Extended Data Fig. 4: Reanalysis of data from DelPrete (2019). | Nature Ecology & Evolution

Extended Data Fig. 4: Reanalysis of data from DelPrete (2019).

From: Sex differences in the pelvis did not evolve de novo in modern humans

Extended Data Fig. 4

These data comprise means for females and males of 26 pelvic variables (linear distances, curved distances, and circumferences) from 6 populations (skeletal collections): White individuals from Hamann-Todd collection (HTW, 60 males, 59 females); Black individuals from Hamann-Todd (HTB, 60 m., 60 f.); Whites from Terry collection (TEW, 52 m., 52 f.), Blacks from Terry collection (TEB, 52 m., 52 f.); Coimbra collection (CO, 84 m., 71 f.); Spitalfields collection (SP, 31 m., 35 f.). We conducted a principal component analysis of these data. Shown are the sex means of males (blue) and females (red) for each population within the first three principal components (accounting for 94% of the total variance). The sex difference vectors (lines connecting the sex means) of the six populations are close to parallel in the first three principal components (panels A and B), illustrating the similar pattern of sex differences in the pelvis between human populations, despite some variation in magnitude (panel C). The magnitude was calculated as the Euclidean length of the sex differences vector.

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