Anemia in Pregnancy: Screening and Clinical Management Strategies

A meta-analysis of ferric carboxymaltose versus other intravenous iron preparations for the management of iron deficiency anemia during pregnancy

Objective

We conducted a meta-analysis of randomized clinical trials evaluating the clinical effects of ferric carboxymaltose therapy compared to other intravenous iron in improving hemoglobin and serum ferritin in pregnant women. We also assessed the safety of ferric carboxymaltose vs. other intravenous iron.

Data source

EMBASE, PubMed, and Web of Science were searched for trials related to ferric carboxymaltose in pregnant women, published between 2005 and 2021. We also reviewed articles from google scholar. The keywords "ferric carboxymaltose," "FCM," "intravenous," "randomized," "pregnancy," "quality of life," and "neonatal outcomes" were used to search the literature. The search was limited to pregnant women.

Selection of studies

Studies related to ferric carboxymaltose in pregnancy were scanned. Observational studies, review articles, and case reports were excluded. Randomized studies in pregnant women involving ferric carboxymaltose and other intravenous iron formulations were shortlisted. Of 256 studies, nine randomized control trials were selected.

Data collection

Two reviewers independently extracted data from nine selected trials.

Data synthesis

The final effect size for increase in hemoglobin after treatment was significant for ferric carboxymaltose vs. iron sucrose/iron polymaltose (standard mean difference 0.89g/dl [95% confidence interval 0.27,1.51]). The final effect size for the increase in ferritin after treatment was more for ferric carboxymaltose vs. iron sucrose/iron polymaltose (standard mean difference 22.53µg/L [-7.26, 52.33]). No serious adverse events were reported with ferric carboxymaltose or other intravenous iron.

Conclusion

Ferric carboxymaltose demonstrated better efficacy than other intravenous iron in increasing hemoglobin and ferritin levels in treating iron deficiency anemia in pregnant women.

Development and validation of a novel food exchange system for Chinese pregnant women

BACKGROUND

The dietary nutritional status of pregnant women is critical for maintaining the health of both mothers and infants. Food exchange systems have been employed in the nutritional guidance of patients in China, although their application in the dietary guidance of healthy pregnant women is quite limited. This study aimed to develop a novel food exchange system for Chinese pregnant women (NFES-CPW) and evaluate the relative validation of its application.

METHODS

NFES-CPW covers approximately 500 types of food from ten categories and has more elaborate food portion sizes. It established a recommendation index for guiding food selection and used energy, water content, and protein as the exchange basis to balance the supply of energy and important nutrients throughout pregnancy. Furthermore, dietitians used the NFES-CPW and traditional food exchange system to generate new recipes based on the sample recipe. There were 40 derived recipes for each of the two food exchange methods. The food consumption, energy, and key nutrients of each recipe were calculated, and the differences between the two food exchange systems were compared using the Wilcoxon rank sum test or the Chi-square test.

RESULTS

The results revealed that compared to those derived from traditional food exchange system, the NFES-CPW derived recipes had a better dietary structure, as evidenced by the intakes of whole-grain cereals, beans excluding soybeans, potatoes, fruits, fish, shrimp and shellfish, as well as eggs (P < 0.05), which were more conducive to reaching the recommended range of balanced dietary pagoda. After calculating energy and nutrients, although these two food exchange systems have similar effects on the dietary energy and macronutrient intake of pregnant women, the intake of micronutrients in NFES-CPW derived recipes was significantly higher than that from the traditional food exchange system, which was more conducive to meeting the dietary requirements of pregnant women. The outstanding improvement are primarily vitamin A, vitamin B2, folic acid, vitamin B12, vitamin C, calcium, iron, and iodine (P < 0.05). Moreover, when compared to recipes obtained from the traditional food exchange system, the error ranges of energy and most nutrients were significantly reduced after employing the NFES-CPW.

CONCLUSIONS

Therefore, NFES-CPW is an appropriate tool that adheres to Chinese dietary characteristics and can provide suitable dietary guidance to pregnant women.

Analysis of risk factors and construction of nomograph model for critical condition of patients with hypertension during pregnancy

OBJECTIVE

This study aims to construct the risk prediction nomogram model of critical condition in patients with hypertension during pregnancy and to verify its evaluation effect.

METHODS

A total of 531 patients with hypertension during pregnancy were randomly grouped into 427 model group and 104 validation group. The model group patients included 59 cases of critical group and 368 cases of non-critical group according to the occurrence of critical situation. Multivariate Logistic regression analysis was conducted to determine the risk factors of critical condition in patients with hypertension during pregnancy, and R software was used to construct the nomogram model. Moreover, the prediction efficiency of the model was evaluated.

