Table 2 Characteristics of instrumental variables used in the Mendelian randomization analyses in East Asian ancestry.

From: Association between type 2 diabetes and amyotrophic lateral sclerosis

Exposure

Published genome-wide association study of the T2D etc

Present Mendelian randomization analysis

References

Maximum sample size

No. of independent genome-wide significant SNPs

No. of SNPs included in the analysis

Proxies used (r2 > 0.9)

Excluded (no proxy at r2 > 0.9)

T2D

Li et al.16

32,974

10

8

 

2

Glucose

Hwang et al.17

24,740

14

14

  

Glycated hemoglobin

Chen et al.18

~30,000

12

11

 

1

BMI

Wen et al.19

27,715

13

12

 

1

WCadjBMI

Wen et al.20

16,378

4

4

  
  1. SNPs single nucleotide polymorphisms, T2D type 2 diabetes, BMI body mass index.