| Variable | <10 IU/L | ≥10 IU/L | P |
| No. of subjects | 86 (24.9) | 260 (75.1) |
|
| Age in years | 24.3 (7.1) | 27.2 (6.3) | <0.001 |
| Males | 57 (66.3) | 126 (48.5) |
|
| School Attended |
|
|
|
| School of dental medicine | 35 (40.7) | 88 (33.9) |
|
| Healthcare profession school (dental hygienists) | 44 (51.2) | 95 (36.5) |
|
| Postgraduate dental school | 7 (8.1) | 77 (29.6) |
|
| Vaccinated |
|
|
|
| In infancy | 55 (64.0) | 142 (54.6) | <0.001 |
| At 12 years of age | 31 (36.0) | 118 (45.4) |
|
| Time in School (years) | 1.8 (2.2) | 2.9 (2.7) | <0.001 |
| Boby Mass Index | 23.9 (2.4) | 22.8 (3.5) | <0.001 |