关键词: 慢性牙周炎, 治疗, 失访, 影响因素分析

Abstract: Objective　To investigate and analyze the current status and influencing factors of loss to follow-up among chronic periodontitis patients with long-term periodontal therapy.Methods　280 patients with moderate to severe chronic periodontitis receiving treatment from Department of Periodontology，Tianjin Medical University Dental Hospital during April to June 2015，were recruited by convenient sampling.A self-developed Clinical and Demographic Questionnaire，Self-efficacy Scale for Self-care（SESS），Dental Fear Scale（DFS） were used to obtain data at baseline.The outcome of loss to follow-up within 20 months after the initial treatment of periodontitis was further recorded.Correlations of SESS score with its dimensions score and DFS score were analyzed.Multivariate Logistic regression analysis was conducted to identify the influencing factors of loss to follow-up in patients with long-term periodontal therapy.Results　160 of 280 patients were lost during follow-up period.The score of SESS was positively correlated with the scores of self-efficacy for dentist consultations（SE-DC），self-efficacy for brushing of the teeth （SE-B），self-efficacy for dietary habits （SE-DH），but negatively correlated with the score of DFS （P<0.05）.The score of DFS was negatively correlated with the score of SE-B（P<0.001）.Older age〔OR=1.042，95%CI（1.012，1.074），P=0.006〕，mild conditions〔OR=4.893，95%CI（2.280，10.499），P<0.001〕，non-surgical periodontal treatment〔OR=11.334，95%CI（2.235，57.472），P=0.003〕 and low-level self-efficacy for oral self-care〔OR=71.899，95%CI（23.926，216.062），P<0.001〕 were risk factors of loss to follow-up in chronic periodontitis patients with long-term periodontal therapy.Conclusion　Age，severity of periodontitis，the way of periodontal treatment and the level of self-efficacy for oral self-care are influencing factors of loss to follow-up in chronic periodontitis patients with long-term periodontal therapy.Healthcare professionals should provide targeted interventions to improve maintenance of long-term periodontal health for patients with at least one of the following characteristics：older age，mild conditions，non-surgical periodontal therapy and low-level self-efficacy for oral self-care.

Key words: Chronic periodontitis, Therapy, Loss to follow-up, Root cause analysis