Table 2.
Population characteristics according to sex, ethnicity, angles average (SNA, SNB, ANB and SN-GoGn) and age – Patients with and without third molar agenesis.
| Total n | Third Molar Agenesis | No Third Molar Agenesis | p-value | |
|---|---|---|---|---|
| 831a | 93 (11.2%) | 738 (88.8%) | ||
|
| ||||
| Sex | n (%) | 0.754 * | ||
| Male | 388 (46.7) | 42 (45.2) | 346 (46.9) | |
| Female | 443 (53.3) | 51 (54.8) | 392 (53.1) | |
| Ethnicityb | 0.56 * | |||
| White | 400 (48.1) | 49 (52.7) | 351 (47.6) | |
| Black | 305 (36.7) | 29 (31.2) | 276 (37.4) | |
| Angles Average | Mean (DP) | |||
| SNA | 82.62 ( ± 4.4) | 83.02 ( ± 4.35) | 82.57 ( ± 4.42) | 0.35 ** |
| SNB | 79.38 ( ± 4.6) | 80.08 ( ± 4.99) | 79,29 ( ± 4.51) | 0.12 ** |
| ANB | 3.25 ( ± 3.8) | 2,96 ( ± 4.01) | 3.28 ( ± 3.82) | 0.44 ** |
| SN-GoGn | 37.07 ( ± 6.3) | 36.9 ( ± 7.9) | 37.09 ( ± 6.06) | 0.79 ** |
| Age | 14.11 ( ± 7.1) | 14 ( ± 6.4) | 14.12 ( ± 7.19) | 0.876 ** |
Notes:
*
Indicates chi-square test;
**
Indicates Student’s t test.
All p-values were not significant (p > 0.05).
a
216 patients were excluded because it was not possible to confirm the status of the third molars.
b
It was not possible to classified 126 (15.2%) patients as either Black or White and they were excluded.