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Table 4 Score ranges, percentiles, and distribution parameters for the traditional test scores and CFC scores

From: Assessing cognition and daily function in early dementia using the cognitive-functional composite: findings from the Catch-Cog study cohort

 

Score range

Percentiles

Distribution

Original

Current sample

5

10

25

50

75

90

95

Skewness

Kurtosis

ADAS-Cog

0–80

6–47

14

16

19

26

30

35

40

.236

.217

ADCS-ADL

0–78

39–78

47

55

60

68

73

75

77

− .902

.477

CDR-SB

0–18

0–12

.5

.7

2.0

3.5

5.5

7.0

8.7

.596

.142

ADCOMS

0–1.47

.05–1.21

.10

.15

.28

.43

.61

.86

.99

.620

− .042

A-IADL-Q

N.A.

− 2.01–1.95

− 1.71

− 1.32

− .64

.00

.63

1.04

1.42

− .091

− .457

Cognitive Composite

N.A.

− 1.44–1.33

− 1.13

− .88

− .52

− 0.04

.40

.81

.96

− .046

− .445

CFC

N.A.

− 1.51–1.37

− 1.14

− .87

− .42

− 0.04

.38

.78

.88

− .136

− .440

  1. Abbreviations: ADAS-Cog Alzheimer’s Disease Assessment Scale–Cognitive subscale, ADCOMS Alzheimer’s Disease Composite Score, ADCS-ADL Alzheimer’s Disease Cooperation Study–Activity of Daily Living, CDR-SB Clinical Dementia Rating Sum of Boxes, CFC cognitive-functional composite