There was no significant difference in OS ( @-year OS @ % -LSB- GCP -RSB- vs @ % -LSB- control -RSB- ; hazard ratio @ ; @-sided P = @ -RSB- ) , disease-free survival ( hazard ratio @ , @ % confidence interval @-@ @ , P = @ ) , and distant metastases-free survival ( hazard ratio @ , @ % confidence interval @-@ @ , P = @ ) between the @ arms .