Information
from the Questionnairea
Information from Dental Records N (%)
At least one third molar missing,
no information on removal
At least one third molar extraction All four third molars present Total
Third molars not removed 314 (69.2) 27 (6.0) 113 (24.8) 454 (100)
Third molars removed 193 (59.9) 20 (37.3) 9 (2.8) 222 (100)

aInformation was missing for 33 participants.