Question about damage Dex vs. (Str + Attack power)

[knite23]

a theory to be tested str to atk: the more and more i play around with str gear attack gear and my dex gear the more i think that strength doesn't convert to atk on a point by point basis but a percentage of your str is treated as atk

[Coglin]

I have notices alot of stats have a 10% modifier, such as SS/Protect are modified 10% by vitality. Meaning 10 vitality adds 1 def to protects buff. Perhaps STR is 10 str for one ATK?