Table 4 Association of Oc-a, Oc-b, Oc-Pog, An-a, An-b, Pog-a, Pog-b, Nt-a, Nt-b, Ph-a and Ph-b at rest and smiling

Oc-a Asymmetry index (rest)

Oc-a Asymmetry index (smile)

Pearson Correlation

P-value

.178

.021

Oc-b Asymmetry index (rest)

Oc-b Asymmetry index (smile)

Pearson Correlation

P-value

.337

 < 0.001

Oc-Pog Asymmetry index (rest)

Oc-Pog Asymmetry index (smile)

Pearson Correlation

P-value

.139

.071

An-a Asymmetry index (rest)

An-a Asymmetry index (smile)

Pearson Correlation

P-value

.153

.047

An-b Asymmetry index (rest)

An-b Asymmetry index (smile)

Pearson Correlation

P-value

.398

 < 0.001

Pog-a (rest)

Pog-a (smile)

Pearson Correlation

P-value

.861

 < 0.001

Pog-b (rest)

Pog-b (smile)

Pearson Correlation

P-value

.501

 < 0.001

Nt-a (rest)

Nt-a (Smile)

Pearson Correlation

P-value

.822

 < 0.001

Nt-b (rest)

Nt-b (smile)

Pearson Correlation

P-value

.595

 < 0.001

Ph-a (rest)

Ph-a (smile)

Pearson Correlation

P-value

.771

 < 0.001

Ph-b (rest)

Ph-b (smile)

Pearson Correlation

P-value

.533

 < 0.001