Table 5.

Results of the two-piecewise linear regression model in stage III elderly patients for CSS

	HR (95% CI), P valuea
Postoperative capecitabine duration	0.86 (0.78, 0.96), 0.0046
Inflection point of duration
< 16	0.79 (0.68, 0.92), 0.0027
≥ 16	1.34 (0.91, 1.97), 0.13
P for log likelihood ratio test	0.044

Notes: ^aAdjust for: gender, age, T stage, CA199, CEA, histological type, CCI, and MMR

Abbreviations: HR hazard ratio; CI confidence interval; CA carcinoma antigen; CEA carcinoembryonic antigen; MMR mismatch repair; CCI Charlson comorbidity index