Table 6.

Main Contributing Factors to Open Gingival Embrasure Spaces by Multiple Ordinary Logistic Regression Analysis^a

	B	SE	Significance	OR
Maxilla
Age, y	0.064	0.033	NS	1.066
Horizontal movement of U1, mm	−0.169	0.072	*	0.845
Distance from ICP to ABC at T2, mm	0.693	0.331	*	1.999
A-P overlapped distance, mm	0.791	0.397	*	2.206
Mandible
Δ IMPA, °	−0.073	0.039	NS	0.93
Vertical movement of L1, mm	−0.111	0.106	NS	0.89
Distance from ICP to ABC at T1, mm	0.189	0.410	NS	1.21
Distance from ICP to ABC at T2, mm	1.133	0.457	*	3.10
Δ Distance from ICP to ABC, mm	0.907	0.610	NS	2.48
Crown ratio	3.127	1.937	NS	22.81

^aMultiple ordinary logistic regression analysis was used. B indicates beta coefficient; SE, standard error; OR, odds ratio; NS, not significant; U1, maxillary incisor; ICP, inteproximal contact point; ABC, alveolar bone crest; T1, before treatment; T2, after treatment; Δ, T2-T1; A-P, antero-posterior; IMPA, incisor mandibular plane angle; L1, mandibular incisor.

^*P < .05.