1.
Impact and Outcomes of Postoperative Anaemia in Colorectal Cancer Patients: A Systematic Review
Moncur A, Chowdhary M, Chu Y, Francis N
Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland. 2020
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Editor's Choice
Abstract
OBJECTIVES Preoperative anaemia is common in colorectal cancer patients. Little attention has been given to the prevalence and consequences of postoperative anaemia. The aim of this study was to systematically review the published literature and determine the knowledge of prevalence and impact of postoperative anaemia in colorectal cancer patients. METHODS Databases, CINAHL and Medline, via EBSCO Host, were systematically searched to identify suitable articles published between 2004-2020. After an initial search, articles were screened and all eligible articles reported on prevalence of postoperative anaemia, clinical and long-term outcomes data in colorectal cancer patients undergoing surgery were included. The Risk of Bias 2.0 tool for the assessment of Randomised Controlled Trials and Risk of Bias in Non-randomised studies 1.0 tool were used for the assessment of bias in the studies selected in our review. RESULTS Six studies, one randomised control trial and five cohort studies were included with a total population size of 1714. The prevalence of anaemia at discharge of 76.6% was reported as the primary endpoint in only one study. The rate of Red Blood Cell Transfusion and length of hospital stay were found to be significantly increased in anaemic patients, while postoperative infection rate results were variable. Quality of life scores and overall survival at 5 years were significantly affected among anaemic patients as reported in two papers. CONCLUSION The available limited evidence on postoperative anaemia indicates its high prevalence with negative impact on clinical and long-term outcomes. Further research is required to standardise the measurement and address the true impact of correcting postoperative anaemia on functional and oncological outcomes.
PICO Summary
Population
Colorectal cancer patients undergoing surgery (6 studies, n= 1,714).
Intervention
Systematic review to determine the prevalence and consequences of postoperative anaemia.
Comparison
Outcome
The prevalence of anaemia at discharge of 76.6% was reported as the primary endpoint in only one study. The rate of red blood cell transfusion and length of hospital stay were found to be significantly increased in anaemic patients, while postoperative infection rate results were variable. Quality of life scores and overall survival at 5 years were significantly affected among anaemic patients as reported in two papers.
2.
The response to iron supplementation of pregnant women with the haemoglobin genotype AA or AS
Menendez C, Todd J, Alonso PL, Francis N, Lulat S, Ceesay S, Ascaso C, Smith T, M'Boge B, Greenwood BM
Transactions of the Royal Society of Tropical Medicine & Hygiene. 1995;89((3):):289-92.
Abstract
The influence of haemoglobin genotype on the response to iron supplementation was studied in a randomized, double blind, placebo-controlled trial involving 497 multigravid pregnant women from a rural area of The Gambia. Women were randomly allocated to receive either oral iron (60mg elemental iron per day) or placebo. At 36 weeks of pregnancy, women who had received oral iron during pregnancy had higher mean haemoglobin, packed cell volume, plasma iron and ferritin levels than did women who received placebo. Iron supplementation of pregnant women with the AA haemoglobin genotype also resulted in increases in the packed cell volume (PCV) and haemoglobin level measured after delivery, and in the birth weight of the infant. However, in AS women PCV and haemoglobin level at delivery were lower in the supplemented group and supplementation was also associated with reduced birth weights. In malaria endemic areas, pregnant women with the haemoglobin genotype AS may not benefit from iron supplementation during pregnancy.
3.
The effects of iron supplementation during pregnancy, given by traditional birth attendants, on the prevalence of anaemia and malaria
Menendez C, Todd J, Alonso PL, Francis N, Lulat S, Ceesay S, M'Boge B, Greenwood BM
Transactions of the Royal Society of Tropical Medicine & Hygiene. 1994;88((5):):590-3.
Abstract
A randomized, double-blind, placebo-controlled community-based trial of oral iron supplementation (200 mg ferrous sulphate daily) administered to multigravid pregnant women by traditional birth attendants (TBAs) was carried out in a rural area of The Gambia. Iron supplementation led to a significant reduction in the prevalence of anaemia and of iron deficiency. Iron supplementation was not accompanied by increased susceptibility to malaria infection; there was no difference in the prevalence and severity of peripheral blood or placental malaria infection between the 2 groups of women. The birth weight of children born to women who received iron prophylaxis was increased by an average of 56 g. It is concluded that oral iron prophylaxis can be successfully delivered through TBAs integrated into a primary health care programme. This simple intervention can produce significant beneficial effects on the health of the mother without inducing increased susceptibility to malaria and has the potential for reducing perinatal mortality by increasing birth weight.