The overall median ( interquartile range ) number of antibiotic treatment days were 9 ( 6-21 ) versus 11 ( 6-22 ) , P = 0.58 ; in patients with positive pulmonary culture , 11 ( 7-27 ) versus 15 ( 8-27 ) , P = 0.33 ; and in patients with septic shock , 9 ( 6-22 ) versus 11 ( 6-24 ) , P = 0.64 ; with an overall 90-day all-cause mortality of 35 ( 18 % ) versus 31 ( 16 % ) , P = 0.54 in the PCT versus standard care , respectively .