Investigation of Hypodontia as Clinically Related Dental Anomaly: Prevalence and Characteristics
Table 2
Prevalence of hypodontia according to the type of dental clinic, gender, age subgroups, and the type of malocclusion.
Variables (Total = 3,055)
(%)
Odds ratio*
95% CI
P-value†
Normal
Hypodontia
Hospital characteristics
Private local clinic
1413 (89.7%)
163 (10.3%)
1.212
0.966, 1.513
.515†
University hospital
1,298 (87.8%)
181 (12.2%)
Gender
Male
1,090 (90.5%)
115 (9.5%)
1.342
1.06, 1.697
.515†
Female
1,621 (87.6%)
229 (12.4%)
Age subgroups
9~19
1,880 (89.4%)
224 (10.6%)
1.172
0.919, 1.494
.201†
20~30
788 (88.9%)
110 (11.1%)
Malocclusion classification
.163‡
Class I
862 (87.5%)
123 (12.5%)
Class II division 1
925 (89.8%)
105 (10.2%)
Class II division 2
60 (83.3%)
12 (16.7%)
Class III
864 (89.3%)
104 (10.7%)
Total
2711 (88.7%)
344 (11.3%)
*Mantel-Haenszel common odds ratio estimates. † Homogeneity of odds ratio was tested using the Breslow-Day test. ‡Difference of prevalence among malocclusion classifications was tested using Fisher’s exact test.
