Table 2.

Determination of the agreement between two biological matrices expressed as Kappa Cohen index

Biological matrices	Kappa index	CI95% KAPPA		agreement
Bile-faeces	0.61	0.41	0.81	good
Bile-liver	0.66	0.42	0.89	good
Bile-muscle	0.13	0.02	0.23	poor
Bile-blood	0.24	-0.04	0.52	low
Faeces-muscle	0.16	0.05	0.27	poor
Faeces-blood	0.26	0.02	0.50	low
Liver-muscle	0.08	-0.01	0.17	No agreement
Liver-blood	0.54	0.18	0.90	mild
Liver-faeces	0.58	0.36	0.80	mild
Blood-muscle	0.04	-0.02	0.09	No agreement
Bile-IgG	0.12	-0.03	0.27	poor
Faeces-IgG	0.23	0.07	0.40	low
Liver-IgG	0.17	0.03	0.31	poor
Blood-IgG	0.05	-0.04	0.15	No agreement

Above 0.60 the agreement is considered good (i.e. bile/faeces or bile/liver), between 0.40 and 0.60 is considered mild (i.e. liver/blood), between 0.20- 0.39 is considered low (i.e. bile/blood, faeces/blood), between 0.19–10 is considered poor agreement and < 0.1 there is no agreement