Table 1.

Comparison of baseline demographic data and lifestyle characteristics of the infants and mothers among 3 study groups at birth

Values are presented as mean±standard deviation or number (percentile).

Group A, formula-fed; Group B, breast-fed with no supplementation; Group S, breast-fed with vitamin D supplementation.

^*P value by χ²-test for categorical variables, ANOVA for continuous variables.

GP, gestational period; HC, head circumference; Edu, education; Jun-Nov, June through November.