Variable Without tooth
agenesis 		With tooth
agenesis 		P-value
Mean age (SD) 15.35 (6.87) 13.5 (3.81) 0.16
Gender, N (%)
Male 129 (90.85) 13 (9.15) 0.27
Female 190 (92.68) 15 (7.32)

No statistically significant P > 0.05 (t-test and Chi-square test).
SD = standard deviation; N = number.