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. 2020 Nov 10;20:312. doi: 10.1186/s12903-020-01300-6

Table 2.

Multivariable regression analysis of the association between multiple indices and complexity level

Index Regression coefficient (β)
(95% CI)
p value
Dental model analysis
Overjet* 0.18 (0.09, 0.27)  < 0.001
Overbite* 0.14 (0.08,0.20)  < 0.001
Crowding* 0.43 (0.24, 0.61)  < 0.001
Molar relationship* 0.23 (0.14, 0.33)  < 0.001
Spacing (the largest) −0.01 (−0.17, 0.16) 0.96
Posterior teeth* 0.17 (0.11, 0.24)  < 0.001
Other model analysis* 0.15 (0.08, 0.22)  < 0.001
Radiographic examinations
ANB* 0.23 (0.04, 0.22) 0.006
U1-SN* 0.23 (0.14, 0.32)  < 0.001
SN-MP* 0.24 (0.03, 0.44) 0.02
Other radiographic examinations 0.06 (−0.04, 0.17) 0.23
Clinical examinations
E-line* 0.21 (0.14, 0.32)  < 0.001
Gummy smile 0.18 (−0.09, 0.45) 0.18
Other clinical examinations* 0.08 (0.01, 0.16) 0.03

*p < 0.05 indicates statistical significance