Fig 1.
Flowchart of the inclusion and exclusion of subjects in the health insurance claims and check-up database of 2015 provided by MinaCare Co., Ltd.
Table 1.
Characteristics of the population from the medical database used in this study.
BMI; body mass index. Values are means (standard deviation) or percentage. Percentages of those missing data for fasting blood glucose and systolic/diastolic blood pressures were 10.1, <0.1, and <0.1% respectively.
Fig 2.
Number of residual teeth by BMI class in each 10-year age group.
The values are the mean and sample sizes in each age- and BMI- category. Significant linear trend across BMI classes, *; p <0.05, †; p <0.0001.
Fig 3.
Percentage of subjects with residual teeth at each position in groups with non-obesity (BMI <25.0 kg/m2) and obesity (≥25.0 kg/m2) by age groups (30s-60s).
The percentage of subjects with residual teeth was calculated as the proportion of subjects that have a residual tooth at the particular position. The percentage of subjects with residual teeth was compared between the groups with obesity and non-obesity in the same age group, and positions with a significantly lower percentage of subjects having residual teeth are shown in black (p <0.05). OB+: obesity, OB-: non-obesity.
Fig 4.
Percentage of obesity/ non-obesity/ smoking/ non-smoking subjects with residual teeth at each position by age groups (30s-60s).
Percentage of subjects with residual teeth was calculated as the proportion of subjects that have a residual tooth at the particular position. The percentage of subjects with residual teeth was compared among the 4 groups in the same age group, and positions with a significantly lower percentage of subjects having a residual tooth than the expected value are shown in black (p <0.05). OB-; non-obesity, OB+; obesity SM-; non-smoking, SM+; smoking.
Table 2.
The ORs for fewer than 24 residual teeth.