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Table 3 Item difficulties and item-total correlations for RDF in the entire sample and in the group of IBS patients

From: Design and validation of a German version of the GSRS-IBS - an analysis of its psychometric quality and factorial structure

  IBS patients Entire sample
  Item difficulties Item-total correlations Item difficulties Item-total correlations
1. Stomach pain .62 .37 .36 .65
2. Relief through bowel movement .52 .50 .30 .75
3. Passing gas .71 .42 .41 .77
4. Stomach gas .72 .68 .40 .83
5. Constipation .41 .30 .25 .51
6. Diarrhoea or frequent bowel movement .48 .18 .30 .57
7. Liquid stool .41 .21 .73 .50
8. Hard stool .41 .30 .26 .48
9. Urge to empty bowel .59 .36 .37 .65
10. Feeling of complete emptying of the bowel .62 .56 .34 .75
11. Feeling of fullness after meals .55 .42 .31 .62
12. Prolonged feeling of fullness .58 .39 .33 .65
13. Bloated stomach .64 .51 .35 .77
  1. IBS irritable bowel syndrome, RDF Reizdarm-Fragebogen