Material and methods The study is part of a prospective
intervention among randomly selected DM2 patients
(n =186), Istanbul, Turkey. The data analyzed were Community
Periodontal Need Index (CPI) and HbA1c (glycated
hemoglobin percentage). Data was collected initially and at
the end of the intervention. The participants, both attending
oral examinations and filing out questionnaires (n =179), were
allocated to HC (n =77) and HE (n =102) groups by means of
a block table of random numbers.