SALT
1 2 3 4
MZ 19,3% 15,0% 0,1% 65,6%
DZ SS 30,0% 12,1% 0,1% 57,7%
DZ OS 25,3% 0,0% 0,0% 74,7%
STAGE
1 2 3 4
MZ 13,0% 86,9% 0,1% 0,0%
DZ SS 3,8% 96,1% 0,0% 0,0%
DZ OS 0,0% 99,5% 0,0% 0,5%
Table S1: Zygosity confirmation from the 10,464 complete twin pairs from SALT and STAGE used in the concordance and heritability studies based on DNA (1), on algorhythms with asnwers from both twins (2), with answers from one twin (3), or based on registry data from 1960’s and 1970’s (4).