Effect of Month of Birth on Mean Birth Length in Austrian Newborns Born Between 1984 and 2021

IF 1.6 4区医学 Q1 ANTHROPOLOGY

American Journal of Human Biology Pub Date : 2024-08-10 DOI:10.1002/ajhb.24146

T. Waldhoer, S. Kirchengast, L. Yang

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引用次数: 0

Abstract

Objective

The length of newborns shows seasonal fluctuations, but the patterns of these fluctuations vary greatly. This study analyses the fluctuation in birth length by birth month and temporal changes in Austrian newborns from the 1984 to 2021 birth cohorts.

Methods

A total of 2 317 927 singleton-term births between 1984 and 2021 in Austria were included in this retrospective population-based cohort study. A strict inclusion criterion was the Austrian citizenship of the mother. The effect of month of birth (MOB) on birth length was estimated using a multivariable linear model adjusting for maternal educational level, newborn sex, gestational age, year of birth (YOB) of the newborn, and parity of the mother.

Results

Newborn length varied by MOB, but there was also a temporal trend. In the birth cohorts up to 2004, the longest newborns were born in February, while from 2008 onward, the longest birth lengths were observed in the summer months.

Conclusion

In this Austrian population-based sample, birth length shows nonrandom fluctuations by birth month. These patterns, however, varied considerably over time.

Abstract Image

查看原文本刊更多论文

出生月份对 1984 至 2021 年间奥地利新生儿平均出生身长的影响。

目的：新生儿的身长会出现季节性波动，但这些波动的模式差异很大。本研究分析了奥地利 1984 年至 2021 年出生队列中各出生月份新生儿身长的波动和时间变化：这项基于人口的回顾性队列研究共纳入了 2 317 927 名 1984 年至 2021 年期间在奥地利出生的单胎足月新生儿。母亲的奥地利国籍是一项严格的纳入标准。采用多变量线性模型估算了出生月份（MOB）对出生时长的影响，并对母亲的教育水平、新生儿性别、胎龄、新生儿出生年份（YOB）和母亲的奇偶数进行了调整：新生儿身长因出生年份而异，但也有时间趋势。在 2004 年之前的出生组群中，身长最长的新生儿出生在 2 月份，而从 2008 年开始，身长最长的新生儿出生在夏季：结论：在这个以奥地利人口为基础的样本中，出生长度在出生月份中呈现出非随机波动。结论：在这个以奥地利人口为基础的样本中，出生长度在不同出生月份呈现出非随机波动，但这些模式随时间变化很大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

American Journal of Human Biology 生物-生物学

CiteScore

4.80

自引率

13.80%

发文量

124

审稿时长

4-8 weeks

期刊介绍： The American Journal of Human Biology is the Official Journal of the Human Biology Association. The American Journal of Human Biology is a bimonthly, peer-reviewed, internationally circulated journal that publishes reports of original research, theoretical articles and timely reviews, and brief communications in the interdisciplinary field of human biology. As the official journal of the Human Biology Association, the Journal also publishes abstracts of research presented at its annual scientific meeting and book reviews relevant to the field. The Journal seeks scholarly manuscripts that address all aspects of human biology, health, and disease, particularly those that stress comparative, developmental, ecological, or evolutionary perspectives. The transdisciplinary areas covered in the Journal include, but are not limited to, epidemiology, genetic variation, population biology and demography, physiology, anatomy, nutrition, growth and aging, physical performance, physical activity and fitness, ecology, and evolution, along with their interactions. The Journal publishes basic, applied, and methodologically oriented research from all areas, including measurement, analytical techniques and strategies, and computer applications in human biology. Like many other biologically oriented disciplines, the field of human biology has undergone considerable growth and diversification in recent years, and the expansion of the aims and scope of the Journal is a reflection of this growth and membership diversification. The Journal is committed to prompt review, and priority publication is given to manuscripts with novel or timely findings, and to manuscripts of unusual interest.