Iron status and risk factors of iron deficiency among pregnant women in Singapore: a cross-sectional study.
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ABSTRACT:
SUBMITTER: Loy SL
PROVIDER: S-EPMC6460529 | biostudies-literature | 2019 Apr
REPOSITORIES: biostudies-literature
Publications
Iron status and risk factors of iron deficiency among pregnant women in Singapore: a cross-sectional study.
Loy See Ling SL Lim Li Min LM Chan Shiao-Yng SY Tan Pei Ting PT Chee Yen Lin YL Quah Phaik Ling PL Chan Jerry Kok Yen JKY Tan Kok Hian KH Yap Fabian F Godfrey Keith M KM Shek Lynette Pei-Chi LP Chong Mary Foong-Fong MF Kramer Michael S MS Chong Yap-Seng YS Chi Claudia C
BMC public health 20190411 1
<h4>Background</h4>Iron deficiency is the most prevalent nutrient deficiency and the most common cause of anaemia worldwide. Because of the increased iron requirements during pregnancy, iron deficiency can lead to maternal anaemia and reduced newborn iron stores. We examined the proportion and risk factors of iron deficiency among pregnant women in a developed Asian country.<h4>Methods</h4>Within a prospective cohort in Singapore, 985 Asian women were assessed for iron status at 26-28 weeks' ges ...[more]
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Project description:BackgroundAnaemia during pregnancy causes adverse outcomes to the woman and the foetus, including anaemic heart failure, prematurity, and intrauterine growth restriction. Iron deficiency anaemia (IDA) is the leading cause of anaemia and oral iron supplementation during pregnancy is widely recommended. However, little focus is directed to dietary intake. This study estimates the contribution of IDA among pregnant women and examines its risk factors (including dietary) in those with moderate or severe IDA in Lagos and Kano states, Nigeria.MethodsIn this cross-sectional study, 11,582 women were screened for anaemia at 20-32 weeks gestation. The 872 who had moderate or severe anaemia (haemoglobin concentration < 10 g/dL) were included in this study. Iron deficiency was defined as serum ferritin level < 30 ng/mL. We described the sociodemographic and obstetric characteristics of the sample and their self-report of consumption of common food items. We conducted bivariate and multivariable logistic regression analysis to identify risk factors associated with IDA.ResultsIron deficiency was observed among 41% (95%CI: 38 - 45) of women with moderate or severe anaemia and the prevalence increased with gestational age. The odds for IDA reduces from aOR: 0.36 (95%CI: 0.13 - 0.98) among pregnant women who consume green leafy vegetables every 2-3 weeks, to 0.26 (95%CI: 0.09 - 0.73) among daily consumers, compared to those who do not eat it. Daily consumption of edible kaolin clay was associated with increased odds of having IDA compared to non-consumption, aOR 9.13 (95%CI: 3.27 - 25.48). Consumption of soybeans three to four times a week was associated with higher odds of IDA compared to non-consumption, aOR: 1.78 (95%CI: 1.12 - 2.82).ConclusionAbout 4 in 10 women with moderate or severe anaemia during pregnancy had IDA. Our study provides evidence for the protective effect of green leafy vegetables against IDA while self-reported consumption of edible kaolin clay and soybeans appeared to increase the odds of having IDA during pregnancy. Health education on diet during pregnancy needs to be strengthened since this could potentially increase awareness and change behaviours that could reduce IDA among pregnant women with moderate or severe anaemia in Nigeria and other countries.
