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Birth order and number of siblings and their association with overweight and obesity: a systematic review and meta-analysis.
- Source :
-
Nutrition Reviews . Feb2018, Vol. 76 Issue 2, p117-124. 8p. 1 Diagram, 3 Charts. - Publication Year :
- 2018
-
Abstract
- Context: The effect of both birth order and number of siblings on overweight and/or obesity has not been determined. Birth order and sibsize have been mathematically coupled to overweight and/or obesity, but thus far their respective effects have been estimated separately. Objective: The aim of this systematic review was to evaluate the effects of both birth order and number of siblings on the risk of overweight/obesity. Data Sources: The electronic databases MEDLINE, Social Science, SocINDEX, PsycINFO, CINAHL Plus, and Academic Search Complete were searched systematically. Study Selection: Titles and abstracts of 1698 records were examined. After 1504 records were excluded, 2 authors independently assessed the full text of all remaining papers (n=194); disagreements were resolved by discussion. Data Extraction: A standardized form for assessment of study quality and evidence synthesis was used to extract data from the included studies. Results: Twenty studies were included in the systematic review, 14 of which were included in the meta-analysis. Meta-analyses showed that lower (vs higher) birth order and smaller (vs greater) number of siblings were associated with overweight and/or obesity, with ORs of 1.47 (95%CI, 1.12-1.93) and 1.46 (95%CI, 1.17-1.84), respectively. However, among the 9 studies that attempted to separate the effects of birth order and number of siblings in the same analysis, a higher risk of overweight/obesity was consistently found among individuals without siblings than among those with 1 or more siblings, rather than among firstborns more generally. Conclusion: The results show that both lower birth order and lower number of siblings are associated with risk of overweight/obesity, which suggests that only children are at a slightly increased risk of overweight/obesity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *OBESITY risk factors
*BIRTH order
*SIBLINGS
*CINAHL database
*CONFIDENCE intervals
*EXPERIMENTAL design
*PSYCHOLOGY information storage & retrieval systems
*RESEARCH methodology
*MEDLINE
*META-analysis
*REGRESSION analysis
*SYSTEMATIC reviews
*EVIDENCE-based medicine
*PROFESSIONAL practice
*DATA analysis software
*DESCRIPTIVE statistics
*ODDS ratio
*EVALUATION
Subjects
Details
- Language :
- English
- ISSN :
- 00296643
- Volume :
- 76
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Nutrition Reviews
- Publication Type :
- Academic Journal
- Accession number :
- 127416647
- Full Text :
- https://doi.org/10.1093/nutrit/nux060