Table 3 Subtests of the neuropsychological assessment battery used for diagnosis of POCD
Test variable | Test description | Domain tested |
|---|---|---|
CERAD-NAB word list-encoding | Total number of correctly learned words across three learning trials (number of words per trial = 10) | Verbal episodic learning |
CERAD-NAB word list-delayed free recall | Total number of correctly remembered words after a delay following encoding | Verbal episodic memory |
CERAD-NAB word list-savings | Proportion of correctly recalled words during delayed free recall relative to words learned in learning trial 3 | Verbal episodic memory |
CERAD-NAB word list-discriminability | Rate of correctly recognized words from encoding | Verbal episodic memory |
CERAD-NAB word list-intrusion errors | Total number of intrusions committed during word list-encoding and -delayed free recall | Executive functions |
CERAD-NAB figures-copy | Copy of four figures (circle, diamond, overlapping rectangles, cube) | Visuospatial ability |
CERAD-NAB figures-delayed recall | Number of correctly reproduced figures from figures-copy following a delay | Visual memory |
CERAD-NAB figures-savings | Proportion correctly reproduced figures at figures-delayed recall relative to figures-copy | Visual memory |
Semantic fluency-animals | Number of animals produced within 1 min | Semantic memory |
Boston naming test (15-items) | Number of spontaneously correctly named black and white line drawings (maximum = 15) | Language |
Trail making test A | Time required to connect circles numbered from 1 to 25 in ascending order | Psychomotor speed |
Trail making test B | Time required to connect circles containing numbers (1–13) and letters (A-L) in ascending and alternating order | Executive functions |
Phonemic fluency | Number of words starting with the letter S produced within 1 min | Executive functions |