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Socio-Demographic Risk Indicators for Tooth Mortality in Rural Sri Lankans

Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan, Department of Community Dental Health, Faculty of Dental Science, University of Peradeniya, Peradeniya, Sri Lanka

A.N. Ekanayaka, BDS, PhD

Department of Community Dental Health, Faculty of Dental Science, University of Peradeniya, Peradeniya, Sri Lanka

L. Herath, BDS, PhD

Department of Community Dental Health, Faculty of Dental Science, University of Peradeniya, Peradeniya, Sri Lanka

H. Miyazaki, DDS, PhD

Division of Preventive Dentistry, Department of Oral Health Science, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan, hideomiy{at}dent.niigata-u.ac.jp

To explore the socio-demographic factors associated with tooth loss in rural inhabitants of Sri Lanka, a random sample of 2178 males aged 20-60 years was selected using multistage cluster sampling procedure. The number of missing and present teeth was recorded excluding third molars and the subjects were interviewed to elicit socio-demographic information as well as oral hygiene and tobacco consumption habits. The mean number of teeth lost in the sample was 5.17±5.43. Tooth loss increased significantly with age. Sinhalese had significantly fewer lost teeth (5.05±5.38) compared to Tamils (6.54±6.18) and Muslims (6.02±5.21) whereas education, income, oral hygiene practices and tobacco use were significantly associated with tooth loss in the bivariate analysis. A forward stepwise multiple regression analysis revealed that age, Muslim ethnicity and quantified tobacco use were positively associated with tooth loss while better socio-economic conditions and good oral hygiene habits were negatively linked with tooth mortality independent of other factors. Age, Muslim ethnicity, quantified tobacco use, income, education, brushing frequency and substance used for cleaning had significantly affected tooth loss. Quantified tobacco use and oral hygiene may be regarded as modifiable socio-demographic risk indicators associated with tooth mortality in Sri Lankans. Asia Pac J Public Health 2003; 15(2): 105-110.

Key Words: Age • ethnicity • modifiable factors • oral hygiene • Sri Lanka • tobacco use • tooth mortality.

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