Table 3.

Survival status of patients in relation to results of doppler flowmetry

Status	Doppler positive	Doppler negative
Died with recurrence	16	0
Died without recurrence	4	6
Alive without recurrence	18	16
Alive with LNR	3	0
Total	41	22
Risk of death with recurrence	0.39	0
Risk difference	0.39; 95%C.I. 0.24 to 0.53	Fisher’s 2 tailed p = 0.0005

LNR regional lymph node recurrence