[Epidemiological investigation and analysis of risk factor of tooth loss in older people aging 65-74 years in Shanghai].

To investigate tooth loss status and associated risk factors in older adults aging 65-74 years in Shanghai. Seven hundred and seventy-six participants aging between 65-74 years were randomly selected in a cross-sectional study according to the requirements of the fourth national oral health epidemiological investigation of China. Data was obtained via questionnaires and clinical examination. Non-parametric analysis was performed to compare the numbers of lost teeth and molars between groups. Logistic regression analysis was performed to assess risk factors for tooth loss with SPSS 21.0 software package. The average numbers of lost teeth and lost molars were 5.94 and 2.59, respectively. 42.3% subjects had periodontal pockets and 83.0% had at least 4 mm attachment loss. Males lost more teeth and molars than females (P<0.05). Smoking was a risk factor for maintaining functional dentition, especially when the smoking amount reached 6/d (odds ratio=1.88, 95% confidence interval: 1.231-2.872, P<0.01). Less than 6 years schooling and occupation requiring hard physical labor were also important risk factors for tooth loss. Gender, oral hygiene habits, smoking, educational level and occupation are important risk factors for tooth loss in 65-74 year old adults in Shanghai.