Association between psychological distress and chronic periodontitis in Sri Lankan adults.

Objective: to determine the association between psychological distress and chronic periodontitis in 30-60 year olds residing in Colombo district, Sri Lanka.

Basic Research Design: an unmatched case control study which included 694 cases and 706 controls. An interviewer administered pre-tested questionnaire was used to obtain information on socio-demographic and behavioural factors while an oral examination was carried out to record periodontal parameters.