Fewer patients had interface displacements ( 32 % vs. 56 % ; P = 0.01 ) , oxygen desaturations ( 40 % vs. 75 % ; P < 0.001 ) , required reintubation ( 4 % vs. 21 % ; P = 0.01 ) , or any form of ventilator support ( 7 % vs. 35 % ; P < 0.001 ) in the NHF group .