Noctis is correct.

Parry stat = Parry rate. Parry is listed in the defenses section just under Defense

Block is special, where your block rate is specifically determined by your shield. There is no way to increase the block rate of your shield except through Dex.

Strength effects the amount of damage mitigated by both Block and Parry.

The Parry stat on items increases the Parry stat, which increases your parry rate, not the parry strength. There is no "Block" stat on items.