As expected, we find highly significant latitudinal gradients in both the GIANT and R15-sibs data.
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The sentences
Interestingly, we find a weakly significant relationship between longitude and polygenic score in the UKB-Eur dataset (though not in the other UKB datasets), suggesting there may be systematic differences between the results based on British-only and pan-European samples, even when state of the art corrections for population structure are applied.