Table 1.

Classification of proposed weighted scores per item for the ECBI Intensity and Problem Scale based on the extended Rasch model (OPLM) outcomes

Weights	Intensity scale item	Problem scale item
1.	2, 36	2, 36
2.	1, 4, 6, 7, 16, 21, 25, 26, 27	1, 4, 16, 22, 33
3.	3, 5, 12, 15, 18, 20, 22, 23, 24, 32, 33	3, 5, 6, 7, 15, 18, 20, 21, 23, 24, 25, 27, 28, 29, 30, 32, 34, 35
4.	8, 9, 10, 11, 14, 17, 28, 29, 30, 31, 34, 35	9, 12, 13, 14, 17, 19, 26, 31
5.	13, 19	8, 10, 11

After dichotomization of the ECBI Intensity Scale into 0 and 1 and using these weights a maximum of 111 can be scored. For the ECBI Problem Scale a maximum of 113 can be scored