Winje Eirin, Willoughby Kate, Lask Bryan
Regional Department for Eating Disorders, Psychiatric Division, Ullevål University Hospital, Oslo, Norway.
Int J Eat Disord. 2008 Sep;41(6):479-90. doi: 10.1002/eat.20540.
A season of birth (SoB) bias is said to be present if the SoB pattern for a particular group varies from the pattern within the normal population. Significant biases have been found for several disorders including eating disorders (EDs). This article critically reviews the existing literature on SoB in ED in order to inform future hypothesis-based research.
A literature search identified 12 papers investigating SoB in ED.
Despite methodological differences, the studies consistently show a SoB bias for anorexia nervosa (AN) in the spring months, in both the northern and southern Hemispheres. This is especially strong for early-onset and restrictive subtype of AN.
These findings suggest that SoB is a risk factor for AN. However, none of the studies have been methodologically satisfactory. Future research needs to overcome numerous methodological challenges and to explore specific hypotheses to explain this bias.
如果特定群体的出生季节（SoB）模式与正常人群中的模式不同，则称存在出生季节偏差。已发现包括饮食失调（EDs）在内的几种疾病存在显著偏差。本文对现有关于饮食失调中出生季节的文献进行了批判性综述，以便为未来基于假设的研究提供信息。
文献检索确定了12篇研究饮食失调中出生季节的论文。
尽管方法存在差异，但这些研究一致表明，在北半球和南半球，春季几个月神经性厌食症（AN）存在出生季节偏差。对于早发性和限制性亚型的神经性厌食症，这种偏差尤为明显。
这些发现表明出生季节是神经性厌食症的一个风险因素。然而，这些研究在方法上都不尽如人意。未来的研究需要克服众多方法上的挑战，并探索具体假设来解释这种偏差。
