Table 1:

Inclusion and exclusion criteria for PPA diagnosis

Criteria

Inclusion

Most prominent clinical feature is language difficulty

These deficits are the principal cause of impaired daily living activities

Aphasia should be the most prominent deficit at symptom onset and for the initial phases of the disease

Exclusion

Pattern of deficits is better accounted for by other nondegenerative nervous system or medical disorders

Prominent initial episodic memory, visual memory, and visuoperceptual impairments

Prominent initial behavioral disturbance