Table 3.

Mean ancestry proportions and standard deviations, estimated using STRUCTURE program, for each region of the Costa Rican population and for the whole population.

Region	EUROPEAN	AMERINDIAN	AFRICAN
Atlantic	0.519 (0.070)	0.355 (0.076)	0.126 (0.037)
Central	0.552 (0.087)	0.318 (0.083)	0.131 (0.036)
Central-South	0.556 (0.069)	0.319 (0.071)	0.125 (0.028)
North	0.536 (0.099)	0.329 (0.076)	0.135 (0.046)
North Pacific	0.463 (0.156)	0.340 (0.093)	0.197 (0.078)
South Pacific	0.453 (0.144)	0.374 (0.085)	0.172 (0.101)
Total	0.541 (0.097)	0.322 (0.084)	0.137 (0.055)