Table 4 Cronbach’s alpha values, composite reliability and mean empowerment scores

Cronbach’s alpha values

Knowledge and understanding

0.730

0.721

0.759

0.728

Personal control

0.693

0.633

0.636

0.751

Identity

0.680

0.682

0.751

0.636

Shared decision-making

0.774

0.833

0.804

0.491

Enabling others

0.863

0.872

0.905

0.782

Overall scale

0.873

0.878

0.871

0.854

Composite reliability

Knowledge and understanding

0.753

0.752

0.779

0.732

Personal control

0.702

0.650

0.677

0.753

Identity

0.684

0.682

0.770

0.657

Shared decision-making

0.559

0.835

0.805

0.470

Enabling others

0.864

0.876

0.910

0.782

Overall scale

0.929

0.942

0.951

0.917

Mean patient empowerment scores

Knowledge and understanding

12.94 (1.90)

13.07 (1.94)

12.93 (2.03)

12.61 (1.68)

Personal control

12.04 (2.10)

12.36 (1.97)

12.59 (1.85)

10.90 (2.12)

Identity

11.66 (2.39)

11.82 (2.42)

11.19 (2.79)

11.58 (1.97)

Shared decision-making

12.15 (2.26)

12.55 (2.22)

11.58 (2.75)

11.61 (1.74)

Enabling others

10.57 (2.83)

10.72 (2.90)

10.51 (3.12)

10.25 (2.40)

Overall scale

59.37 (8.47)

60.52 (8.53)

58.86 (9.07)

56.98 (7.33)