| S-EPMC10768359 | biostudies-literature
Project description:BackgroundThe current evidence about anemia and iron deficiency anemia (IDA) during pregnancy remains elusive in China. The purpose of this study is to investigate the prevalence of anemia and IDA and their risk factors in Chinese pregnant women.MethodsA nationwide cross-sectional survey of pregnant women was conducted during their antenatal visits. Using a multi-stage sampling method, 24 hospitals from 16 provinces across China were selected. Structured questionnaires were administered to collect information from participants and to extract clinical data from electronic medical records. Mixed-effects logistic regression models were performed to determine the risk factors associated with anemia and IDA.ResultsIn total, 12,403 pregnant women were enrolled, including 1018 (8.2%) at the first trimester, 3487 (28.1%) at the second, and 7898 (63.7%) at the third. Overall, 19.8% of women were diagnosed with anemia and 13.9% were diagnosed with IDA. The prevalence of anemia and IDA varied among regions and increased by gestational month, peaking at the eighth gestational month (24.0% for anemia and 17.8% for IDA). Pregnant women at advanced stage of gestation, non-local residents, multiple gestations, multiparity, pre-pregnancy underweight, and those experiencing severe nausea or vomiting during pregnancy, were associated with higher risks of anemia and IDA.ConclusionsThe prevalence of anemia and IDA during pregnancy are similar to those from developed countries and vary across regions in China.
| S-EPMC7648278 | biostudies-literature
Project description:Anemia and micronutrient (MN) deficiencies in pregnant women are associated with adverse pregnancy outcomes. In Niger, 58.6% of pregnant women are anemic; however, MN statuses are unknown. The study objectives were to estimate the prevalence of MN deficiencies among pregnant women in Zinder, Niger and explore associated risk factors. Pregnant women living in randomly selected rural villages (n = 88) were included. Capillary and venous blood samples (n = 770) were analyzed for hemoglobin (Hb) and plasma ferritin, soluble transferrin receptor (sTfR), zinc (pZn), retinol binding protein (RBP), folate and vitamin B12. C-reactive protein and alpha-1-acid glycoprotein were measured to adjust for inflammation. The prevalence of MN deficiencies in pregnant woman was high, indicative of a severe public health problem. Prevalence of iron deficiency was 20.7% and 35.7%, by ferritin (<15 µg/L) and sTfR (>8.3 mg/L), respectively. In total, 40.7% of women had low pZn (<50 µg/dL), 79.7% had marginal RBP (<1.32 µmol/L), 44.3% of women had low folate (<10 nmol/L) and 34.8% had low B12 concentrations (<148 pmol/L). Common risk factors associated with MN status included gravidity, mid-upper-arm circumference, geophagy, malaria, and result of the woman's last pregnancy. Interventions to promote the strengthening of antenatal care, and access and adherence to nutrition and health interventions are critical among pregnant women in this population.
| S-EPMC5452160 | biostudies-literature
Project description:ObjectivesThis study aimed to understand the impact of iron deficiency anemia in female users of a hematology service in a developing country.DesignRetrospective cross-sectional study of adult and adolescent women with iron deficiency anemia who presented to a hospital department of hematology.SettingA tertiary university hospital inpatient and outpatient hematology service.ParticipantsAll female patients who were ?13 years of age with confirmed iron deficiency anemia and received hospital hematology services.ResultsA total of 208 patients were enrolled and analyzed in the registry. The mean age of the patients was 41.4 years (range, 14-82). A total of 195 patients had anemia that was moderate or severe according to the World Health Organization anemia classification with 13 patients having mild anemia. A total of 108 patients had comorbidities, which were primarily endocrine and cardiovascular. Iron deficiency anemia was associated with very heavy (n = 56, 30%) or heavy menses (n = 84, 45%) in 140 patients and was associated with poor (<200 g/week of red meat) (n = 101, 54%) or very poor (vegan, strict vegetarian) nutrition (n = 34, 18%) in 135 patients. A total of 101 patients had a previous pregnancy history with a mean of six previous pregnancies (range, 1-11 pregnancy episodes per patient). Blood film was performed on all patients; only four had a picture consistent with thalassemia minor.ConclusionIron deficiency anemia is caused by multiple factors. Heavy menses and low consumption of red meat were found to be associated with the severity of anemia. Our findings may be useful for healthcare planners and policy makers in increasing efforts to reduce the prevalence and severity of iron deficiency anemia among women in Jordan.
