The sensitivity , negative predictive value , and diagnostic accuracy of the endoscopic staging modalities , respectively , were EBUS , 72 % ( 95 % CI , 0.58-0 .83 ) , 88 % ( 0.81-0 .93 ) , and 91 % ( 0.85-0 .95 ) ; EUS , 62 % ( 0.48-0 .75 ) , 85 % ( 0.78-0 .91 ) , and 88 % ( 0.82-0 .92 ) ; and combined EBUS/EUS , 91 % ( 0.79-0 .97 ) , 96 % ( 0.90-0 .99 ) , and 97 % ( 0.93-0 .99 ) .