Progress in Orthodontics

Table 8 Comparison of African and Caucasian in-out values

From: Three-dimensional assessment of teeth first-, second- and third-order position in Caucasian and African subjects with ideal occlusion

Africans—in-out				Caucasians—in-out			Comparison
	n	Mean	Standard deviation	n	Mean	Standard deviation	t test	p level
U1	58	1.62	.30	58	1.48	.30	2.60	0.012
U2	58	1.25	.24	58	1.15	.24	2.11	0.039
U3	58	1.65	.31	58	1.66	.34	−.30	ns
U4	58	1.89	.33	58	1.61	.24	5.20	<0.001
U5	58	1.85	.29	58	1.66	.29	3.60	<0.001
U6	58	2.29	.40	58	2.01	.47	3.35	0.001
U7	58	2.47	.56	58	2.75	.62	−2.51	0.015
L1	58	1.18	.21	58	1.01	.32	3.42	0.001
L2	57	1.16	.19	58	.93	.32	4.65	<0.001
L3	58	1.36	.28	58	1.38	.27	−.41	ns
L4	58	2.01	.38	58	1.93	.28	1.30	ns
L5	56	2.06	.45	58	1.91	.32	2.06	0.044
L6	58	2.53	.37	58	2.66	.38	−1.96	ns
L7	56	2.22	.65	58	2.83	.72	−4.76	<0.001

ns not significant.

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