Table 2 Significant correlations between different indices and facial symmetry criteria

Oc-b Asymmetry index (difference)

Pearson Correlation

-.098

.102

.053

.011

.166

P-value

.204

.185

.495

.888

.031

Oc-Pog Asymmetry index (difference)

Pearson Correlation

.012

-.043

-.005

.041

.158

P-value

.881

.579

.944

.593

.041

An-b Asymmetry index (difference)

Pearson Correlation

-.094

.343

.129

.079

.023

P-value

.223

 < 0.001

.094

.307

.764

Nt-a (difference)

Pearson Correlation

.211

-.048

.021

.018

.102

P-value

.006

.536

.783

.817

.186

Nt-b (difference)

Pearson Correlation

-.049

.317

-.160

.011

-.138

P-value

.526

 < 0.001

.038

.891

.074

Ph-a (difference)

Pearson Correlation

.235

-.085

.042

-.071

.051

P-value

.002

.274

.586

.362

.511

Ph-b (difference)

Pearson Correlation

-.013

.294

-.143

-.184

.040

P-value

.872

 < 0.001

.063

.016

.601

Oc-b Asymmetry index (smile)

Pearson Correlation

.101

.154

-.019

-.038

.019

P-value

.192

.046

.808

.621

.811

An-a Asymmetry index (smile)

Pearson Correlation

-.036

.034

.122

.232

.061

P-value

.641

.662

.114

.002

.434

An-b Asymmetry index (smile)

Pearson Correlation

.048

.302

.071

-.021

.050

P-value

.535

.000

.357

.782

.520

Pog-a (smile)

Pearson Correlation

.591

.084

-.001

.043

.027

P-value

.000

.280

.985

.579

.727

Nt-a (smile)

Pearson Correlation

.802

.039

-.020

.050

-.025

P-value

.000

.613

.793

.517

.748

Nt-b (smile)

Pearson Correlation

.035

.479

.145

.142

.124

P-value

.649

.000

.060

.066

.109

Ph-a (smile)

Pearson Correlation

.588

.065

-.057

.030

.029

P-value

.000

.402

.465

.703

.709

Ph-b (smile)

Pearson Correlation

-.007

.207

.050

.060

-.001

P-value

.925

.007

.515

.438

.988