Overall , the incidence of apnea ( @ to @ h ) was similar between arms ( @ % in RA and @ % in GA arms ; odds ratio -LSB- OR -RSB- , @ ; @ % CI , @ to @ , P = @ ) ; however , the incidence of early apnea ( @ to @ min ) was lower in the RA arm ( @ vs. @ % ; OR , @ ; @ % CI , @ to @ ; P = @ ) .