Median overall survival was not significantly different in the chemotherapy group than in the sequential chemoimmunotherapy group ( 79 months [ 95 % CI 71-88 ] vs 69 months [ 64-76 ] ; hazard ratio [ HR ] 119 , 9825 % CI 097-148 , p = 005 ) , or in the concurrent chemoimmunotherapy group ( 84 months [ 95 % CI 73-97 ] , HR 105 , 9825 % CI 085-129 , p = 064 ; overall log-rank of ( 2 ) 2df = 43 ; p = 011 ) .