Table 1 Demographics of study participants

From: Large-scale genome-wide analyses of stuttering

 

Cases (Yes)

Controls (No)

23andMe

  

Total

99,776

1,023,243

Males

48,217

392,414

Females

51,559

630,829

Add Health

  

Total

812

8,569

Males

469

3,951

Females

343

4,618

International Stuttering Project

  

Total

957

6,450

Males

699

4,572

Females

258

1,878

  1. 23andMe case status was determined using the survey question, ‘Have you ever had a stammer or stutter?’ Cases represent individuals who answered ‘yes’ to this question; controls represent individuals who answered ‘no’. Add Health case status was determined by the survey question, ‘Do you have a problem with stuttering or stammering?’ Cases represent individuals who at any point answered ‘yes’ to this question; controls always answered ‘no’. Case status in the ISP cohort was determined by speech–language pathologists with expertise in stuttering and fluency disorders.
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