Rp. Tang et al., THE ASSOCIATION BETWEEN PERIOPERATIVE BLOOD-TRANSFUSION AND SURVIVAL OF PATIENTS WITH COLORECTAL-CANCER, Cancer, 72(2), 1993, pp. 341-348
Background. The authors undertook this study to test the hypothesis th
at perioperative blood transfusion has an adverse effect on survival o
f patients with colorectal cancer. Methods. A retrospective analysis w
as performed on 725 patients who underwent curative resection for Duke
s Stage B and C colorectal cancers in our institution between 1981-198
5 and who were followed for 5-11 years. Results. Rectal cancers occurr
ed more frequently in the transfused than in the nontransfused patient
s (64% versus 47%; P = 0.0001). In the patients with colon cancer, no
significant effect of transfusion on recurrence-free survival was seen
(P = 0.8, log-rank; P = 0.49, Cox regression analysis). The cumulativ
e 5-year survival rate was 77% (95% confidence interval, 69-85%) for t
he nontransfused and 78% (72-83%) for the transfused patients. In pati
ents with rectal cancer, the 5-year survival rate was 79% (67-87%) for
the nontransfused and 67% (59-71%) for the transfused patients. A sig
nificant association was noted in patients with Stage B cancer (P = 0.
002, log-rank; P = 0.02, Cox regression analysis), but not in those wi
th Stage C cancer (P = 0.05, log-rank; P = 0.15, Cox regression analys
is). In patients with Stage B rectal cancer, more frequent abdominoper
ineal resections (APR) were performed among the transfused patients (6
5% versus 32%; P = 0.0001). This subgroup was further stratified by op
erative procedure and reanalyzed using the same Cox regression model.
Transfusion had no effect on survival of patients treated by APR (P =
0.31) or of those having a sphincter-saving procedure (P = 0.53). Conc
lusion. The seemingly adverse effect of perioperative blood transfusio
n on the survival of patients with colorectal cancer may be explained
by other covariates.