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Table 3 Sensitivity analyses for robust estimation of the causal association between blood pressure and midlife cognitive function before removing outliers

From: Association of blood pressure with cognitive function at midlife: a Mendelian randomization study

 

DSST

RAVLT

Stroop

SBP

DBP

PP

SBP

DBP

PP

SBP

DBP

PP

Weighted Median

Estimate (SD)

−0.32 (0.23)

− 0.58 (0.40)

− 0.30 (0.42)

− 0.05 (0.05)

−0.06 (0.08)

0.08 (0.09)

0.19 (0.13)

0.26 (0.24)

0.08 (0.24)

P-value

0.154

0.15

0.462

0.341

0.484

0.352

0.146

0.269

0.731

MR Egger Regression

Estimate (SD)

−0.53 (0.33)

− 0.82 (0.54)

0.19 (0.40)

0.05 (0.07)

−0.12 (0.12)

0.01 (0.09)

0.09 (0.18)

−0.12 (0.30)

−0.21 (0.23)

P-value

0.106

0.133

0.788

0.487

0.318

0.91

0.922

0.702

0.731

ConMix

Estimate

−0.38

−0.54

−0.44

− 0.03

−0.05

− 0.01

0.17

0.28

0.18

95% CI

(−0.71, − 0.07)

(−1.03, − 0.04)

(−0.93, 0.01)

(− 0.08, 0.04)

(− 0.15, 0.07)

(−0.12, 0.08)

(0.00, 0.33)

(−0.04, 0.56)

(− 0.07, 0.45)

I2 statistic

P-value

0.97

0.97

0.96

0.97

0.97

0.96

0.97

0.97

0.96

MRPRESSO

P-value

0.83

0.49

0.61

0.06

0.09

0.11

0.51

0.49

0.36

Cochran Statistic

Q Statistics

85.93

126.23

91.71

119.19

116.26

113.72

97.76

97.69

101.15

P-value

0.803

0.648

0.633

0.072

0.089

0.118

0.488

0.461

0.366

Egger Intercept Test

Estimate (SD)

0.02 (0.14)

0.05 (0.14)

−0.22 (0.11)

−0.05 (0.03)

0.02 (0.03)

−0.03 (0.03)

0.06 (0.08)

0.09 (0.08)

0.13 (0.06)

P-value

0.874

0.74

0.055

0.15

0.453

0.236

0.426

0.259

0.045

  1. Abbreviations: MR Mendelian randomization, SBP Systolic Blood Pressure, DBP Diastolic Blood Pressure, PP Pulse Pressure, DSST Digit Symbol Substitution Test, RAVLT Rey Auditory Verbal Learning Test, Stroop The Stroop Interference test, MRPRESSO Mendelian Randomization Pleiotropy RESidual Sum and Outlier, conMIX Contamination mixture, SD Standard deviation, CI Confidence Interval