Time to starting oral liquids , soft diet and regular diet were decreased ( 2.3 0.86 vs 3.45 1.19 ; P < 0.001 ; 3.3 0.73 vs 4.4 1.23 , P < 0.001 and 4.5 0.76 vs 5.6 1.42 , P = 0.002 ; respectively ) .