Korean Journal of Community Nutrition

Original Articles

[English]
Serum Iron Concentration of Maternal and Umbilical Cord Blood during Pregnancy: Hey Mi Jang, Hong Seok Ahn; Korean J Community Nutr 2005;10(6):860-868. Published online December 31, 2005

Abstract PDF: Anemia diagnosed early in pregnancy is associated with increased risks of low birth weight and preterm delivery. The purposes of this study were to assess the maternal iron status during pregnancy and to evaluate the relationships between the iron indices of maternal-umbilical cord serum iron and ferritin levels and pregnancy outcomes. Dietary intakes of the pregnant women were estimated by 24 hour-recall (3 times). Serum iron and ferritin levels in maternal blood and umbilical cord were measured at 1st-, 2nd-, 3rd- trimester and delivery, respectively. The mean of maternal serum iron levels of the trimester and delivery were 124.27microgram/dl, 97.03microgram/dl, 94.32microgram/dl, and 145.53microgram/dl. Those maternal levels were significantly lower than that of umbilical cord blood (222.59microgram/dl). Serum ferritin levels of maternal trimester and delivery were 22.68microgram/l, 11.09microgram/l, 14.18microgram/l and 24.54microgram/l, which were significantly lower than those of umbilical cord blood (184.35microgram/l)(p<0.0001). This prevalence of anemia of total subjects was 30.3% by WHO criteria (Hb<11.0 g/dl, Hct<33%). Iron levels of 2nd-trimester was significantly higher in the normal group than in the anemia group. And ferritin levels of 3rd-trimester and delivery was significantly higher in the normal group than in the anemia group. Therefore, we suggest for successful pregnancy outcome and delivery differential iron supplementation programs will be carried out with individual pregnant women on the basis of pre-pregnancy nutrition.

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[English]
Effects of Iron Supplementation on Iron Status of Anomic High School Girls: Soon Myung Hong, Hye Jin Hwang; Korean J Community Nutr 2001;6(5):726-733. Published online December 31, 2001

Abstract PDF: This study was designed to investigate the effect of iron supplementation on the iron nutritional status and anemia of high school girls in Korea. One hundred thirty-five female students residing in Ulian metropolitan city in Korea diagnosed as having anemia or iron deficiency participated in this study. One or two tablets of iron medicine(80-160 mg Fe as ferrous sulfate/day) were administered to all participants for 3 months. Subjects were evaluated with a questionaire, measurement of hematological indices before and after iron supplementation. The average height and weight of respondents were 161.62 +/- 4.68 cm and 53.87 +/- 6.10 kg, respectively. Daily intakes of energy were 1597.8 +/- 302.35 kcal(76.0% RDA). Iron intakes were 13.72 +/- 4.17 mg (76.3% of RDA) and calcium intakes were 580.74 +/- 177.21(72.5% of RDA) before iron supp]ementation. At baseline, 63% of all participants had depleted store(serum ferritin 12 ug/ml and/or transferrin saturation(TS)<14%). After iron supplementation, this proportion declined to 19.3%. 55.6% of subjects had 12 ug/m1 of basal ferritin concentration before iron supplementation, and this proportion declined to 16.3% after iron supplementation. The basal hemoglobin(Hb) concentrations were 12.13 +/- 1.01 g/dl and they increased to 12.79 +/- 0.81 g/dl, which showed significant difference artier iron supplementation(p<0.001). The basal ferritin and TS(%) were 13.24 +/- 11.66 ng/ml, 18.42 +/- 10.12% and they significantly increased to 32.95 +/- 21.14 ng/ml, 33.53 +/- 16.64%, respectively(p<0.001). The basal total iron binding protein(TIBC) were 467.81 +/- 97.24 ug/dl and they significantly decreased to 325.05 +/- 48.89 ug/dl(p<0.001) after iron supplementation. The number of tablets administered was positively correlated with serum iron(t = 0.553, p<0.01), serum ferritin(t = 0.557, p<0.01), TS(%)(t = 0.588, p<0.01) and negatively correlated with TIBC(t= -0.409, p<0.01). The anemia symptoms such as 'Shortening of breath when going upstairs(p<0.01)', 'Tired out easily(p<0.01)', 'Feeling blue(p<0.001)', 'Decreased ability to concentrate(p<0.01)', and 'Poor memory(p<0.001)'improved significantly after iron supplementation. In this study, daily iron supplementations were efficacious in improving the iron status and anemic symptoms of female high school students. Regular check-ups and nutrition education for adolescents are necessary because of their vulnerability to iron deficiency. Further studies are needed to determine the minimum effective dose of iron and to examine the adverse effect of long-term iron supplementation.

