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Table 1 Effect estimates (odds ratio) for spina bifida-affected pregnancies associated with maternal choline intake during the periconceptional period, California 1989–1991. OR: odds ratio; CI: confidence interval.

From: CHKA and PCYT1Agene polymorphisms, choline intake and spina bifida risk in a California population

Total choline intake (mg/day) Cases Controls OR 95% CI
  103 338   
Quartile Measure     
≤ 289.93 34 85 Reference  
289.93–372.01 22 84 0.66 0.35–1.21
372.02–513.24 27 85 0.79 0.44–1.43
> 513.24 20 84 0.60 0.32–1.12