Table 4 Multivariate linear regression analysis results for rating

Sex (female vs. male)

-0.358

-0.474 to -0.242

 < 0.001

Age

0.058

0.041 to 0.075

 < 0.001

Work

(layperson vs. orthodontist)

0.431

0.260 to 0.601

 < 0.001

Degree of asymmetry

of image (mm)

-1.219

-1.286 to -1.151

 < 0.001

Level of degree of asymmetry of image

 Moderate vs. mild

-1.250

-1.384 to -1.115

 < 0.001

 Severe vs. mild

-2.437

-2.572 to -2.831

 < 0.001

Type of asymmetry of image

 Vertical vs. horizontal

-0.045

-0.179 to 0.090

0.514

 Sagittal vs. horizontal

1.233

1.099 to 1.368

 < 0.001

 Sagittal vs. vertical

1.278

1.143 to 1.412

 < 0.001

Part of asymmetry of image

 go vs. mt

1.907

1.752 to 2.063

 < 0.001

 ch vs. mt

1.261

1.106 to 1.416

 < 0.001

 zy vs. mt

2.676

2.520 to 2.831

 < 0.001

 ch vs. go

-0.646

-0.801 to -0.491

 < 0.001

 zy vs. go

0.768

0.613 to 0.924

 < 0.001

 zy vs. ch

1.414

1.259 to 1.570

 < 0.001