Of the @,@ children undergoing screening polysomnography , @ ( @ % ) were eligible ( @ AHI < @ or @ obstructive apnea index -LSB- OAI -RSB- < @ and without severe oxygen desaturation ) and randomized ; @ ( @ % ) were eligible but were not randomized ; @ ( @ % ) had AHI/OAI levels below entry criteria ; and @ ( @ % ) had levels of OSAS that exceeded entry criteria .