Table IV.

Univariate analysis of the factors contributing to recurrence.

Variables	Odds ratio	95% confidence interval	p-value
Gender: male	1.322	0.581–3.008	0.506
Age: <68 years	2.630	1.151–6.007	0.022
Smoking history: former + current	1.582	0.673–3.717	0.292
T status: 1b–4	3.056	1.174–7.955	0.022
N status: positive	9.952	4.025–24.609	<0.001
Tumor grade: G2–3	6.149	2.171–17.415	<0.001
IGF1R expression: positive	2.976	1.277–6.934	0.012