STUDY OBJECTIVE: The NEXUS chest decision instrument identifies a very-low-risk population of @entity1 with @entity130 for whom chest imaging can be avoided. However, it requires that all 7 National Emergency X-Ray Utilization Study (NEXUS) chest criteria be absent. To inform @entity1 and physician shared decisionmaking about imaging, we describe the test characteristics of individual criteria of the NEXUS chest decision instrument and provide the prevalence of injuries when 1, 2, or 3 of the 7 criteria are present. METHODS: We conducted this secondary analysis of 2 prospectively collected cohorts of @entity1 with @entity130 who were older than 14 years and enrolled in NEXUS chest studies between December 2009 and January 2012. Physicians at 9 US Level I @entity130 centers recorded the presence or absence of the 7 NEXUS chest criteria. We calculated test characteristics of each criterion and combinations of criteria for the outcome measures of major clinical injuries and @entity764 observed on chest imaging. RESULTS: We enrolled 21,382 @entity1 , of whom 992 (4.6%) had major clinical injuries and 3,135 (14.7%) had thoracic injuries observed on chest imaging. Sensitivities of individual test characteristics ranged from 15% to 56% for major clinical injury and 14% to 53% for @entity764 observed on chest imaging, with specificities varying from 71% to 84%  for major clinical injury  and 67% to 84% for @entity764 observed on chest imaging. Individual criteria were associated with a prevalence of major clinical injury between 1.9% and 3.8% and of @entity764 observed on chest imaging between 5.3% and 11.5%. CONCLUSION: @entity1 with isolated NEXUS chest criteria have low rates of major clinical injury. The risk of major clinical injury for @entity1 with 2 or 3 factors range from 1.7% to 16.6%, depending on the combination of criteria. Criteria-specific risks could be used to inform shared decisionmaking about the need for imaging by @entity1 and their physicians.

Prevalence of XXXX With the Presence of NEXUS Chest  Criteria: Data to Inform Shared Decisionmaking About  Imaging Use.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients', 'patient'] @entity764 :: ('MESH:D013898', 'Disease') :: ['thoracic injury'] @entity130 :: ('MESH:D014947', 'Disease') :: ['blunt trauma', 'trauma']
@entity764 :: (MESH:D013898,Disease) :: ['Chest Injury']
