Table 3.

Factors associated with adjuvant chemotherapy: multivariate analysis

Factor	OR	95% CI	p Value*
Stage at diagnosis
Stage I	1
Stage II	9.84	3.0–32.30
Stage III	70.30	21.5–230.0	<0.0001
Period of diagnosis
1976–1989	1
1990–1993	7.09	3.64–13.80
1994–1998	39.90	22.0–72.40	<0.0001
Age (y)
≥75	1
<75	10.80	6.34–18.30	<0.0001

Logistic regression carried out among 2359 patients who underwent a curative resection of the tumour, excluding cases with unknown chemotherapy treatment, undetermined resection, no resection or palliative surgery, advanced, or unknown stages.

*p for heterogeneity (likelihood ratio test).

OR, odds ratio; 95% CI, 95% confidence interval.