Table 6

Table shows mean scores of ALS cognitive groups on the selected executive and memory tasks and intergroup differences on multiple one-way ANCOVA

No abnormality detectedNECIExecutive dysfunctionIntergroup differences
Mean (SD)nMean (SD)nMean (SD)Np ValueFP.Eta
Attention/executive function
 Brixton spatial anticipation test6.0 (2.0)695.0 (2.1)224.3 (2.3)310.0682.80.05
 Backward digit span task12.0 (3.6)6010.8 (3.5)169.1 (4.1)250.0543.00.06
 Stroop colour word task*25.5 (18.9)5830.4 (18.7)1452.8 (23.7)29<0.000111.40.19
 Phonemic verbal fluency index*10.1 (6.2)5816.3 (12.0)1742.8 (50.2)27<0.000129.50.38
 Category fluency21.4 (8.6)5816.1 (4.2)1711.2 (4.0)31<0.000118.50.27
Memory function
 Logical memory-immediate recall11.5 (3.0)626.8 (3.6)167.8 (2.6)24<0.000116.30.25
 Logical memory-delayed recall11.6 (2.7)616.3 (3.1)168.0 (2.8)24<0.000124.20.34
 Logical memory-retention10.9 (2.2)627.7 (3.1)168.9 (3.2)24<0.000110.00.17
 Auditory delayed recognition task12.4 (2.7)546.8 (3.4)1310.1 (3.0)17<0.000113.40.23
  • * Higher scores indicate worse performance.

  • ALS, amyotrophic lateral sclerosis; ANCOVA, analysis of covariance; NECI, non-executive cognitive impairment; P.Eta, Partial Eta squared.