B) Radical radiotherapy
Geographical quintile of radiotherapy		Adjusted for age and sex		Adjusted for age and sex and restricted to Stage III and Stage NA patients
		HR	95% CI	HR	95% CI
1	Lowest	1.00		1.00
2		0.98	0.97 to 1.00	0.97	0.95 to 1.00
3		0.97	0.95 to 0.99	0.94	0.91 to 0.97
4		0.93	0.91 to 0.95	0.92	0.89 to 0.94
5	Highest	0.94	0.92 to 0.95	0.88	0.85 to 0.90
χ2(one df)		80.7		97.4
P for trend		<0.001		<0.001