---
title: "WashU2 GWAS"
id: "8591"
type: "sample_set"
slug: "snd10130"
published_at: "2026-06-18T17:27:29+00:00"
modified_at: "2026-06-18T17:27:29+00:00"
url: "https://dss.niagads.org/sample-sets/snd10130/"
markdown_url: "https://dss.niagads.org/sample-sets/snd10130.md"
excerpt: "The WashU2 sample set was genotyped at the Children’s Hospital of Philadelphia using the Illumina Infinium OmniExpress BeadChip which captures genotype data on 730,525 genomic SNPs. The standard Alzheimer’s Disease Genetics Consortium (ADGC) quality control pipeline (Naj et al. 2011)..."
---

## Description

The WashU2 sample set was genotyped at the Children’s Hospital of Philadelphia using the Illumina Infinium OmniExpress BeadChip which captures genotype data on 730,525 genomic SNPs. The standard Alzheimer’s Disease Genetics Consortium (ADGC) quality control pipeline ([Naj et al. 2011](https://pubmed.ncbi.nlm.nih.gov/21460841/)
) was applied to this GWAS dataset.

## Cohorts

- [Knight Alzheimer’s Disease Research Center (KGAD)](https://dss.niagads.org/cohorts/knight-alzheimers-disease-research-center-kgad/)

## Sex

### Total number of samples: 235

Female6628.1 %

Male6628.1 %

Sex not reported: 103

## Race

### Total number of samples: 235

| White | 132 |
| --- | --- |
| NA | 103 |

## Ethnicity

### Total number of samples: 235

Not Hispanic or Latino

132

56.2%

Not Applicable/Not Available

103

43.8%

## Diagnosis

### Total number of samples: 235

| AD |  |  |
| --- | --- | --- |
| Control | 94 | 40.0% |
| Case | 38 | 16.2% |
| Unknown | 103 | 43.8% |

## APOE

### Total number of samples: 235

- 2312 (5.1%)
- 243 (1.3%)
- 3373 (31.1%)
- 3436 (15.3%)
- 447 (3.0%)
- NA104 (44.3%)