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

Table 3

Association of tribe and the distribution of individual rugae shape with sex.

	Tribe		DF	Chi square ()	Critical value	Chi () calculated value	Inference
	Igbo	Ikwerre
Wavy
Male	161	119	1	1.039	3.84	0.31	No significant association
Female	188	117
Curvy
Male	19	12	1	0.011	3.84	0.91	No significant association
Female	21	14
Circular
Male	87	151	1	3.270	3.84	0.07	No significant association
Female	82	99
Straight
Male	19	33	1	0.397	3.84	0.53	No significant association
Female	15	34
Converging
Male	10	7	1	0.829	3.84	0.36	No significant association
Female	5	7
Diverging
Male	16	13	1	8.642	3.84	0.003	Significant association *
Female	3	18

The asterisks were used to demonstrate values with significant difference.