-loss. “–” represents not applicable.