I obtained approval from NCBI to access data from dbGaP Study Accession: phs000424 [Genotype-Tissue Expression (GTEx]. I only need certain RNA-seq datasets from only a select number of tissues from within a specific age range. Figuring out tissue type and sex is simple enough, but obtaining variable information for the samples, variables such as age, race, ethnicity, height, weight, BMI, etc, which is supposedly available, has been a complete mystery to me, even after spending many hours looking for it. Can someone please point me in the direction of this information? NCBI's links for dbGaP tutorials are dead since they are use Flash and Flash is now obsolete. Many thanks.
Metadata like that would likely require an eRA commons account and an application to access controlled data at dbGaP.