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Table 1 Results of the item analysis and the item-total correlation analysis of the German Capability for Suicide Questionnaire

From: Validation of the German capability for suicide questionnaire (GCSQ) in a high-risk sample of suicidal inpatients

Item number M SD Range Skewness Kurtosis Item difficulty Corrected item-total correlation
1 2.976 1.511 1-5 0.029 −1.444 59.52 0.525
2 2.887 1.554 1-5 0.183 −1.513 57.74 0.606
3 3.415 1.470 1-5 −0.387 −1.312 68.30 0.826
4 3.412 1.473 1-5 −0.391 −1.294 68.24 0.825
5 3.461 1.495 1-5 −0.425 −1.298 69.22 0.715
6 3.993 1.248 1-5 −1.145 0.240 79.86
7 3.399 1.132 1-5 −0.435 −0.901 67.98 0.413
8 3.276 1.398 1-5 −0.245 −1.241 65.52 0.367
9 3.584 1.249 1-5 −0.530 −0.789 71.68 0.695
10 3.646 1.341 1-5 −0.613 −0.857 72.92 0.590
11 3.835 1.207 1-5 −0.946 −0.047 76.70 0.388
  1. Note: Corrected item-total correlations for items 1-5 were calculated for the GCSQ-FAD factor, and for items 7-11 for the GCSQ-PT factor