Table V.

Cox regression analysis of prognosis index of all the different of gene signatures.

PI in Type of radiosensitivity genes	Number of genes	HR	95% CI	P-value
Standard RSI	10	1.383	0.810–2.362	0.232
PI of RSI	10	2.218	1.307–3.764	0.003
31-gene signature	31	2.402	1.410–4.093	0.001
RSI+31-gene signature	41	2.967	1.717–5.127	9.71×10−5
Multivariate Cox screen	6	0.6380	0.380–1.070	0.089

PI, prognostic index; HR, hazard ratio; CI, confidence interval; RSI, radiodensity index.