How frequent are attacks of calcium pyrophosphate dihydrate crystal deposition disease (CPPD, or pseudogout)?

How frequent are attacks of calcium pyrophosphate dihydrate crystal deposition disease (CPPD, or pseudogout)?

Deposits of CPPD crystals occur over a long period of time. Like gout, CPPD attacks can recur from time to time in the same joint or different joints. The initial attack may last a week to two weeks (or sometimes even longer) unless it's treated.

Over time, CPPD attacks may occur more often, involve more joints, have more severe symptoms and last longer. Frequency of attacks varies. Attacks may occur from once every few weeks to less than once a year. However, frequent, repeated attacks can damage the joints.