Table 5 Mendelian randomization IVW estimates for the effect of genetic liability to IBD, Crohn’s, and UC on autism and vice versa

From: Parental inflammatory bowel disease and autism in children

Exposure

Outcome

OR (95% CIs)

P

Genetic liability to IBD

Autism

1.02 (1.0, 1.05)

0.1

Genetic liability to UC

Autism

1.04 (1.01, 1.07)

0.006

Genetic liability to Crohn’s

Autism

1.01 (1.0, 1.04)

0.2

Genetic liability to autism

IBD

0.90 (0.73, 1.11)

0.32

Genetic liability to autism

UC

0.95 (0.77, 1.18)

0.65

Genetic liability to autism

Crohn’s

0.85 (0.63, 1.15)

0.29

  1. ORs, 95% CIs, and P values calculated by inverse variance-weighted (IVW) Mendelian randomization. There were no multiple-test corrections made.