“…We identified two types of tools used to assess for problematic opioid use in palliative care: questionnaires ( n = 32, 76%) 53–55,57,58,61–63,65,66,68–89 and urine drug tests ( n = 21, 50%), 17,53,55,56,57,59,60,63,64,67,68,70,71,81,82,85,89–93 with an overlap of both types in 11 studies (26%). 53,55,57,63,68,70,71,81,82,85,89 Two studies did not specify which questionnaire they used.…”