Cumulative Hair Thickness
Cumulative Hair Thickness shows the total thickness of all hairs within one square centimetre of the scalp. It is expressed in mm/cm².
It is calculated using two parameters:
Hair density × Average hair thickness
For example:
Hair density: 200 hairs/cm²
Average hair thickness: 60 μm
Calculation:
200 × 60 μm = 12,000 μm = 12 mm/cm²
The Cumulative Hair Thickness is therefore 12 mm/cm².
How to understand the result
A higher value usually means that the examined area contains:
more hairs,
thicker hairs,
or a combination of both.
A lower value may result from:
reduced hair density,
thinner or miniaturised hairs,
or both.
This parameter is particularly useful for follow-up examinations because it can show an overall improvement or deterioration even when changes in density or hair thickness alone are relatively small.
For example, the number of hairs may remain similar, but if the hairs become thinner, Cumulative Hair Thickness will decrease.