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Table 2 Factor loadings

From: Irritable bowel syndrome-specific health-related quality of life instrument: development and psychometric evaluation

No. Abbreviated item Factor 1 Factor 2 Factor 3 Factor 4 h 2
1 Abdominal bloating 0.78 0.22 0.10 0.14 0.69
2 Tenesmus 0.74 0.21 –0.00 0.12 0.61
3 Changed stool form 0.68 0.16 0.37 0.12 0.65
4 Changed stool frequency 0.69 0.03 0.39 0.15 0.65
5 Flatulence 0.73 0.22 0.16 0.22 0.66
6 Depression 0.24 0.77 0.12 0.27 0.73
7 Irritation 0.34 0.69 0.25 0.27 0.73
8 Angry 0.09 0.81 0.18 0.14 0.71
9 Nervousness 0.26 0.77 0.20 0.26 0.76
10 Finding a toilet 0.20 0.32 0.77 0.25 0.70
11 Holding back defecation 0.20 0.10 0.89 0.18 0.75
12 Unpredictability 0.21 0.26 0.80 0.21 0.84
13 Eating before going out 0.24 0.22 0.46 0.63 0.74
14 Consideration of foods 0.20 0.23 0.15 0.80 0.80
15 Favorite foods 0.16 0.21 0.09 0.87 0.86
16 Eating out 0.15 0.28 0.35 0.72 0.79
  1. Bartlett’s sphericity: χ 2 = 2676.64, p < 0.001, KMO = 0.90
  2. Factor 1, bowel function; Factor 2, emotions; Factor 3, concerns about social activity; Factor 4, consideration of foods; h 2, communality of the measured variables
  3. Bold values: meaningful loadings
  4. Original full version: see additional file 1