RESULTS	A point-of-care test also reduced ED length of stay in patients discharged to home ( 256 versus 268 minutes ; median difference 12 minutes ; 95 % CI 2 to 22 minutes ) and with an Emergency Severity Index triage level of 3 ( 333 versus 355 minutes ; median difference 22 minutes ; 95 % CI 4 to 40 minutes ) .\