| S-EPMC6218028 | biostudies-literature
Project description:Anemia in pregnancy is defined as a hemoglobin level of <11 g/dl, and is commonly due to iron deficiency. This systematic review was conducted to determine the prevalence and risk factors of anemia and iron deficiency among pregnant women in Malaysia. A systematic literature search was conducted in Google Scholar, PubMed, and Cochrane Library databases. We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guideline. Eight studies comprising a total number of 2,638 pregnant women were included in this review. Only two studies focused on iron deficiency, whereas the other six investigated anemia in pregnancy without specifying iron deficiency or any other nutritional cause for the anemia, signifying the lack of published literature on this important public health nutritional issue in Malaysia. The overall prevalence of anemia in pregnancy ranged from 19.3 to 57.4%, while the prevalence of iron deficiency was 31.6 to 34.6%. Factors that were significantly associated with anemia in pregnancy were extremes of reproductive age, late antenatal booking, non-compliance to hematinics, Indian ethnicity, being in the second or third trimester, low maternal educational level, low family income, and unemployment. The prevalence of anemia in pregnancy was found to be higher in rural compared to urban areas. Meanwhile, in terms of iron deficiency anemia, grandmultiparity, late antenatal booking and Indian ethnicity were significant determinants. It is certainly plausible that the anemia in pregnancy reported in these studies is not entirely secondary to iron deficiency and may be attributable to other nutritional deficiencies, emphasizing the importance of researching deeper into this subject. Nevertheless, in the meantime, focusing on iron supplementation in high-risk mothers with emphasis on compliance, seems to be the best option, in view of the high prevalence of iron deficiency found in this review.
| S-EPMC9051477 | biostudies-literature
Project description:PURPOSE:Voluntary salt iodization at 50 mg/kg salt ensures adequate iodine nutrition in Swedish school-aged children, but iodine status in pregnant women is uncertain. METHODS:We conducted a cross-sectional national study of 743 pregnant women, at median gestational age of 23 weeks (IQR 9, 38), recruited from maternal health care centers. We measured: urinary iodine concentration (UIC) and urinary creatinine concentration in spot urine samples; thyroglobulin (Tg), thyroid-stimulating hormone (TSH), and total thyroxine (tT4) on dried blood spots (DBS); and thyreoperoxidase antibodies in serum samples. Data on dietary supplement use were obtained, and women were classified as supplement users (consuming multivitamins containing???150 µg iodine/day) and non-supplement users (no supplements or?<?150 µg iodine/day from supplements). RESULTS:Overall median UIC [bootstrapped 95% confidence interval (CI)] was 101 µg/L (95, 108; n?=?737): 149 µg/L (132, 164) in supplement users (n?=?253) and 85 µg/L (79, 92) in non-supplement users (n?=?440) (p?<?0.001). Overall geometric mean DBS-Tg (95% CI) was 22.1 ?g/L (20.8, 23.5; n?=?675) and the prevalence of elevated DBS-Tg was 19%. DBS-Tg was lower in supplement users (n?=?229) than in non-supplement users (n?=?405) (19.1 vs 24.4 ?g/L, p?<?0.001). DBS-TSH, DBS-tT4, and S-TPOab positivity did not differ between the two groups. CONCLUSIONS:Pregnant women in Sweden have inadequate iodine nutrition. Women not taking iodine supplements containing???150 µg iodine/day are affected by mild iodine deficiency and are at higher risk for increased thyroid activity, while maintaining euthyroidism. Iodine intake should be improved in women both before and after conception by promotion of iodized salt instead of non-iodized salt. We urge regular monitoring of iodine status in the general Swedish population, as well as in risk groups.
