TABLE 2

Cox Proportional Hazards Models for Predicting Risk Factors of OS in Stage IA NSCLC

Multivariate analysis
Univariate analysisModel 1Model 2, SUVmaxModel 3, TLG
VariableHRPHRPHRPHRP
Age (1-y increase)1.095 (1.038–1.156)0.0011.085 (1.024–1.151)0.0061.083 (1.022–1.147)0.0071.078 (1.018–1.144)0.010
The female sex (vs. male)0.294 (0.098–0.881)0.0290.561 (0.170–1.852)0.3420.597 (0.183–1.952)0.3930.636 (0.194–2.093)0.457
Tumor size (1-cm increase)2.128 (0.976–4.642)0.0581.538 (0.329–7.181)0.5841.201 (0.253–5.703)0.818
Adenocarcinoma (vs. nonadenocarcinoma)0.243 (0.098–0.599)0.0020.370 (0.139–0.985)0.0470.508 (0.187–1.381)0.1840.377 (0.141–1.005)0.051
T1b (vs. T1a)2.338 (0.929–5.882)0.0711.008 (0.157–6.470)0.9930.995 (0.156–6.328)0.9960.948 (0.335–2.687)0.921
SUVmax (high vs. low)5.763 (1.678–19.794)0.0053.520 (0.930–13.329)0.064
TLG (high vs. low)4.681 (1.796–12.200)0.0023.159 (1.057–9.444)0.040
MTV1.050 (0.981–1.123)0.1631.002 (0.922–1.089)0.964
Concordance index0.663 (0.525–0.801)0.668 (0.528–0.807)0.676 (0.541–0.812)
  • Data in parentheses are 95% confidence intervals.