Aim: To identify risk indicators associated with tooth loss and periodontitis in treated patients responsible for arranging supportive periodontal care. Materials and Methods: Ninety seven Chinese subjects (34-77 years) who showed favourable responses to periodontal therapy provided in a teaching hospital 5-12 years previously were recalled. They were advised to seek regular supportive periodontal care on discharge. Background information, general health status, smoking, oral hygiene habits, follow-up dental care, tooth loss, and periodontal parameters were investigated. Multiple regression analysis was performed. Results: Two hundred fifty six teeth had been lost; 195 due to self-reported periodontal reasons. Up to 26.8% sites were with pockets 6mm. Positive correlations were found between total/periodontal tooth loss and i) smoking-packyears, ii) time spent on oral hygiene, iii) years since therapy's conclusion, iv) age; and negative correlations with v) interdental brush use, and vi) education levels. Tooth loss by arch was correlated with removable partial denture wearing in that arch. Percentage sites with pockets 6mm was significantly negatively correlated with percentage sites without bleeding on probing. Conclusions: Smokers, more elderly patients, removable partial denture wearers, patients with lower education levels or not using interdental brushes ought to be targeted for clinic-based supportive periodontal care.