Table 4.

STRUCTURE results of relative mean ancestry proportions and standard deviations for each region of the Costa Rican population in relation to the African (AF) groups divided into five geographic areas. The European and Amerindian ancestry components are not shown. Data from African populations were obtained from a published database (Tishkoff et al., 2009).

Region	CENTRAL AF	EASTERN AF	SAHARAN AF	SOUTHERN AF	WESTERN AF
Atlantic	0.204 (0.016)	0.180 (0.008)	0.103 (0.008)	0.131 (0.006)	0.247 (0.016)
Central	0.224 (0.016)	0.172 (0.010)	0.110 (0.012)	0.118 (0.006)	0.272 (0.016)
Central-South	0.294 (0.013)	0.162 (0.007)	0.076 (0.006)	0.172 (0.005)	0.174 (0.012)
North	0.227 (0.025)	0.164 (0.009)	0.098 (0.007)	0.136 (0.005)	0.234 (0.019)
North Pacific	0.261 (0.020)	0.191 (0.024)	0.099 (0.012)	0.150 (0.004)	0.461 (0.047)
South Pacific	0.233 (0.019)	0.174 (0.016)	0.085 (0.008)	0.220 (0.012)	0.288 (0.062)
Total	0.223 (0.017)	0.175 (0.013)	0.108 (0.011)	0.121 (0.006)	0.299 (0.034)