Box 1.

Neurocognitive Assessment Battery Administered in FHN Trials.

Global cognitive function

Modified Mini-Mental State Examination

Executive function

Trail-Making Test, Form B

Attention

Digit Symbol Substitution Test (Daily Trial) *

Digit Symbol Coding (Nocturnal Trial) *

Trail-Making Test, Form A*

Psychomotor speed

Grooved pegboard (Daily Trial) *

Memory

Rey Auditory Verbal Learning Test, immediate and delayed recall *

Letter-Number Sequencing *

Verbal fluency

Controlled Oral Word Association Test*

^*indicates tests administered to a subset of FHN participants

FHN, Frequent Hemodialysis Network