Baseline characteristics by home-visit group and no home-visit group.

Note from questionnairea"Do you have any disease that is currently under treatment or was treated in the past?"b From risk assessment by public health nurses in first interview.c From risk assessment by public health nurses in first interview.d Prenatal mothers who emigrated to Japan or were staying in Japan long-term.e ‘satogaeri’: a tradition in which pregnant women return to the family home prior to delivery to stay with their parents for support before and after childbirth.Baseline characteristics by home-visit group and no home-visit group.