Table 2 Dentofacial deformity index grading.

From: Development of a 3D cephalometric index to grade severity of dentofacial deformity in patients with juvenile idiopathic arthritis

Outcome variable

Dentofacial deformity index grading

0 point*

1 point*

2 point*

3 point*

4 point*

Domain: asymmetry

 1. Total posterior mandibular height (mm)**

 < − 1.23

− 1.24 to − 2.95

− 2.96 to − 4.94

− 4.95 to − 9.37

 > − 9.37

 2. Mandibular axial angle (Degrees)

 < 0.65

0.66–1.65

1.66–2.82

2.83–4.94

 > 4.94

Domain: vertical deviation

 3. Mandibular inclination (Degrees)

 < 23.54

23.55–29,14

29.15–34.76

34.77–41.2

 > 41.2

 4. Posterior/anterior face ratio

 > 0.79

0.8–0.75

0.74–0.71

0.7–0.66

 < 0.66

Domain: sagittal deviation

 5. Mandibular sagittal position (Degrees)

 > 84.6

84.5–80.93

80.92–76.22

76.21–72.68

 < 72.68

 6. Wits

 < -2,27

− 2.28 to − 0.22

− 0.21 to 1.59

1.6–3.5

 > 3.5

  1. *For each of the six outcome variables: values less than 25th percentile (0 points), values between 26th percentile and the median (1 point), values between the median and 75th percentile (2 points), values between 76th percentile and 90th percentile (3 points), values above 90th percentile (4 points). ** = inter-side difference.
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