J Korean Acad Oral Health.  2014 Dec;38(4):263-269. 10.11149/jkaoh.2014.38.4.263.

Logistic regression analysis of factors affecting the survival of central incisors in Korean adults

• Kim JB
• Chung SS
• Lee HJ
• Kim YS
• Jeon JG
• Chang KW

• KMID: 2321469
• DOI: http://doi.org/10.11149/jkaoh.2014.38.4.263

Abstract

OBJECTIVES
This study aimed to analyze the variables affecting the survival of the four permanent central incisors in an adult Korean population using logistic regression analysis.
METHODS
The Korean government has been collecting oral health data at the national level at 3-yearly intervals since 2000. In addition, a national survey was conducted in 2006 of 15,777 persons aged 2 to 95 years old who were stratified by age, gender, and region. The raw data were input and the relationship between each of eight objective variables and tooth survival was analyzed by frequency, crosstabulation, and logistic regression analysis, with age, gender, and economic status as functional variables. The inclusion level was alpha=0.05 and the exclusion level was alpha=0.10. The eight variables were age, economic status (jobs), monthly family income, gender, frequency of toothbrushing per day, presence of diabetes, education level, and smoking years.
RESULTS
The survival rate of the incisors decreased with an increase in age, while that in individuals who engaged in farming, stock breeding, and fishing was 5 to 7 times lower than that in individuals in top positions in terms of jobs and society. Further, the survival rate in individuals with diabetes was 2 to 3 times higher than in those without diabetes.
CONCLUSIONS
The most significant predictor of the survival rate of the four permanent incisors in Korean adults was age, followed by economic status and presence of diabetes.

Keyword

Central incisor; Korean; Logistic regression; Survival rate of teeth

MeSH Terms

Adult*
Breeding
Education
Humans
Incisor*
Logistic Models*
Oral Health
Smoke
Smoking
Survival Rate
Tooth
Toothbrushing
Smoke

Figure

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  Fig. 1. Survival rate of 4 incisors. #11: maxillary right central incisor, #21: maxillary left central incisor, #31: mandibular left central incisor, #41: mandibular right central incisor. Survival rate= Number of present teeth /number of teeth examined×100 (%).

Reference

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