During the first 12 h of infusion , the mean ( + / - SE ) percentage time spent above pH 4.0 and 5.4 was higher with SST versus PAN ( 84.4 % + / -4.8 versus 55.1 % + / -8.3 , p = 0.0049 and 74.2 % + / -6.5 versus 47.1 % + / -8.3 , p = 0.0163 , respectively ) and there was a trend favouring the SST group regarding the time spent above pH 6.0 and 6.8 ( 65.7 % + / -6.4 versus 43.3 % + / -8.2 , p = 0.0669 and 49.2 % + / -7.7 versus 28.4 + / -6.6 , p = 0.0738 , respectively ) .
