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Table 3 For those who changed from unfit to plead to fit as judged by their treating psychiatrist, one way ANOVA of change in measures of functional capacity between Time 1 and Time 2

From: Functional mental capacity, treatment as usual and time: magnitude of change in secure hospital patients with major mental illness

Mean (standard deviation)

No change in clinicians’ assessment of fitness to plead, n = 31

Change in clinicians’ assessment of fitness to plead, n = 6

Effect size

ANOVA

Mean

SD

mean

SD

Cohen’s d

95 % confidence interval

F

P

N = 31

N = 6

Lower

Upper

MacCAT-T difference T2 − T1

 Understanding difference

0.61

1.3

2.7

1.7

1.38

0.45

2.31

10.8

0.002

 Reasoning difference

1.62

3.1

1.5

4.0

0.03

−0.84

0.91

0.0

0.930

 Appreciation difference

0.64

1.3

0.75

1.4

0.08

−0.79

0.96

0.0

0.857

 Total difference

2.9

4.4

4.9

6.4

0.36

−0.51

1.24

0.9

0.344

MacCAT-FP difference T2 − T1

 Understanding difference

0.83

3.6

5.7

4.9

1.13

0.22

2.04

7.9

0.008

 Reasoning difference

0.58

3.1

4.5

3.4

1.20

0.29

2.12

7.9

0.008

 Appreciation difference

0.42

3.5

5.50

5.0

1.17

0.26

2.09

9.4

0.004

 Total difference

1.80

8.8

15.7

12.1

1.31

0.39

2.24

11.1

0.002

  1. Note that six who had been unfit became fit by T2