Table 2 Estimated marginal means within the mixed-model regression framework

Judge

Expertise

Laypeople

2.107

0.214

1.681

2.533

General Dentist

2.136

0.221

1.697

2.576

Orthodontist

2.525

0.131

2.265

2.784

Sex

Female

1.96

0.182

1.600

2.321

Male

2.522

0.127

2.269

2.775

Age

15-24.9

2.231

0.109

2.014

2.448

25-34.9

2.428

0.105

2.220

2.637

35-44.9

1.954

0.269

1.419

2.490

45-54.9

2.401

0.328

1.749

3.053

Photo model

Face

Short

2.014

0.113

1.790

2.238

Normal

2.426

0.113

2.202

2.650

Long

2.284

0.113

2.059

2.508

Gingival show

0 mm

2.955

0.123

2.711

3.199

2 mm

2.11

0.110

1.891

2.329

4 mm

2.56

0.123

2.316

2.804

6 mm

1.864

0.123

1.620

2.108

Buccal corridor

2%

2.254

0.123

2.010

2.498

10%

2.447

0.123

2.203

2.691

15%

2.504

0.111

2.283

2.724

20%

1.728

0.123

1.484

1.972

25%

1.487

0.123

1.243

1.731