Extra questions were put forth for obtaining details about
some items such as snacks, drinks, or extra salt in the
case of subjects, who hardly remembered about what they
had eaten in the past 24 hours. The indicated iron intakes
incorporated both food and supplements sources. Iron intake
from a 24-hour recall was assessed by using a computerized
nutrient intake analysis program (CAN-Pro 3.0,
Korean Nutrition Society, Seoul, Korea). The consumption
of nutritional supplements was investigated on the
basis of self-reporting on the same day, when the dietary
questionnaire was administered. Information on type and
brand name of supplements and amounts and frequency
of its use was also directly gathered from the participants.
Maternal total iron intake incorporated both dietary iron
and in the form of supplements.