Epidemiology and Risk Factors of Tooth Loss among Iranian Adults: Findings from a Large Community-Based Study

Table 2

Distribution of the number of missing teeth across different categories of demographic and clinical characteristics.

Characteristics	Number of lost teeth
	0	<6	≥6	Edentulism
Sex
Male	726 (22.6%)	1997 (61.5%)	370 (11.5%)	142 (4.4%)	𝑃<0.001^a
Female	1712 (38.5%)	2522 (56.7%)	187 (4.2%)	25 (0.6%)
Age	33.3±7.3	37.7±7.7	44.0±6.8	47.9±6.9	𝑃<0.001^b
Education
Diploma and lower	640 (19.8%)	2029 (63%)	414 (12.9%)	137 (4.3%)	𝑃<0.001^a
Bachelor	1556 (40.3%)	2169 (56.1%)	118 (3.1%)	21 (0.5%)
Master and doctorate	274 (45.4%)	316 (52.2%)	13 (2.1%)	2 (0.3%)
Body mass index	24.4±7.7	25.3±4.1	25.8±4.3	25.8±4.7	𝑃<0.001^b
Smoking
Former smokers	38 (10.7%)	209 (58.9%)	81 (22.8%)	27 (7.6%)	𝑃<0.001^a
Nonsmokers	2154 (34.5%)	3697 (59.2%)	327 (5.2%)	68 (1.1%)
Smokers	27 (8.7%)	148 (47.9%)	75 (24.3%)	59 (19.1%)
Hyperlipidemia
Yes	134 (20.8%)	414 (64.2%)	76 (11.8%)	21 (3.3%)	𝑃<0.001^a
No	2378 (33%)	4189 (58.1%)	490 (6.8%)	148 (2.1%)
Hypertension
Yes	56 (19.2%)	190 (65.1%)	35 (12%)	11 (3.8%)	𝑃<0.001^a
No	2456 (32.5%)	4413 (58.4%)	531 (7%)	158 (2.1%)
Diabetes mellitus
Yes	27 (16.3%)	104 (62.7%)	28 (16.9%)	7 (4.2%)	𝑃<0.001^a
No	2485 (32.3%)	4499 (58.6%)	538 (7%)	162 (2.1%)

aChi-square test.
^bOne-way ANOVA.