Median overall survival was not significantly different in the chemotherapy group than in the sequential chemoimmunotherapy group ( @ months -LSB- @ % CI @-@ -RSB- vs @ months -LSB- @-@ -RSB- ; hazard ratio -LSB- HR -RSB- @ , @ % CI @-@ , p = @ ) , or in the concurrent chemoimmunotherapy group ( @ months -LSB- @ % CI @-@ -RSB- , HR @ , @ % CI @-@ , p = @ ; overall log-rank of ( @ ) @df = @ ; p = @ ) .