A Comparative Study of Palatal Rugae Patterns among Igbo and Ikwerre Ethnic Groups of Nigeria: A University of Port Harcourt Study

Table 5

Association between the individual pattern (based on sides) and the tribe with respect to sex.

	Sides	Ikwerre		Igbo		DF	Chi-square ()	Critical value	Chi () calculated value	Inference
		Male	Female	Male	Female
Wavy	Left	61	57	79	103	3	1.55	7.81	0.67	No significant association
	Right	58	60	82	85
Curvy	Left	78	52	49	44	3	0.51	7.81	0.92	No significant association
	Right	73	47	38	38
Circular	Left	4	6	7	7	3	0.39	7.81	0.94	No significant association
	Right	8	8	12	14
Straight	Left	17	20	13	8	3	1.54	7.81	0.67	No significant association
	Right	16	14	6	7
Converging	Left	5	3	5	1	3	3.20	7.81	0.67	No significant association
	Right	2	4	5	4
Diverging	Left	6	14	5	1	3	0.39	7.81	0.94	No significant association
	Right	7	4	11	2