Table 3 Attractiveness scores mean and significance of profession and role of associated structures (NLC, L) by Chinese raters (n = 281) and Black raters (n = 280)

Deviation

NLC scores for Chinese raters

L scores for Chinese raters

p-value

(mm)

Orthodontists (n = 56) mean ± SD

G. Practitioners (n = 56) mean ± SD

Dental students (n = 56) mean ± SD

Art students (n = 57) mean ± SD

Layperson (n = 56) mean ± SD

Orthodontists (n = 56) mean ± SD

G.Practitioners (n = 56) mean ± SD

Dental students (n = 56) mean ± SD

Art students (n = 57) mean ± SD

Layperson (n = 56) mean ± SD

Across profession

NLC x L Results*

0

2.2 ± 0.8

2.2 ± 0.8

2.2 ± 0.9

2.4 ± 0.8

2.0 ± 0.9

2.2 ± 0.8

2.2 ± 0.8

2.1 ± 0.9

2.3 ± 0.9

2.2 ± 0.8

n.s

n.s

1

2.6 ± 0.9

2.5 ± 1.0

2.0 ± 0.7

2.3 ± 0.9

2.0 ± 0.9

2.6 ± 0.9

2.2 ± 1.0

2.0 ± 0.7

2.3 ± 0.9

2.2 ± 0.9

* NLC + L

n.s

2

2.6 ± 0.9

2.3 ± 0.7

1.9 ± 0.8

2.1 ± 0.4

2.1 ± 0.9

2.6 ± 1.0

2.3 ± 0.8

2.0 ± 0.8

2.0 ± 0.9

2.3 ± 0.8

* NLC + L

n.s

3

2.6 ± 1.1

2.5 ± 0.9

2.5 ± 0.7

2.6 ± 1.0

2.2 ± 0.9

2.9 ± 1.1

2.1 ± 1.0

2.4 ± 0.8

2.4 ± 1.2

1.9 ± 0.7

* NLC + L

n.s

4

3.3 ± 0.8

2.7 ± 0.9

2.5 ± 0.8

2.5 ± 1.0

2.2 ± 0.9

3.2 ± 0.9

2.5 ± 0.9

2.7 ± 0.9

2.8 ± 1.6

2.3 ± 0.8

* NLC + L

n.s

5

3.1 ± 0.9

2.9 ± 0.8

2.7 ± 0.8

2.6 ± 0.9

2.3 ± 0.8

3.2 ± 0.8

2.5 ± 1.0

2.7 ± 0.9

2.5 ± 0.9

2.3 ± 1.0

* NLC + L

*

Deviation

NLC scores for Black raters

L scores for Black raters

p-value

(mm)

Orthodontists (n = 56) mean ± SD

G. Practitioners (n = 56) mean ± SD

Dental students (n = 56) mean ± SD

Art students (n = 56) mean ± SD

Laypersons (n = 56) mean ± SD

Orthodontists (n = 56) mean ± SD

G. Practitioners (n = 56) mean ± SD

Dental students (n = 56) mean ± SD

Art students (n = 56) mean ± SD

Laypersons (n = 56) mean ± SD

Across profession

NLC x L Results*

0

2.3 ± 0.9

2.3 ± 0.8

2.5 ± 1.5

2.2 ± 0.8

2.2 ± 0.8

2.2 ± 0.8

1.9 ± 0.9

2.4 ± 0.8

2.1 ± 0.8

2.2 ± 0.9

n.s

*

1

2.6 ± 0.7

2.1 ± 1.0

2.5 ± 0.8

2.1 ± 0.9

2.3 ± 0.8

2.7 ± 1.0

1.5 ± 0.7

2.5 ± 0.8

2.2 ± 0.9

2.0 ± 0.8

* NLC + L

*

2

2.7 ± 0.8

2.3 ± 0.8

2.6 ± 1.2

2.3 ± 0.6

2.2 ± 1.1

2.6 ± 1.0

2.0 ± 0.9

2.5 ± 1.1

2.6 ± 0.9

2.1 ± 1.0

* NLC + L

n.s

3

2.8 ± 0.7

2.3 ± 0.8

3.0 ± 0.8

2.4 ± 0.8

2.2 ± 0.8

2.8 ± 0.8

2.4 ± 0.8

2.9 ± 0.9

2.1 ± 1.4

2.3 ± 1.0

* NLC + L

n.s

4

3.2 ± 0.8

2.9 ± 0.9

3.1 ± 0.9

2.5 ± 0.9

2.4 ± 1.1

3.4 ± 0.9

2.2 ± 0.9

3.5 ± 0.9

2.0 ± 0.8

2.2 ± 1.0

* NLC + L

*

5

3.4 ± 0.8

2.8 ± 0.9

3.5 ± 1.4

2.3 ± 0.8

2.3 ± 1.0

3.4 ± 0.8

2.5 ± 0.9

3.8 ± 0.8

2.4 ± 0.8

2.5 ± 0.8

* NLC + L

n.s