Table 2.

Differences in the perception of attractiveness of anterior crowding and spacing with and without upper lips position and according to demographic characteristics and groups.

Case	Demographics			Groups
	Gender	Age	History of orthodontic treatment
Mild crowding
Without lips	0.480	0.493	0.961	0.002
With lips	0.195	0.371	0.231	0.002
Moderate crowding
Without lips	0.037	0.102	0.152	0.796
With lips	0.708	0.897	0.232	0.015
Severe crowding
Without lips	0.485	0.316	0.940	0.070
With lips	0.753	0.612	0.657	0.001
Mild spacing
Without lips	0.211	0.045	0.817	0.583
With lips	0.611	0.323	0.048	0.009
Moderate spacing
Without lips	0.428	0.059	0.635	0.069
With lips	0.490	0.164	0.962	0.006
Severe spacing
Without lips	0.865	0.091	0.798	0.004
With lips	0.205	0.154	0.437	0.616