There are none, but I would use a variant of 3E rules.
Middle age(human 40+) -2 to one physical ability(str,dex,con), +2 to one mental ability(int,wis,cha)
Old age(human 60+) -2 to other two physical abilities, +2 to one other mental ability
Very old age(human 80+) aditional -2 to all psysical abilities, +2 to third mental ability.
So very old human(80+ yrs) would have -4 to all psysical abilities and +2 to all mental(this ofcource applies only to perfect health in those years, no dementia, arthritis, etc...)