We have the below snippet from the description of the Curse of the Evil Eye ability from Fomorian's statblock. (MM. Page 136)
...On a failed save, the creature is also cursed with magical deformities. While deformed, the creature has its speed halved and has disadvantage on ability checks, saving throws, and attacks based on Strength or Dexterity.
The question is: are all the things the affected creature gains disadvantage to only related to Strength and Dexterity? Or do they have disadvantage on all saving throws and ability checks?