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Table 3 Multivariate analysis of Cox and Weibull model with prognostic factors

From: Application of Weibull model for survival of patients with gastric cancer

Characteristics Cox(AIC = 4534.21) Weilbull(AIC = 1693.28)
  HR (CI: 95%) HR (CI: 95%)
Age 1.01 (0.98-1.03) 1.03* (1.01-1.06)
Past medical history   
   No 1 1
   Yes 1.17* (1.03-1.33) 1.22* (1.05-1.40)
Location of tumor   
   Lower third 1 1
   Middle third 0.93 (0.74-1.18) 0.99 (0.86-1.25)
   Upper third 1.47* (1.12-1.93) 1.35* (1.19-1.53)
   Whole stomach 1.45* (1.08-1.93) 1.47* (1.21-1.75)
eradicative degree of surgery   
   Utterly 1 1
   Relatively 1.03 (0.77-1.39) 1.79*(1.64-1.92)
   Palliative 2.16*(1.71-2.73) 4.07*(3.85-4.34)
Histologic grade   
   Well differentiated 1 1
   Moderately differentiated 1.12*(1.05-1.19) 1.14*(1.08-1.24)
   Poorly differentiated 1.25*(1.18-1.33) 1.34*(1.17-1.55)
Depth of invasion   
   T1 1 1
   T2 1.97*(1.53-2.54) 2.40*(2.10-2.53)
   T3 2.19* (1.68-2.86) 2.77* (2.53-2.96)
   T4 2.50*(1.82-3.44) 3.15*(3.20-3.99)
Stage   
   I 1 1
   II 0.97 (0.57-1.63) 1.15 (0.91-1.42)
   III 1.57 (0.97-2.56) 1.93* (1.66-2.25)
   IV 2.06* (1.21-3.51) 3.03* (2.76-3.80)
  1. *significant at the 5% level
  2. HR, hazard ratio; CI, confidence interval
  3. AIC, akaike information criterion