German Beck Scale for Suicide Ideation (BSS): psychometric properties from a representative population survey

BMC Psychiatry

Table 3 Item properties for the entire BSS and total scores in the risk group

Item	M	SD	P _i	%	r _it
1 Wish to live	0.68	0.71	34	53.6	.59
2 Wish to die	0.67	0.69	33	54.5	.61
3 Reasons for living or dying	0.59	0.67	29	49.1	.61
4 Active suicide attempt	0.53	0.64	26	44.6	.61
5 Passive suicide attempt	1.18	0.51	59	94.6	.37
6 Duration of suicidal thoughts	0.26	0.55	13	20.5	.55
7 Frequency of ideation	0.21	0.45	11	18.8	.62
8 Attitude toward ideation	0.67	0.66	33	56.3	.59
9 Control over suicidal action	0.23	0.46	11	21.4	.66
10 Deterrents to attempt	0.73	0.83	37	49.1	.47
11 Reasons for attempt	1.28	0.80	64	78.6	.19
12 Specificity of planning	0.30	0.58	15	24.1	.44
13 Availability or opportunity	0.37	0.67	18	25.9	.49
14 Capability to carry out attempt	0.54	0.63	27	46.4	.61
15 Expectancy of actual attempt	0.28	0.51	14	25.0	.72
16 Extent of actual preparation	0.15	0.45	7	11.6	.63
17 Suicide note	0.16	0.44	8	14.3	.58
18 Final acts	0.16	0.44	8	13.4	.43
19 Deception and concealment	0.84	0.75	42	62.5	.20
Total score	3.64	2.54	36	–	–
Number of endorsed items^a	2.96	1.58	–	–	–

Note. ^aItem was regarded as endorsed if the statement rated 1 or 2 was chosen. P _i = item difficulty; r _it = item-rest correlation

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