Despite significantly shorter fasting times for clear fluids in group A compared with group B ( @/@ min ; P < @ ) , no significant difference was observed regarding gastric pH -LSB- @ ( @-@ @ ) / @ ( @-@ @ ) , P = @ -RSB- or residual volume -LSB- @ ( @-@ @ ) / @ ( @-@ @ ) ml kg ( -@ ) , P = @ -RSB- .