| S-EPMC7413865 | biostudies-literature
Project description:BackgroundCOVID-19 may predispose pregnant women to higher risks of severe disease and poorer neonatal outcome. Psychological sequalae of this pandemic may pose a greater conundrum than its clinical aspects. It is currently unknown that how pregnant women cope with this global pandemic and its ramifications. The aims of the study are to understand the attitudes and precaution practices of non-infected pregnant women towards the COVID-19 outbreak in Singapore.MethodsAn online cross-sectional survey of COVID-19 awareness among pregnant women attending antenatal clinics in Singapore was conducted. An internet link was provided to complete an online electronic survey on Google platform using a quick response (QR) code on mobile devices. The online survey consists of 34 questions that were categorized into 4 main sections, namely 1) social demographics 2) attitude on safe distancing measures 3) precaution practices and 4) perceptions of COVID-19. Multiple linear regression analysis was performed to examine women's precaution practices among six independent socio-demographic variables, including age, ethnicity, education, front-line jobs, history of miscarriage and type of antenatal clinic (general, high risk).ResultsA total of 167 survey responses were obtained over 8 weeks from April to June 2020. The majority of women were aged ≤35 years (76%, n = 127), were of Chinese ethnicity (55%, n = 91), attained tertiary education (62%, n = 104) and were not working as frontline staff (70%). Using multiple linear regression models, Malay ethnicity (vs. Chinese, β 0.24; 95% CI 0.04, 0.44) was associated with higher frequency of practicing social distancing. Malay women (β 0.48; 95% CI 0.16, 0.80) and those who worked as frontline staff (β 0.28; 95% CI 0.01, 0.56) sanitized their hands at higher frequencies. Age of ≥36 years (vs. ≤30 years, β 0.24; 95% CI 0.01, 0.46), Malay (vs. Chinese, β 0.27; 95% CI 0.06, 0.48) and Indian ethnicity (vs. Chinese, β 0.41; 95% CI 0.02, 0.80), and attendance at high-risk clinic (vs. general clinic, β 0.20; 95% CI 0.01, 0.39) were associated with higher frequency of staying-at-home.ConclusionSocial demographical factors including age > 36 years old, Malay ethnicity, employment in front line jobs and attendance at high-risk clinics are likely to influence the attitudes and precaution practices among pregnant women towards COVID-19 in Singapore. Knowledge gained from our cross-sectional online survey can better guide clinicians to communicate better with pregnant women. Hence, it is important for clinicians to render appropriate counselling and focused clarification on the effect of COVID-19 among pregnant women for psychological support and mental well being.
| S-EPMC7652671 | biostudies-literature
Project description:Vitamin D is involved in the pathophysiology of anemia. This cross-sectional study was conducted using the Nationwide Nutrition and Health Survey in Pregnant Women in Taiwan database. We investigated associations among dietary patterns (DPs), vitamin D, and iron-related biomarkers in pregnant women. The principal component analysis revealed four DPs. Linear and logistic regression analyses were performed to investigate the association of DPs with anemia-related biomarkers. Plant-based, carnivore, and dairy and nondairy alternatives DPs were positively associated with serum vitamin D levels. After adjusting covariates, the pregnant women consuming plant-based DPs at the mid-tertile (T2) were associated with reduced risks of low serum folate and vitamin D levels, and those consuming carnivore DPs at higher tertiles (T2 and/or T3) were correlated with an increased risk of low serum iron levels but decreased risks of low serum transferrin saturation, vitamin B12, and vitamin D levels. The pregnant women consuming dairy and nondairy alternatives DPs at the highest tertile (T3) were associated with reduced risks of low serum folate and vitamin B12 levels. However, the processed food DP was not correlated with anemia-related biomarkers. Thus, plant-based, carnivore, and dairy and nondairy alternatives DPs were associated with the risk of low-serum-anemia-related variables.
