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Table 1 Cognitive tests used

From: Non-sedation versus sedation with a daily wake-up trial in critically ill patients recieving mechanical ventilation - effects on long-term cognitive function: Study protocol for a randomized controlled trial, a substudy of the NONSEDA trial

Test

Description

Cognitive domain evaluated

Span of numbers [28]

Repeating a progressively longer sequence of numbers, first forwards, then backwards, then naming digits in numerical order

Attention/concentration

Coding test [28]

Translating numbers into figures using an answer key

Mental pace

Trailmaking A [29]

Drawing a line between consecutive numbers during a timed period

Mental pace

Trailmaking B [29]

Drawing a line between alternating numbers and letters during a timed period

Executive function

Rey auditory verbal learning test (immediate and recall) [30]

Repeating 15 words 5 times after hearing them aloud, and then again after 30 min as recalled

Verbal learning/memory

Rey-Ostherrieth complex figure test (immediate copy) [30]

Copying a drawing of a complicated geometrical figure while looking at it

Visual construction

Rey-Ostherrieth complex figure test (30-min delayed recall and recognition) [30]

Drawing the geometrical figure from memory after 3 and 30 min, and recognizing pieces from it from a catalog

Visual learning/memory

Verbal fluency test (S-words and animals) [31]

Naming as many words as possible beginning with S, and animals during 1 min each

Executive function/mental flexibility