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Table 4 Prevalence and association of preconception folic acid supplement use according to status of preconception health visit to a doctor/gynecologist and status of pregnancy intention

From: Prevalence and determinants of preconception folic acid use: an Italian multicenter survey

Preconception health visit Pregnancy intentiona No. of womenb No. of supplement usersc Cruded Adjustede
Prevalence ratio 95 % confidence interval Prevalence ratio 95 % confidence interval
   n n %     
Nof Nof 584 28 4.8 1.00   1.00  
No Yes 659 97 14.7 2.98 1.93, 4.61 2.87 1.72, 4.79
Yes No 188 39 20.7 4.35 2.33, 8.12 4.08 2.29, 7.28
Yes Yes 712 346 48.6 9.69 5.68, 16.5 7.90 4.62, 13.5
  1. aStatus of pregnancy intention was defined as intended (yes) and unintended/mistimed (no)
  2. bData were missing for 30 women on pregnancy intention and 16 women on preconception health visit
  3. cAny supplement use that started before the last menstrual period
  4. dCrude prevalence ratio was estimated by log-binomial regression models
  5. eAdjusted for maternal age, parity, maternal education, marital status, Italian citizenship, infertility treatment, and maternal smoking before pregnancy
  6. fReference category