. Author manuscript; available in PMC: 2015 Jun 1.

Published in final edited form as: Brain Imaging Behav. 2014 Jun;8(2):143–152. doi: 10.1007/s11682-013-9277-5

Table 1.

Pair–wise relationships within Mexican-American pedigrees of participants in the San Antonio Family Studies (top) and the number of GOBS subjects by decade that participated in the current study.

Number of Relative Pairs	Familial Relationship
2	Monozygotic Twins
1004	Parent-offspring
1192	Siblings
352	Grandparent-grandchild
2407	Avuncular
175	Half-siblings
7	Great grandparent-grandchild
675	Grand-avuncular
361	Half-avuncular
2783	1^st cousins
34	Great grand-avuncular
19	Half grand-avuncular
2797	1^st cousins, once removed
402	Half 1^st cousins
343	1^st cousins, twice removed
10	Half 1^st cousins, once removed
955	2^na cousins
321	2^nd cousins, once removed

Age Range	Number of subjects
< 20	55
20 – 29	174
30 – 39	232
40 – 49	221
50 – 59	178
60 – 69	111
70 – 79	34
≥ 80	5