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Digit ratio (2D:4D) and fractional exhaled nitric oxide (FeNO) | Synapse
March 3, 2026
Digit ratio (2D:4D) and fractional exhaled nitric oxide (FeNO)
BS
Barbara Slawski
JM
John T. Manning
BA
Bogusław Antoszewski
Medical University of Lodz
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Key Points
Higher digit ratio correlates with elevated levels of fractional exhaled nitric oxide, indicating a possible biomarker relationship.
Average FeNO levels were significantly different across various digit ratios measured in 150 individuals.
Measurements evaluated include digit ratio (2D:4D) and FeNO testing in an observational analysis setting.
Further research is needed to determine the clinical significance and underlying mechanisms of this relationship.
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Cite This Study
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Slawski et al. (Thu,) studied this question.
synapsesocial.com/papers/69a75d72c6e9836116a27826
https://doi.org/https://doi.org/10.1016/j.earlhumdev.2026.106496