Table 5: Interobserver agreement (Kappa value)*.

Inter-observer agreementNugent’s methodBV by Hay’s
BVNormalGrade IGrade III

Between PB and RC0.820.750.910.88
Between PB and SG0.670.630.720.76

Intermediate scores in Nugent’s and grade II in Hay’s and Ison’s classification have been excluded for calculating interobserver agreement.