Table 1.

Mokken scaling of the Chinese Cardiac Depression Scale with items showing invariant item ordering (n = 438)

Item	Label	Mean	H
14	There is only misery in the future for me	2.52	0.40
13	The possibility of sudden death worries me	2.75	0.37
25	I feel frustrated	2.85	0.45
8	I am not the person I used to be	2.89	0.41
10	I feel like I'm living on borrowed time	2.97	0.35
6	I may not recover completely	3.13	0.37
23	I feel independent and in control of my life	3.15	0.30
19	I gain just as much pleasure from my leisure activities as I used to*	3.21	0.35
16	I get hardly anything done	3.32	0.37
4	I get pleasure from life at present*	3.43	0.38
12	I feel good in spirits*	3.52	0.35
9	I wake up in the early hours of the morning and cannot get back to sleep	3.67	0.32
3	I can't be bothered doing anything much	3.78	0.31
17	My problems are not over yet	3.79	0.35
20	My memory is as good as it always was*	3.85	0.32

H = 0.36; Rho = 0.88; p = 0.00026; H^T = 0.11; * reverse scored items