Table 4.

Factors associated with progression-free survival (PFS) under chemotherapy.

Variables (N)	PFS Months	Univariate
		HR	95% CI	p Value
Well differentiated (3)	10 (6.8–13.2)	1
Moderately differentiated (29)	11 (8.4–13.6)	0.952	0.219–4.142	0.948
Well differentiated (3)	10 (6.8–13.2)	1
Poorly differentiated (26)	4 (2.5–5.5)	2.897	0.676–12.415	0.152
Moderately differentiated (29)	11 (8.4–13.6)	1
Poorly differentiated (26)	4 (2.5–5.5)	2.800	1.495–5.352	0.002 **

Data are presented as the median (95% CI). HR, hazard ratio. ** p < 0.01.