Items consisting of plastic or the semi-synthetic fibre rayon were found in 37 % of the analysed fish (on average 1.9 items/fish).
Moreover, differences in the content of the cognitive process comprehension/frame of reference was primarily found in the items consisting of two target constructs, i.e., 'trouble' taking a 'short walk' (item 1) and 'interference' in 'social activities' (item 5).
Additional file 1 contains the final instrument of 34 items consisting of 8 subscale domains determined by the original work.
Therefore the final scoring algorithm for the 12 items consisted of 1) the Global score (items 1 4 and 9 11), 2) the Pain score (items 5 8), 3) Total Score (items 1 11) and 4) Item 12 about whether the patient would ask their doctor for the medication.
The 10 items consist of statements relating to the following depressive symptoms: inability to experience pleasure, self-blame, anxiety, fear or panic, inability to cope, difficulty sleeping, sadness, tearfulness and self-harm ideas [ 38].
The immediate post-test (27 items) and delayed post-test (24 items) consist of questions on recognizing the word in a multiple choice question, recalling the translation of the word, and guessing which word fits in different contexts.
Most of the items consist of two questions linked to another.
