Shorter versus longer durations of any human milk feeding and childhood leukemia a systematic review
BACKGROUND: 1. This systematic review was conducted as part of the U.S. Department of Agriculture and Department of Health and Human Services Pregnancy and Birth to 24 Months Project.2. The goal of this systematic review was to examine the following question: What is the relationship between shorter...
| Main Author: | |
|---|---|
| Corporate Authors: | , |
| Format: | eBook |
| Language: | English |
| Published: |
Washington, D.C.
United States Department of Agriculture
April 2019, 2019
|
| Online Access: | |
| Collection: | National Center for Biotechnology Information - Collection details see MPG.ReNa |
| Summary: | BACKGROUND: 1. This systematic review was conducted as part of the U.S. Department of Agriculture and Department of Health and Human Services Pregnancy and Birth to 24 Months Project.2. The goal of this systematic review was to examine the following question: What is the relationship between shorter versus longer durations of any human milk feeding and childhood leukemia?3. This systematic review examines comparisons of infants who were fed human milk for shorter durations with infants who were fed human milk for longer durations. Human milk feeding was defined as feeding human milk alone or in combination with infant formula and/or complementary foods or beverages such as cow's milk. Human milk was defined as mother's own milk provided at the breast (i.e., nursing) or expressed and fed fresh or after refrigeration or freezing. Donor milk (e.g., banked milk) was not examined in this review.4. Articles were screened independently by 2 NESR analysts to determine which articles met predetermined criteria for inclusion.4. Data from each included article were extracted, risks of bias were assessed, and both were checked for accuracy.5. The body of evidence was qualitatively synthesized, a conclusion statement was developed, and the strength of the evidence (grade) was assessed using pre-established criteria including evaluation of the internal validity/risk of bias, adequacy, consistency, impact, and generalizability of available evidence. SUMMARY OF EVIDENCE: 1. Eight articles met the inclusion criteria for this systematic review, which presented evidence from 8 case-control studies.2. The notable feature of this body of evidence was its consistency in the direction of the associations across most of the studies. Childhood leukemia includes acute childhood leukemia, generally, as well as acute lymphoblastic leukemia, specifically. CONCLUSION STATEMENT AND GRADE: 1. Limited but consistent evidence suggests that, among infants fed some amount of human milk, a shorter versus longer duration of any human milk feeding is associated with a slightly higher risk of childhood leukemia. Grade: Limited METHODS: 1. The systematic review was conducted by a team of staff from the Nutrition Evidence Systematic Review in collaboration with a Technical Expert Collaborative.2. A single literature search was conducted to identify literature for several related systematic reviews that examined infant milk-feeding practices and different outcomes. The search was conducted in CINAHL, Cochrane, Embase, and PubMed, and used a search date range of January 1980 to March 2016. A manual search was done to identify articles that may not have been included in the electronic databases searched.3. Two of the 8 studies reported statistically significant associations that suggested that shorter versus longer durations of any human milk feeding are associated with higher risk of childhood leukemia. Further, the majority of nonsignificant associations, some of which had wide confidence intervals indicative of suboptimal statistical power, were consistent in direction with the significant associations.3. The ability to draw stronger conclusions was primarily limited by the small number of studies, insufficient sample sizes, and the retrospective collection of exposure data, which increases the risk of misclassification of the exposure |
|---|---|
| Physical Description: | 1 PDF file (200 pages) illustrations |