Table 4. Staining of p53 in primary biopsies in relation to radiation response.

	p53 negative	p53 positive	No. of patients	P a
pCRb	60 (71%)	25 (29%)	85 (100%)
non-pCRc	11 (46%)	13 (55%)	24 (100%)	0.031
Total	71	38	109

^aP=statistical significance using χ² test.

^bpCR=pathological complete remission.

^cnon-pCR=incomplete pathological remission.