RT Journal Article SR Electronic T1 How familiar are clinician teammates in the emergency department? JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 258 OP 262 DO 10.1136/emermed-2013-203199 VO 32 IS 4 A1 P Daniel Patterson A1 Anthony J Pfeiffer A1 Judith R Lave A1 Matthew D Weaver A1 Kaleab Abebe A1 David Krackhardt A1 Robert M Arnold A1 Donald M Yealy YR 2015 UL http://emj.bmj.com/content/32/4/258.abstract AB Objectives Lack of familiarity between teammates is linked to worsened safety in high risk settings. The emergency department (ED) is a high risk healthcare setting where unfamiliar teams are created by diversity in clinician shift schedules and flexibility in clinician movement across the department. We sought to characterise familiarity between clinician teammates in one urban teaching hospital ED over a 22 week study period. Methods We used a retrospective study design of shift scheduling data to calculate the mean weekly hours of familiarity between teammates at the dyadic level, and the proportion of clinicians with a minimum of 2, 5, 10 and 20 h of familiarity at any given hour during the study period. Results Mean weekly hours of familiarity between ED clinician dyads was 2 h (SD 1.5). At any given hour over the study period, the proportions of clinicians with a minimum of 2, 5, 10 and 20 h of familiarity were 80%, 51%, 27% and 0.8%, respectively. Conclusions In our study, few clinicians could be described as having a high level of familiarity with teammates. The limited familiarity between ED clinicians identified in this study may be a natural feature of ED care delivery in academic settings. We provide a template for measurement of ED team familiarity.