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Table 3 Evaluation of psychometric properties of the SOC total scale and its three sub-dimensions (N = 142)

From: Rasch analysis of the sense of coherence scale in a sample of people with morbid obesity – a cross-sectional study

   SOC Total scale SOC Sub-dimensions
Step   Original (13 items) Reduced (12 items) Meaningfulness (4 items) Comprehensibility (5 items) Manageability (4 items)
2 Item misfit #1 None None None None
3 Variance explained      
   1st dimension % 39.0% 39.1% 58.4% 43.4% 52.3%
   2nd dimension % 10.0% 10.5% 15.8% 18.3% 20.0%
4 Person misfit, n (%) 10 (7.0) 11 (7.7) 8 (5.6) 9 (6.3) 7 (4.9)
   Maximum score, n (%) None None None None None
   Minimum score, n (%) None None None None None
5 Person-separation index (without extremes) 2.05 2.01 1.71 1.30 1.46
6 Cronbach’s alpha 0.81 0.80 0.74 0.63 0.74