Skip to main content

Table 4 Overall MR analyses with strong genetic instruments (p < 5E−08) for causal effects of peripheral blood hematological traits and count data of immune-related cells on five types of ADs

From: A systematic two-sample and bidirectional MR process highlights a unidirectional genetic causal effect of allergic diseases on COVID-19 infection/severity

Exposure

Outcome

No. of clumped SNPsa

No. of SNPs in MRAb

MR p-valuec

MR methodd

Heterogeneity

Pleiotropy

Directionality

Immune-related cells

 CD4+ T

BAD

1

1

3.90E−04

Wald ratio

–

–

True

Asthma2020

1

1.73E−13

Wald ratio

–

–

True

PA

1

2.74E−04

Wald ratio

–

–

True

SA

1

2.85E−01

Wald ratio

–

–

True

 CD4+ T/CD8+ T

BAD

21

20

9.69E−01

IVW (random effects)

Yes

No

True

Asthma2020

16

2.42E−02

IVW (random effects)

Yes

No

True

ADE2015

5

4.70E−02

MR Egger

Yes

Yes

True

PA

16

1.46E−01

IVW (random effects)

Yes

No

True

SA

16

7.79E−01

IVW (random effects)

Yes

No

True

 CD56+ NK

BAD

1

1

5.49E−01

Wald ratio

–

–

True

Asthma2020

1

2.66E−01

Wald ratio

–

–

True

ADE2015

1

7.16E−01

Wald ratio

–

–

True

 CD8+ T

BAD

5

5

3.01E−01

IVW (random effects)

Yes

No

True

Asthma2020

3

7.31E−01

IVW(random effects)

Yes

No

True

PA

4

7.57E−01

IVW (fixed effects)

No

No

True

SA

4

5.44E−01

IVW (random effects)

Yes

No

True

Hematological traits

 HT

BAD

1

1

3.00E−01

Wald ratio

–

–

True

Asthma2020

1

3.58E−01

Wald ratio

–

–

True

ADE2015

1

3.83E−01

Wald ratio

–

–

True

 LYMPH

BAD

1

1

5.50E−01

Wald ratio

–

–

True

Asthma2020

1

5.23E−14

Wald ratio

–

–

True

 MCH

BAD

4

3

4.58E−01

IVW (random effects)

Yes

No

True

Asthma2020

3

4.02E−01

IVW (fixed effects)

No

No

True

ADE2015

3

4.74E−01

IVW (fixed effects)

No

No

True

PA

1

6.01E−01

Wald ratio

–

–

True

SA

1

7.82E−01

Wald ratio

–

–

True

 MCV

BAD

5

5

1.88E−01

IVW (fixed effects)

No

No

True

Asthma2020

4

2.00E−01

IVW (fixed effects)

No

No

True

ADE2015

5

3.63E−01

IVW (fixed effects)

No

No

True

PA

1

6.01E−01

Wald ratio

–

–

True

SA

1

7.82E−01

Wald ratio

–

–

True

 MONO

BAD

3

3

2.46E−03

IVW (fixed effects)

No

No

True

Asthma2020

3

3.23E−01

IVW (fixed effects)

No

No

True

ADE2015

3

8.52E−01

IVW (fixed effects)

No

No

True

 PLT

BAD

1

1

8.80E−01

Wald ratio

–

–

True

Asthma2020

1

4.11E−01

Wald ratio

–

–

True

ADE2015

1

4.90E−01

Wald ratio

–

–

True

 RBC

BAD

1

1

8.03E−01

Wald ratio

–

–

True

Asthma2020

1

5.24E−01

Wald ratio

–

–

True

ADE2015

1

9.20E−01

Wald ratio

–

–

True

  1. –: The corresponding analysis is not available
  2. aNo. of clumped SNPs: number of independent genetic SNPs with a p-value < 5 × 10–8 after clumping
  3. bNo. of SNPs in MRA: number of independent genetic SNPs used in the MR analysis for each pair of exposure and outcome
  4. cMR p-value: p-value of the most suitable MR method
  5. dThe most suitable MR analysis used in MR analysis. Bold values indicate that the MR p-value is less than 0.05