“…Two studies, one comparing the FLACC to the CPOT and Nonverbal Pain Scale (see below) 54 , and the other comparing the FLACC to the CPOT 46 inexplicably omitted data on the FLACC and focused almost exclusively on the CPOT, thus adding little to knowledge about the FLACC. Although Buttes et al 46 noted that the two study data collectors thought the CPOT was more appropriate for adults than the FLACC, they did not present an explanation to support this statement. With minimal empirical data on the reliability, validity, and clinical utility of the FLACC pain tool in adult populations, particularly those in palliative care, it is unclear whether the FLACC is suitable for assessing pain in palliative care adults across settings and further study is warranted.…”