Table 3.

Comparison of morphological variations of P1.

Variation type of P1	Present study %	Kapoor et al. [4]	Alpers et al. [5]	Al-Hussain et al. [6]
Absent	2.35	—	—	—
Hypoplasia	5.29	10.6	6.3	1
Duplication	2.35	2.4	—	—
Fenestration	1.17	—	—	—
SCA + P1 stem	1.76	—	—	—