The Chinese version of the Myocardial Infarction Dimensional Assessment Scale (MIDAS): Mokken scaling

Table 1 Mokken scaling of Chinese Mandarin version of the MIDAS (n = 180)

Item	Mean	H	Label
20	1.63	0.39	Felt anxious about dying?
23*	1.71	0.44	Felt down or depressed?
25	1.76	0.47	Felt stressed?
18*	1.81	0.46	Felt insecure?
17*	1.88	0.47	Felt vulnerable?
6	2.23	0.52	Been breathless?
7	2.25	0.57	Had chest pain or tightness when undertaking physical activity?
8	2.26	0.56	Felt frustrated at your limitations?
2	2.34	0.48	Had angina symptoms?
11*	2.36	0.53	Felt you cannot perform your domestic duties?
1	2.47	0.57	Thought twice before you undertook physical activity?
9*	2.49	0.54	Needed to rest more?
5*	2.62	0.63	Had no energy?
3*	2.72	0.55	Had angina that affected your life?
4*	2.78	0.60	Felt slowed down?

H = 0.52; Rho = 0.94; p = 0.00012; H^T = 0.26; Mean = 33.3 (SD = 12.53); Skewness = 0.21; Kurtosis = -0.95; * = items retained in [3]

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