Table 3.

Multivariate Cox Stepwise Proportional Hazard Model for overall survival in patients by sub-variable of various histologic types

Histology	χ 2	P	Hazard ratio (95% CI)
Well differentiated	9.148	0.027
Moderately differentiated	5.527	0.019	0.174 (0.04, 0.748)
Poorly differentiated	4.346	0.037	0.590 (0.36, 0.969)
Mucinous cell	2.428	0.119	0.689 (0.432, 1.101)
Signet ring cell	3.645	0.056	0.504 (0.250, 1.018)