Table 4 Comparison of mortality differences according to antithrombin (AT) activity

AT activity <40 %

45.5 % (85/187)

<0.0001

AT activity ≧40 %

29.8 % (188/632)

AT activity <50 %

39.3 % (133/339)

0.0026

AT activity ≧50 %

29.2 % (140/480)

AT activity <60 %

36.6 % (180/492)

0.0155

AT activity ≧60 %

28.4 % (93/327)

AT activity <70 %

35.5 % (221/623)

0.0205

AT activity ≧70 %

26.5 % (52/196)