| S-EPMC10143533 | biostudies-literature
Project description:BackgroundMalaria in pregnancy remains a public health problem in sub-Saharan Africa. Identifying risk factors for malaria in pregnancy could assist in developing interventions to reduce the risk of malaria in Burkina Faso and other countries in the region.MethodsTwo cross-sectional surveys were carried out to measure Plasmodium falciparum infection using microscopy in pregnant women in Saponé Health District, central Burkina Faso. Data were collected on individual, household and environmental variables and their association with P. falciparum infection assessed using multivariable analysis.ResultsA total of 356 pregnant women were enrolled in the surveys, 174 during the dry season and 182 during the wet season. The mean number of doses of sulfadoxine-pyrimethamine for Intermittent Preventive Treatment in pregnancy (IPTp-SP) was 0.4 doses during the first trimester, 1.1 doses at the second and 2.3 doses at the third. Overall prevalence of P. falciparum infection by microscopy was 15.7%; 17.8% in the dry season and 13.7% in the wet season. 88.2% of pregnant women reported sleeping under an insecticide-treated net (ITN) on the previous night. The odds of P. falciparum infection was 65% lower in women who reported using an ITN compared to those that did not use an ITN (Odds ratio, OR = 0.35, 95% CI 0.14-0.86, p = 0.02). IPTp-SP was also associated with reduced P. falciparum infection, with each additional dose of IPTp-SP reducing the odds of infection by 44% (OR = 0.56, 95% CI 0.39-0.79, p = 0.001). Literate women had a 2.54 times higher odds of P. falciparum infection compared to illiterate women (95% CI 1.31-4.91, p = 0.006).ConclusionsThe prevalence of P. falciparum infection among pregnant women remains high in Burkina Faso, although use of IPTp-SP and ITNs were found to reduce the odds of infection. Despite this, compliance with IPTp-SP remains far from that recommended by the National Malaria Control Programme and World Health Organization. Behaviour change communication should be strengthened to encourage compliance with protective malaria control tools during pregnancy.
| S-EPMC8422625 | biostudies-literature
Project description:ObjectivesIron-folic acid non-compliance is a major problem in the study area. Therefore, this study aimed to assess the level of iron-folic acid supplementation compliance and associated factors among pregnant women.MethodsA community-based cross-sectional study design was conducted among pregnant women from 1 to 30 November 2018 in Dangila, Northern Ethiopia. A multi-stage sampling technique was used to select the participants. The data were collected using a structured questionnaire. For data entry and analysis, Epi Info 7 and Statistical Package for Social Science (SPSS) 23.0 were used, respectively. Bivariable and multivariable logistic regression analyses were done. Descriptive statistics like mean and standard deviation, and odds ratios with their respective confidence intervals were calculated. Statistically significant was declared at a p value of less than 0.05. The results were presented using text, tables, and figures.ResultsA total of 589 pregnant women were involved, yielding a response rate of 91.2%. The average age of the participants in the study was 30.90 ± 5.93 years. The average weekly iron-folic acid pill intake was 5.3. The iron-folic acid compliance rate was 76.9% (95% confidence interval: 73.5-80.6). Women who had four or fewer alive children (adjusted odds ratio = 2.68, 95% confidence interval: 1.37-5.23), took less than 30 min to get to the health facility (adjusted odds ratio = 1.90, 95% confidence interval: 1.16-3.10), being a government employee (adjusted odds ratio = 0.16, 95% confidence interval: 0.03-0.81), attended antenatal care conferences (odds ratio = 2,95% confidence interval: 1.16-3.42), and started iron-folic acid tablets in the first trimester (odds ratio = 2.3, 95% confidence interval: 1.39-3.87) were associated with iron-folic acid compliance.ConclusionThe level of iron-folic acid supplementation compliance was low. Attending antenatal care training and starting to take iron-folic acid pills early in the first trimester were both factors associated with iron-folic acid supplementation compliance. Health care and health extension workers should emphasize and monitor the iron pill-taking habits of pregnant women in home-to-home visits.
| S-EPMC9393355 | biostudies-literature