Table 4. Comparison between adjuvant therapies for the risk of recurrence and death.

Relapse	Death
	Observation (n=21, 38%)	EBRT (n=43, 44%)	Chemotherapy (n=23, 39%)	Sequential chemo-EBRT (n=4, 10%)
Observation (n=17, 31%)	Observation total (n=55)	1.3 (0.64-2.49)	1.0 (0.49-2.20)	0.2 (0.05-0.55)*
EBRT (n=32, 33%)	1.1 (0.53-2.21)	EBRT total (n=98)	0.8 (0.42-1.58)	0.1 (0.04-0.41)†
Chemotherapy (n=22, 37%)	1.3 (0.61-2.89)	1.2 (0.62-2.41)	Chemotherapy total (n=59)	0.2 (0.05-0.52)‡
Sequential chemo-EBRT (n=7, 17%)	0.4 ( 0.17-1.21)	0.4 (0.17-1.03)§	0.3 (0.13-0.89)∥	Sequential chemo-EBRT total (n=42)

Values are presented as odds ratio (95% confidence interval).

EBRT, external beam radiotherapy

^*p=0.003; ^†p<0.001; ^‡p=0.002; ^§p=0.058; ^∥p=0.027.