thus , patients with thoracic aortic rupture are not more likely to have rib fractures ( 7/21 versus 14/21 ; p = 0.15 ) , and if a rib fracture is present , the probability of it being at the upper level is the same as that for a fracture at any other level ( 1/7 versus 6/7 ; p = 0.06 ) .
C0035522
rib fracture
C0016658
fracture