Behavioural Neurology

Research Article

The Tree-Drawing Test (Koch’s Baum Test): A Useful Aid to Diagnose Cognitive Impairment

Table 3

Quantitative analysis of trees and significant differences between groups.

FTD

MCI

Controls

Controls versus

AD versus

FTD versus

VD versus

Mean ± SD

FTD

MCI

FTD

MCI

MMSEc

17.61 ± 3.89

18.68 ± 6.42

19.52 ± 3.28

26.09 ± 1.77

28.04 ± 1.42

****

n.s.

***

****

n.s.

****

Trunk-to-crown ratio

12.62 ± 7.59

12.75 ± 4.91

12.29 ± 6.12

11.04 ± 5.37

8.35 ± 3.72

****

***

n.s.

Crown ratio

1.51 ± 0.61

1.63 ± 0.57

1.68 ± 0.73

1.53 ± 0.45

1.45 ± 0.48

n.s.

Tree size-relative-to-page space

0.03 ± 0.03

0.13 ± 0.11

0.1 ± 0.68

0.08 ± 0.06

0.23 ± 0.19

****

n.s.

****

Tree height

52.09 ± 24.04

109.89 ± 38.98

91.41 ± 28.35

80.77 ± 28.87

132.61 ± 57.81

****

Tree width

35.86 ± 21.14

70 ± 39.08

65.43 ± 26.86

56.67 ± 25.6

96.57 ± 41.67

****

n.s.

Trunk height

26.64 ± 15.34

56.74 ± 22.83

45.87 ± 21.11

38.11 ± 17.71

52.73 ± 23.74

****

n.s.

****

Trunk width

8.13 ± 7.25

13.58 ± 10.32

11.02 ± 7.99

9.85 ± 6.84

13.23 ± 7.78

****

n.s.

Trunk’s tilt

89.39 ± 8.79

86.89 ± 4.65

88.09 ± 5.64

89.59 ± 6.14

90.7 ± 4.21

n.s.

Crown height

23.86 ± 13.11

47.47 ± 21.12

41.04 ± 15.67

38.34 ± 16.47

72.46 ± 39.22

****

n.s.

Crown width

34.71 ± 21.86

75.11 ± 39.53

64.8 ± 26.58

56.48 ± 25.54

95.91 ± 41.22

****

n.s.

Root height

1.59 ± 4.63

5.68 ± 8.7

4.5 ± 8.45

4.31 ± 7.83

7.42 ± 13.34

****

n.s.

Root width

3.53 ± 12.13

15.84 ± 23.13

9.41 ± 16.48

9.33 ± 16.89

18.44 ± 32.19

****

n.s.

****

n.s.

< 0.000; < 0.001; < 0.01; < 0.05; n.s.: not significative.