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Table 2 Main results of the MR analysis and sensitivity analysis

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

Outcome

N

 

MR analysis

 

Heterogeneity

MR-Egger pleiotropy

MR PRESSO

Directionality

SNVs

   

Test

Test

Test

Test

 

Method

Estimate (95% CI)

P

Q value

P

Egger intercept

P

Global Test P

Correct directionaliy

P

Type 1 diabetes (T1DM)

PD risk*

68

IVW

0.9708(0.9466, 0.9956)

0.0214

69.3901

0.3968

0.0002

0.9704

0.3885

TRUE

0

PD AAO

49

IVW

-0.0432(-0.2235, 0.1369)

0.6379

36.5035

0.8875

-0.0132

0.6908

0.8941

TRUE

0

UPDRS3

29

IVW

0.0081(-0.0347, 0.0508)

0.712

6.2855

1

0.0059

0.5376

1

TRUE

0.6823

MMSE

31

IVW

-0.0502(-0.1265, 0.0261)

0.1969

8.1621

1

0.0018

0.9106

1

TRUE

0.0654

MOCA

23

IVW

-0.0983(-0.3123, 0.1157)

0.3678

7.9993

0.9972

0.0037

0.9445

0.9951

TRUE

0.8692

Type 2 diabetes (T2DM)

PD risk

154

IVW

1.0292(0.9714, 1.0905)

0.3284

194.3979

0.0132

-0.0077

0.0921

0.0262

TRUE

0

PD AAO

119

IVW

0.0780(-0.2895, 0.4455)

0.6774

67.9223

0.9999

0.03

0.3063

1

TRUE

0

UPDRS3

49

IVW

-0.0796(-0.1834, 0.0243)

0.1331

7.9237

1

0.01

0.2797

1

FALSE

0.0017

MMSE

46

IVW

-0.0194(-0.2116, 0.1728)

0.8431

4.1319

1

0.004

0.8081

1

FALSE

0

MOCA

45

IVW

-0.0532(-0.6078, 0.5014)

0.8508

5.8716

1

0.0415

0.3616

1

FALSE

0.0003

  1. N SNPs: number of single nucleotide polymorphisms in the instrument. IVW: Inverse variance weighted. MR: Mendelian randomization. MR-PRESSO: Mendelian Randomization Pleiotropy RESidual Sum and Outlier. OR: Odds ratio. CI: confidence interval. Beta: MR effect estimate. Se: standard error of MR effect estimate. P: P-value. PD: Parkinson’s Disease; AAO: Age at onset of Parkinson’s disease; UPDRS3: Unified Parkinson’s Disease Rating Scale part III. MMSE: Mini-Mental State Examination. MoCA: Montreal Cognitive Assessment. Describing PD risk results using OR (95% CI) and UPDRS3/MMSE/MOCA results using Bete ± se