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Table 4 For those who changed from unable to express a treatment choice to able, one way ANOVA of change in scores on McCAT-T and MacCAT-FP (T2 − T1)

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

Means (standard deviation) No change in ability to express a treatment choice Change in ability to express a treatment choice Effect size ANOVA
Mean SD Mean SD Cohen’s d 95 % confidence interval F P
N = 30 N = 7   Lower Upper
MacCAT-T difference T2 − T1
 Understanding difference 0.6 1.4 2.4 1.7 1.16 0.29 2.02 7.7 0.009
 Reasoning difference 1.3 3.4 2.7 2.2 0.49 −0.34 1.32 1.0 0.32
 Appreciation difference 0.5 1.3 1.1 1.2 0.48 −0.36 1.29 1.2 0.27
 Total difference 2.5 4.8 6.2 3.6 0.87 0.03 1.72 3.5 0.68
MacCAT- FP difference T2 − T1
 Understanding difference 0.87 3.7 4.9 4.9 0.93 0.08 1.78 5.8 0.022
 Reasoning difference 0.6 3.0 3.8 3.9 0.92 0.07 1.77 5.8 0.021
 Appreciation difference 0.27 3.1 5.4 5.3 1.18 0.32 2.05 11.5 0.002
 Total difference 1.7 8.7 14.1 12.4 1.16 0.29 2.02 9.8 0.003
  1. Note that 7 who had been unable to express a choice became capable
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