Is there a difference in feature change between male and female?

I further divided data to the group of male (79 cases) and female (83 cases), trying to find some difference in results between gender.

1. Total length

Male group has generally 500 unit shorter vessels than female group, but slower decrease trend through age (still shorter all the ages). 

2. Number of branches

Both group starts from nearly the same number, but male group decreases faster through age.

3. Total Volume

Male group decreases faster than female through age.

4. Length comparison in each Order group

Nearly the same in 1st Order group

Female group remains nearly the same, but male decrease slowly in Order group 2 and 3

Both groups decrease, but male group decreases faster

In conclusion, male group has more evident proof to show their sign of aging from brain vessel topology.