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Table 6 Results from the psychometric analyses of part II of the COS-CRC

From: Consequences of screening in colorectal cancer (COS-CRC): development and dimensionality of a questionnaire

COS-CRC Part II: item order in the questionnaire Subscales and misfit Observed Expected Gamma sd Probability of fit to the Rasch modela Item difficulty Single or ‘poor’ item
1. Broader aspects of life Existential values after deletion of item 11 0.815 0.833 0.033 0.57423 − 0.50  
1. Broader aspects of life Existential values with item 11 split for age 0.820 0.844 0.030 0.41669 − 0.43  
1. Broader aspects of life Existential values super item 10 and 11 0.820 0.827 0.033 0.81774 − 0.51  
2. Enjoyment of life Existential values after deletion of item 11 0.827 0.816 0.038 0.77772 0.15  
2. Enjoyment of life Existential values with item 11 split for age 0.827 0.833 0.034 0.87726 0.21  
2. Enjoyment of life Existential values with super item 10 and 11 0.827 0.812 0.037 0.68256 0.07  
3. Relaxed Relaxed/calm 0.728 0.736 0.050 0.87581 0.05  
4. Ability to listen to other people’s problems Empathy 0.949 0.933 0.023 0.24502 0.26  
5. Understand other people’s problems Empathy 0.964 0.937 0.021 0.20138 − 0.37  
6. Family relationships Social relations 0.972 0.976 0.011 0.69000 − 1.60  
7. Friend relationships Social relations 0.980 0.977 0.012 0.77011 0.58  
8. Other people relationships Social relations 0.978 0.967 0.016 0.51007 1.02  
9. Calm Relaxed/calm 0.758 0.729 0.053 0.59002 0.91  
10. Thoughts about future Existential values after deletion of item 11 0.741 0.813 0.040 0.07193 0.27  
10. Thoughts about future Existential values with item 11 split for age 0.821 0.833 0.036 0.73595 0.34  
10. Thoughts about future Existential values with super item 10 plus 11 0.821 0.872 0.030 0.08849 0.45  
11. Well-being Existential values, misfit 0.828 0.829 0.038 0.98421 0.52 ‘Poor item’
11. Well-being Existential values with split for age 0.828 0.815 0.040 0.74393 Age =  < 61: 14.02
Age = 61–65: − 0.32
Age = 66–70: 14.02
Age =  > 70: 0.70
 
11. Well-being Existential values with super item 10 plus 11 0.828 0.874 0.031 0.13929 0.06  
12. Awareness of life Existential values with deletion of item 11 0.855 0.818 0.038 0.32697 0.23  
12. Awareness of life Existential values, with item 11 split for age 0.854 0.833 0.034 0.53923 0.29  
12. Awareness of life Existential values with super item 10 and 11 0.854 0.813 0.037 0.26599 0.14  
13. Value life Existential values after deletion of item 11 0.868 0.827 0.035 0.24845 − 0.16  
13. Value life Existential values with item 11 split for age 0.862 0.839 0.032 0.48078 − 0.09  
13. Value life Existential values with super item 10 and 11 0.862 0.821 0.034 0.23802 − 0.21  
14. Energy Impulsivity 0.864 0.907 0.030 0.14298 0.31  
15. Feel responsible for my family Empathy 0.854 0.913 0.025 0.02108 0.11  
16. Lived life to the full Impulsivity 0.900 0.912 0.030 0.68793 − 0.45  
17. Relieved Relaxed/calm 0.726 0.753 0.047 0.56101 − 0.96  
18. Being impulsive Impulsivity 0.913 0.909 0.032 0.91435 0.70  
19. Desire to venture into something new Impulsivity 0.930 0.906 0.030 0.43608 − 0.26  
20. Courage to venture into something risky Impulsivity 0.940 0.914 0.031 0.40994 − 0.17  
21. Done things that overstepped my bounds Impulsivity 0.927 0.916 0.031 0.70756 − 0.13  
  1. aBenjamini-Hochberg rejects all p-values < 0.0016 to control the FDR at 0.05 and < 0.0003 to control the FDR at 0.01
  2. * < 5% false discovery rate (FDR), ** < 1% FDR