Data regarding 2D:4D and other digit ratios in Greek population

Second–to–fourth digit ratio (2D:4D) is a sexually dimorphic biometric marker, which is influenced by prenatal estrogen levels and reflects to the hormonal profile of each individual. Exposure to environmental estrogens was common in the past. Their endocrine–disrupting action, combined with their long half–time, may have a feminizing effect and an impact on health. A stratified sample of 160 Greek people was selected by random procedures and fingers’ length was measured by means of an electronic caliper. Based on preliminary statistical analysis, middle aged persons, corresponding to birth in the period 1947–1972, were found to differ significantly from the rest and the original sample was subsequently divided into three age subgroups (≤37, 38–63 and ≥ 64 years old). 2D:4D ratio was found significantly higher in Greek people aged from 38 to 63 years old, although sexual dimorphism remained unaffected. The other digit ratios followed the same pattern, with people aged less than 38 years to share equivalent ratios with people aged more than 63 years. Raw data chaperone the publication " Exposure to environmental estrogens and second–to–fourth digit ratio in Greek population: A possible link " with DOI: https://doi.org/10.1016/j.earlhumdev.2020.105245 That combines datasets from: [1] " Digit ratios and relation to myocardial infarction in Greek men and women " with DOI: https://doi.org/10.1016/j.genm.2010.11.008 , [2] " Epidemiologic study of the sexually dimorphic second to fourth digit ratio (2D:4D) and other finger ratios in Greek population " with PMID: 19149213 , [3] " 2D: 4D Ratio Is Higher in Older People in Greece. May This be Attributed to Environmental Influence? " with DOI: https://doi.org/10.1002/pds.1631 , [4] " RELATION OF WAIST-TO-HIP RATIO TO BODY-MASS-INDEX IN A SAMPLE OF YOUNG GREEK PEOPLE with DOI: https://doi.org/10.1111/j.1742-7843.2009.00437.x .

食指-无名指长度比（Second–to–fourth digit ratio, 2D:4D）是一类具有性别二态性的生物特征标记，其受产前雌激素水平调控，并可反映个体的激素暴露特征。过往环境雌激素暴露现象较为普遍，这类物质兼具内分泌干扰作用与较长的生物半衰期，可能产生雌性化效应并对健康造成影响。
本研究采用随机抽样方法选取160名希腊人群作为分层抽样样本，通过电子游标卡尺测量手指长度。经初步统计分析发现，1947-1972年出生的中年人群与其余样本存在显著差异，因此原始样本被进一步划分为三个年龄亚组：≤37岁、38-63岁及≥64岁。
研究结果显示，38-63岁的希腊人群的2D:4D比值显著升高，尽管其性别二态性并未发生改变。其余手指长度比值亦呈现相同的变化模式，其中≤37岁人群与≥64岁人群的比值水平相近。
本研究的原始数据随论文《Exposure to environmental estrogens and second–to–fourth digit ratio in Greek population: A possible link》（DOI: https://doi.org/10.1016/j.earlhumdev.2020.105245）一同公开，该研究整合了以下4项数据集：
[1] 《Digit ratios and relation to myocardial infarction in Greek men and women》（DOI: https://doi.org/10.1016/j.genm.2010.11.008）
[2] 《Epidemiologic study of the sexually dimorphic second to fourth digit ratio (2D:4D) and other finger ratios in Greek population》（PMID: 19149213）
[3] 《2D: 4D Ratio Is Higher in Older People in Greece. May This be Attributed to Environmental Influence?》（DOI: https://doi.org/10.1002/pds.1631）
[4] 《RELATION OF WAIST-TO-HIP RATIO TO BODY-MASS-INDEX IN A SAMPLE OF YOUNG GREEK PEOPLE》（DOI: https://doi.org/10.1111/j.1742-7843.2009.00437.x）