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Revisiting the relationships of 2D:4D with androgen receptor ( AR ) gene and current testosterone levels: Replication study and meta‐analyses
Author(s) -
zhang Kejin,
Yang Xing,
zhang Mengfei,
Wang Chunlan,
Fang Pengpeng,
Xue Mengying,
Zhao Jing,
Gao Xiaocai,
Pan Ruliang,
Gong Pingyuan
Publication year - 2020
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/jnr.24502
Subject(s) - testosterone (patch) , androgen receptor , digit ratio , replication (statistics) , medicine , endocrinology , saliva , biology , androgen , gene , current (fluid) , psychology , genetics , hormone , physics , prostate cancer , virology , cancer , thermodynamics
The relationships of digit ratio (2D:4D) with the length of AR (CAG)n, and testosterone levels from saliva and blood have been extensively debated over the years. This research including three studies further clarifies such controversies. To do so, we re‐examined the relationships between the length of AR (CAG)n, 2D:4D, and current testosterone levels, through replication study and meta‐analysis for each study. The results indicate: (a) the length of AR (CAG)n is not significantly associated with 2D:4D; (b) current testosterone levels are not significantly associated with the ratio; and (c) the length is not significantly associated with testosterone levels. Thus, AR (CAG)n and current testosterone levels are not significantly related to 2D:4D at individual level.