The diagnostic accuracy for the best cut-off point with the IRMS and the NDIRS was , respectively : sensitivity ( 90 and 100 % ) , specificity ( 96 and 89 % ) , positive predictive value ( 90 and 77 % ) , negative predictive value ( 96 and 100 % ) , + likelihaod ratio ( 25 and 9.3 ) and ( 0.1 and 0 ) .
