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. Author manuscript; available in PMC: 2019 Jul 1.
Published in final edited form as: Exp Gerontol. 2017 Oct 26;107:148–160. doi: 10.1016/j.exger.2017.10.020

Table 1.1.

The sample sizes (by gender) and the number of SNPs in four datasets before and after quality control (QC) procedure.

By gender
Dataset Before QC
After QC
#Samples #Males #Females #SNPs #Samples #Males #Females #SNPs
CHS 5270 2252 3018 49,094 5018 2137 2881 33,328
FHS 3788 1651 2317 49,094 3651 1592 2059 35,259
HRS 9641 4120 5521 2,315,518 9631 4118 5513 1,329,158
LOADFS 4561 1666 2895 590,247 4561 1666 2895 551,330