Respond to the letter on 'Interobserver reliability of the ankle brachial index, toe-brachial index and distal pulse palpation in patients with diabetes: a methodological issue'.

We respond to the letter of Nadery and Shahsavari regarding our paper entitled 'Interobserver reliability of the ankle brachial index, toe -brachial index and distal pulse palpation in patients with diabetes. In this letter, we concluded that despite some limitations, the kappa coefficient is an informative measure of agreement in most circumstances that we can use in this type of clinical research.