8/31/2023 0 Comments 2d 4d ratio pubmed![]() The constancy of the 2D:4D ratio for the White homosexuals did not appear to extend to homosexuals of three other ethnicities, and there were also subpopulation differences related to right or left hands. It was the 2D:4D values for the heterosexual participants that varied most, particularly between the USA and the British studies, and these were responsible for many of the discrepancies in the conclusions across studies. In common with adults, the 2D:4D ratio of children shows sex and ethnic differences with low values found in a Black group. Methods: Nineteen studies were included in the qualitative analysis. One interesting result to emerge from the reanalysis was that the 2D:4D ratios for the homosexual groups were relatively similar across studies. 29581795 PMCID: PMC5822871 DOI: 10.1155/2018/7698193 Abstract Objective: This systematic review and meta-analysis aimed to evaluate the association of 2D : 4D with cancer diagnosis, malignancy, and age at presentation. Differences in variability within different groups were minor. Age differences did not account for the discrepancies. Because ethnicity is known to affect the 2D:4D ratio, the reanalysis focused on participants who identified themselves as White or Caucasian, the ethnic group that was most numerous in all of the studies. The original data from all five studies were reanalyzed in a search for possible explanations of the discrepancies. Although differences have commonly been found between heterosexuals and homosexuals, the direction of the difference has not been consistent across studies. Five studies have examined the relationship between sexual orientation and the relative lengths of the 2nd and 4th fingers (the 2D:4D ratio). ![]()
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