.6-16.0) and 17.4 h (11.3-26.5), respectively). After controlling for confounding factors, rapid time to analgesia (not AR) was associated with shorter ED-LOS of discharged and admitted patients (p<0.001 and<0.05, respectively). When adjusting for confounding variables, ED-LOS is shortened by 2 h (95% CI 1.1 to 2.8) when delay to receive analgesic is<90 min compared with>90 min for discharged and by 2.3 h (95% CI 0.17 to 4.4) for admitted patients.