Morphological Study of Palatal Rugae in a Sudanese Population

Table 2

Descriptive statistics for palatal rugae shapes in both sexes.

Shape	Males				Females				Chi-square test
	Number	%	Mean	SD	Number	%	Mean	SD	Chi-square value	Degree of freedom	value
Straight	160	24.06	3.20	1.69	140	22.54	2.80	1.87	8.937	9	0.408
Curve	185	27.82	3.70	1.91	158	25.44	3.16	1.50	10.089	8	0.229
Wavy	184	27.67	3.68	1.56	194	31.24	3.88	1.53	7.429	7	0.378
Circular	16	2.41	0.32	0.59	15	2.42	0.30	0.58	0.174	2	1.000
Branch	40	6.02	0.80	0.93	35	5.64	0.70	0.74	2.133	3	0.585
Crosslink	5	0.75	0.10	0.30	9	1.45	0.18	0.39	1.329	1	0.249
Angular	30	4.51	0.60	0.81	27	4.35	0.54	0.93	2.849	4	0.690
Nonspecific	14	2.11	0.28	0.54	10	1.61	0.20	0.40	1.705	2	0.601
Converging	21	3.16	0.42	0.61	16	2.58	0.32	0.55	0.840	2	0.682
Diverging	10	1.50	0.20	0.45	17	2.74	0.34	0.63	2.289	3	0.659