Table 1.
Classification of plaque size according to area on section
Area (μm
2
)
Minimum circular diameter (μm
2
)
Class
A > 14000
133.5
Large
14000 ≥ A > 4000
71.4
Medium
4000 ≥ A > 800
31.9
Small
800 ≥ A ≥ 20
5.04
Very small
A < 20
Excluded
A, Area.