DNA from PGRN-AMPS SSRI trial patients was genotyped at the RIKEN Center
for Genomic Medicine (Yokohama, Japan) using Illumina human 610-Quad BeadChips
(Illumina, San Diego, CA, USA), as described previously.11 (link), 37 (link) GWAS were performed using approximately 7.5 million
SNPs. Patients were removed from the analysis for non-compliance or
non-Caucasian heritage. Baseline analyses were adjusted for age and sex.
Metabolite concentrations and changes in metabolite concentrations after SSRI
treatment were tested for association with QIDS-C16 percent change, response and
remission. See Supplementary Text for details.