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Table 3 Characteristics of folic acid supplementation by sex of infant in northern China

From: Periconceptional folic acid supplementation and sex difference in prevention of neural tube defects and their subtypes in China: results from a large prospective cohort study

Characteristics N Women with male infants Women with female infants P-value
Folic acid supplementation (Months) 18,201 5.5(2.4) 5.5(2.4) 0.180
Timing 0.369
 Periconception 12,779 70.5 70.4  
 Preconception 3623 20.1 19.8  
 Postconception 1714 9.7 9.4  
Compliance 0.190
 < 80% 3310 17.9 18.6  
 ≥80% 14,839 82.1 81.4