The median time to successful intubation was @ seconds ( IQR , @-@ seconds ) for the remifentanil group versus @ seconds ( IQR , @-@ seconds ) for the morphine-medazolam group ( P = @ ) at the first attempt and @ seconds ( IQR , @-@ seconds ) versus @ seconds ( IQR , @-@ seconds ) , respectively , for the second attempt ( P = @ ) .