Table 3. The number of natural teeth categorized by body mass index.

Body mass index	Model
<18.5 (underweight)	22.6 ± 0.2
18.5 ≤ x < 23 (normal)	23.7 ± 0.1
23 ≤ x < 25 (overweight)	24.3 ± 0.1
25 ≤ x < 30 (obesity)	24.4 ± 0.1
≥30 (extreme obesity)	24.0 ± 0.2
P-value	<0.0001

Data are presented as means ± standard error.

Model: age, sex, smoking, drinking, exercise, income, education, metabolic syndrome, stress, and frequency of toothbrushing adjusted.