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. Author manuscript; available in PMC: 2018 Apr 16.
Published in final edited form as: J Alzheimers Dis. 2018;61(3):917–928. doi: 10.3233/JAD-170555

Table 3.

Backward digit span errors: means and standard deviations

Transposition Errors non-MCI
(n = 33)		 aMCI
(n = 15)		 mixed/dys MCI
(n = 18)		 significance
total transposition errors 3.75 (3.48) 4.80 (3.12) 9.05 (5.29) mixed/dys MCI > non-MCI; p < 0.001
mixed/dys MCI > aMCI; p < 0.01
total anticipation transposition errors 2.24 (2.12) 2.93 (1.75) 5.11 (3.30) mixed/dys MCI > non-MCI; p < 0.001
mixed/dys MCI > aMCI; p < 0.039
total postponement transposition errors 1.51 (1.58) 1.86 (1.59) 3.94 (2.43) mixed/dys MCI > non-MCI; p < 0.001
mixed/dys MCI > aMCI; p < 0.006
average anticipation displacement 0.56 (0.53) 0.68 (0.44) 1.27 (0.82) mixed/dys MC I > non-MCI; p < 0.001
mixed/dys MCI > aMCI; p < 0.021
average postponement displacement 0.37 (0.39) 0.46 (0.39) 0.98 (0.60) mixed/dys MCI > non-MCI; p < 0.001
mixed/dys MCI > aMCI; p < 0.006
total omissions 0.09 (0.39) 0.46 (0.63) 0.61 (0.91) mixed/dys MCI > non-MCI; p < 0.022
total dysexecutive errors 2.78 (2.25) 3.73 (2.25) 4.94 (3.26) mixed/dys MCI > non-MCI; p < 0.017
total errors 2.87 (2.45) 4.20 (2.36) 5.55 (3.51) mixed/dys MCI > non-MCI; p < 0.005

aMCI, amnestic mild cognitive impairment; mixed/dys MCI, multi-domain/dysexecutive mild cognitive impairment; ns, not significant.