Parameters Skeletal class I Holdaways norms
NP 12.65 14-24mm
SK.Convexity 6.30 -2to+2mm
SN-HLine 6.05 3-7mm
USD 3.85 1-4mm
ULT 17.80 13-14mm
ULS 3.78 No norms
LL-HLine -2.44 1-4mm
LLS-HLine 5.68 No norms
Pog-Pog 11.23 10-12mm
H angle 19.03 7-14 degree
F angle 99.75 91±7 degree
Table 4: Comparison of skeletal Class I norms with Holdaways Norms.