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Randomized Controlled Trial

[English]
Effect of Vitamin C Supplementation on Iron Status of Adolescent Girls with Low Hemoglobin Levels: Joung Won Lee, Chun Keun Park; Korean J Community Nutr 1997;2(5):687-694. Published online December 31, 1997

Abstract PDF: This study investigated the effects of vitamin C supplementation on the nutritional iron status of 31 adolescent girls, aged 12-15 years, with low hemoglobin levels. They were randomly divided into four groups, and for two groups daily150 mg or 900 mg of L-ascorbic acid(AsA) was given in three equal doses at three meals during 9 weeks. To another group daily 60 mg iron as ferrous sulfate was given in the same way as AsA. The control group was given sugar placebo. Body iron status was monitored through the determination of Hb, Hct, MCHC, and serum ferritin concentrations. Dietary AsA and iron intakes were measured from food consumption surveys performed by 3-day 24-hour recalls. The amount of absorbed iron was estimated from the model of Monsen et al. The average amounts of food iron for four groups were 12.3- 15.0 mg and 11.1 - 18.9 mg at initial and at final period of the supplementation trial, respectively. The tentatively estimated amount of absorbed iron was significantly increased in the 900 mg AsA and iron supplementing groups, but not in the 150 mg AsA and placebo groups. Both Hb and MCHC were improved to above normal levels in all groups except the placebo group. Hct was elevated only in the AsA 900 mg group whose Hct was relatively lower than the other groups. Serum ferritin concentrations of the four groups, which were as low as 8.50 - 14.39ng/mL on average at the intial periods, augmented significantly to 20.18ng/mL and 26.63ng/mL in the 900 mg AsA and iron groups, respectively. Serum ferritin was not elevated in either the AsA 300 mg group or the placebo group. The above data indicated that the daily supplementaion of 150 mg AsA to the meals containing 12-15 mg iron per day promoted Hb levels of adolescent girls with low Hb, and the 900 mg AsA supplementing improved not only Hb level but also body iron store. A supplementation of 60 mg iron per day appeared to be slightly more effective in improving the iron status in comparison to the 900 mg AsA supplement.

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Original Article

[English]
Iron Nutritional Status of Female Students in Kangnung National University: Kyukee Lee, Eunkyung Kim, Mikyung Kim; Korean J Community Nutr 1997;2(1):23-32. Published online February 28, 1997

Abstract PDF: To evaluate iron nutritional status of female college students, fasting blood samples were taken from 76 female students of Kangnung National University. Hemoglobin(Hb), hematocrit(Hct), serum iron(Fe), total iron binding capacity(TIBC) and serum ferritin concentrations were measured and transferrin saturation was calculated. Mean values for Hb, Hct, Fe, TIBC, TS and serum freeitin were 13.64+/-1.42g/dl, 40.99+/-4.31%, 103.0+/-33.3 microgram/dl, 395.3+/-9.07 microgram/dl, 26.58+/-9.07%and 26.76+/-17.5ng/ml, respectively. Prevalence of iron deficiency greatly varied by indices from 6.8% when judged by Hct to 26.0% by serum ferritin concentration. The Hb concentration was positively correlated with hematocrit (r=0.5402), serum iron(r=0.2819) and transferrin saturation(r=0.2777)(p<0.05). on the other hand, serum ferritin concentration showed significantly negative correlation with TIBC(r=-0.3196). Two-day dietary intake records were collected from subjects to estimate mean daily iron intake and bioavailability of dietary iron. Mean daily intake of iron was 13.15 mg and heme iron intake was 0.83 mg which was 6.4% of total iron intake. Total absorbable iron calculated by the method of Monsen was 1.27 mg and bioavailability of dietary iron was 9.6%. In the light of high prevalence of iron deficiency based of serum ferritin concentration and low bioavailability of iron in the diet, guidelines about diet should be made to increase the content and bioavailability of iron in the diet if female college students.

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