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Model 3 estimates and interaction between Height and Waist. Values of Height and Waist were centred: for Height, mean ± SD = 163.83 ± 9.85; for Waist circumference, mean ± SD = 78.01 ± 10.59. (a) Estimates and 95% CI for each model term. For categorical predictors, women and Bogota were used as reference levels. For model terms, WC(c) = Waist circumference (centred); H(c) = Height (centred); S = Sample. (b) Interaction between Height and Waist. As waist reference, −1 SD (67.43 cm), mean (78.01 cm), and +1 SD (88.6 cm) values were used, showed on a blue to red colour scale. (c) Johnson-Neyman plot, showing for which values of Waist (centred), the slope of Height (centred) is significant as a predictor of Self-reported health; these slopes are predicted to be significant for centred Waists circumferences below −4.51 (73.51 cm), or above 68.73 (146.74 cm; not shown as it is a prediction for extreme values, beyond the ones found in any of our samples).

Model 3 estimates and interaction between Height and Waist. Values of Height and Waist were centred: for Height, mean ± SD = 163.83 ± 9.85; for Waist circumference, mean ± SD = 78.01 ± 10.59. (a) Estimates and 95% CI for each model term. For categorical predictors, women and Bogota were used as reference levels. For model terms, WC(c) = Waist circumference (centred); H(c) = Height (centred); S = Sample. (b) Interaction between Height and Waist. As waist reference, −1 SD (67.43 cm), mean (78.01 cm), and +1 SD (88.6 cm) values were used, showed on a blue to red colour scale. (c) Johnson-Neyman plot, showing for which values of Waist (centred), the slope of Height (centred) is significant as a predictor of Self-reported health; these slopes are predicted to be significant for centred Waists circumferences below −4.51 (73.51 cm), or above 68.73 (146.74 cm; not shown as it is a prediction for extreme values, beyond the ones found in any of our samples).

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Body height is a life-history component. It involves important costs for its expression and maintenance, which may originate trade-offs on other costly components such as reproduction or immunity. Although previous evidence has supported the idea that human height could be a sexually selected trait, the explanatory mechanisms that underlie this sel...

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