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Table 1 Details of the data sources used in this study

From: Causal relationship between diabetes mellitus, glycemic traits and Parkinson’s disease: a multivariable mendelian randomization analysis

Phenotype

Abre.

Traits

Source

Sample size

Total (cases/ controls)

Ancestry

Reference

Diabetes Phenotypes & Glycemic Traits

Type 1 diabetes

T1DM

Type 1 diabetes

NA

520,580 (18,942/501,638)

European

Chiou et al. [14]

Type 2 diabetes

T2DM

Type 2 diabetes

NA

933,970 (80,154/853,816)

European

Mahajan et al. [15]

Glycated hemoglobin levels

HbA1c

Glucose tolerance test

MAGIC

146,806

European

Chen et al. [17]

Fasting glucose

FG

Glucose tolerance test

MAGIC

200,622

European

Chen et al. [17]

Two-hour glucose

2hGlu

Glucose tolerance test

MAGIC

63,396

European

Chen et al. [17]

Insulin fold change during an oral glucose tolerance test (adjusted for BMI)

IFC

Insulin resistance

MAGIC

53,287

European

Williamson et al. [16]

Modified Stumvoll Insulin Sensitivity Index (adjusted for BMI)

ISI

Insulin resistance

MAGIC

53,657

European

Williamson et al. [16]

Fasting insulin

FI

Pancreatic β-cell dysfunction

MAGIC

151,013

European

Chen et al. [17]

Proinsulin

PROI

Pancreatic β-cell dysfunction

MAGIC

45,861

European

Broadaway et al. [18]

Parkinson’s disease phenotypes

Parkinson’s disease risk

PD risk

PD risk

IPDGC

482,730 (33,674/449,056)

European

Nalls et al. [20]

Age at onset of Parkinson’s disease

AAO

PD prodrome

IPDGC

28,568

European

Blauwendraat et al. [19]

UPDRS3

NA

PD progression

IPDGC

4093

European

Iwaki et al. [21]

MMSE

NA

PD progression

IPDGC

4093

European

Iwaki et al. [21]

MOCA

NA

PD progression

IPDGC

4093

European

Iwaki et al. [21]

Anti-diabetic drugs phenotypes

Drugs used in diabetes

NA

Antidiabetic drugs

UK Biobank

305,913 (15,272/290,641)

European

Wu et al. [23]

Diabetes, insulin treatment

NA

Anti-diabetic drugs

FinnGen

218,792 (29,071/189,721)

European

Kurki et al. [24]

Metformin

NA

Anti-diabetic drugs

FinnGen

462,933 (11,552/451,381)

European

Kurki et al. [24]

  1. MAGIC: Meta-Analyses of Glucose and Insulin-related Traits Consortium; IPDGC: International Parkinson’s Disease Genomics Consortium; UPDRS3, Unified Parkinson’s Disease Rating Scale part III; MMSE, Mini-Mental State Examination; MoCA, Montreal Cognitive Assessment