“…In order to inform the choice of variables for inclusion in our study, a literature review was performed. This review indicated that common variables showing an association with pain assessment completion and/or severity of pain include age of patient, [18][19][20][21][22][23][24] sex of patient, [25][26][27][28][29] diagnosis of the patient, 20,30,31 time of day of call, 20,21 transport duration, 20,21 scene time, 21 and measures of cognitive functioning such as GCS score. 16,32…”