Table 4:

Transverse venous sinus anatomy patterns by age

	Age Category (Years)
	<1	1–5	6–10	11–15	16–20	P Value
No. patients in each age category	25	24	21	70	289	–
Codominant (No. of patients) (% of age group)	12 (48.0)	12 (50.0)	8 (38.1)	37 (52.9)	177 (61.2)	.14
Right-dominant	8 (32.0)	4 (16.7)	9 (42.9)	22 (31.4)	76 (26.3)	.18
Left-dominant	3 (12.0)	6 (25.0)	3 (14.3)	9 (12.9)	23 (8.0)
Right-atretic	1 (4.0)	1 (4.2)	0 (0.0)	1 (1.4)	3 (1.0)	.81
Left-atretic	1 (4.0)	1 (4.2)	1 (4.8)	1 (1.4)	10 (3.4)

Note:—– indicates that no P-value was calculated.