VDR and temporal arteritis: Considering VDR rs1989969 C>T mutant alleles in the control group, ORs, GCA samples and control samples, the power of our analysis (α= 0.05) was 0.999 in 330 GCA cases and 608 controls with an OR of 2.05 in age<60 subgroup, and 0.983 with an OR of 1.78 in the drinking subgroup (PS, version 3.0, 2009, available at http://biostat.mc.vanderbilt.edu/twiki/bin/view/Main/PowerSampleSize).