Table 3. The different survival results in the different tumor CD28 and lymphocyte CD28 expression groups.

	Tumor CD28			Lymphocyte CD28
	Low expression	High expression	P value	Low expression	High expression	P value
3-year OS	85.7%	86.5%	0.695	87.1%	85.3%	0.779
3-year FFS	76.4%	73.7%	0.752	75.5%	73.8%	0.849
3-year D-FFS	82.8%	76.9%	0.505	78.6%	77.9%	0.812
3-year LR-FFS	91.7%	94.8%	0.409	94.3%	93.2%	0.777

Abbreviations: OS, overall survival; FFS, failure free survival; D-FFS, distant failure-free survival; LR-FFS, localregional failure-free survival.