SERPINC1 and Sepsis: In addition, the results of our study showed that the proportion of shock and the duration of vasopressor use in the high AT-III group (AT-III activity ≥ 59.7%) were lower than those in the low AT-III group (AT-III activity < 59.7%), suggesting that there is a close relationship between decreased AT-III activity and the occurrence of shock in sepsis patients.