Fortitude

From Colawikki

Fortitude determines by how much CCS Life increases with each level.

When a player levels their maximum life is increased by a base 15 plus an extra increment based on fortitude; this is currently set at fortitude/2.5.

Players should note that during a respec, CCS no longer allows a player to determine stats at each level but instead asks for desired final stat values. Because fortitude is applied at each level, total life depends not only on total fortitude but also on how it was added at each level. The respec page calculates life by applying a simple formula to decide how many fortitude should be allocated at each level.