RESULTS

The proportions of patients aged over 30 years, with an educational background of junior high school or below, a family history of hypertension, anemia during pregnancy, and a lower erythrocyte count were significantly higher in the critical group compared to the non-critical group (P < 0.05). Age > 30 years old, educational background of junior high school and below, family history of hypertension, anemia during pregnancy, and red blood cell count were independent risk factors for the occurrence of critical condition in patients with hypertension during pregnancy (P < 0.05). The prediction model formula Z = 1.857×Age + 1.167×Education + 1.601×Family history of hypertension + 1.815×Pregnancy anemia + 3.524×Red blood cell count+(-19.769). The area under the curve (AUC) of the nomogram in the modeling group for predicting the risk of critical situations was 0.926 (95% CI = 0.887 ~ 0.964), indicating excellent discrimination. The calibration curve closely resembled the ideal curve, demonstrating good agreement between the predicted and actual values. The AUC of the validation group's nomogram to predict the risk of critical situation was 0.942 (95% CI = 0.872 ~ 0.998), with good discrimination. The calibration curve was close to the ideal curve, and the actual value was in good agreement with the predicted value.

CONCLUSION

The nomograph model can predict the risk of critical condition in patients with hypertension during pregnancy and screen high-risk population.

The prevalence of undiagnosed thalassemia minor among primigravida pregnant women before 20 weeks of gestation

Pregnancy-associated anemia is a widespread condition that can have varying impacts on both the mother and the developing fetus, depending on the level of hemoglobin in the mother's blood and the stage of pregnancy at which the anemia occurs. In Iraq, 27% of all registered thalassemia cases are thalassemia minor. Pregnancy may aggravate mild undiagnosed thalassemia early in pregnancy. The objective of the study was to access the prevalence of undetected thalassemia minor in primigravida women who received prenatal care before 20 weeks and to compare the demographic and socioeconomic characteristic features between women with iron-deficiency anemia (IDA) and those without any anemia. A total of 298 primigravida women who attended prenatal care at 20 weeks or less were recruited and their hematocrit level was assessed. Participants were segregated into two groups regarding the presence of anemia. Patients who had packed cell volume lower than 33% underwent iron study and standard Hb electrophoresis. Information about women's demographics, socioeconomic status, and family history of hereditary anemia were recorded. The participants had a mean age of 22.7 years, with an age range spanning from 16 to 43 years. 33.33% of 298 women had pathological anemia. All the participants exhibited microcytic anemia, with 26.85%, had confirmed IDA, whereas 6.71% had β thalassemia minor (BTM) phenotype. Both BTM and IDA patients frequently reported a positive family history of anemia at 80% and 68.7%, respectively, which was significantly greater than the control group at 39.9% (P = 0.001). No significant differences were seen between BTM and IDA in terms of age or socioeconomic status. Anemia due to undetected thalassemia minor was common among primigravida women. Screening for BTM carriers pregnant can help in monitoring their status, assessing the fetus's risk of developing thalassemia, and making a diagnosis in communities with high rates of consanguineous marriages, such as Iraq.

Prevalence and risk factors of anemia in first, second and third trimesters of pregnancy in Iran: A systematic review and meta-analysis

Anemia is a common health problem during pregnancy worldwide that has many short-term and long-term effects on women. This study examined the Prevalence and Risk factors of anemia in first, second and third trimesters of pregnancy in Iran between 2000 and 2021. PubMed, Medline, Scopus, Google Scholar, and national databases of Magiran and SID were searched for articles, which were then subjected to PRISMA-compliant screening. A systematic review and meta-analysis (using a random-effects model in STATA version 17) were conducted on the 18 eligible cross-sectional studies (published between July 23, 2000 and September 1, 2021) that revealed significant data on the prevalence of anemia in pregnant women. This study included 18 reports with a total of 25,831 individuals in which 15% of study subjects had anemia (95% CI: 12-19%). The pooled prevalence of anemia was 13% in people older than 26 years old (95% CI: 9-17%) compared to 22% in people younger than 26 years old (95% CI: 15-29). It was 18% (95% CI: 11-27%) for pregnant women having their second child in comparison to 20% (95% CI: 11-32%) for women who have had three or more children. Anemia was thought to affect 11% of housewives (95% CI: 2-26%) and 10% of working women (95% CI: 6-16%). Anemia frequency was 22%, 17% and 13% amongst first (22%), second (17%), and third (13%) trimesters, respectively. Nevertheless, it happened much less often after the second trimester. Moreover, poor education, a history of low birth weight in children, and a low socioeconomic level within women were associated with the prevalence of anemia. The pooled prevalence of anemia in pregnant women is marginally lower than in earlier report. However, it seems to be a health problem in developing countries including Iran currently. Therefore, the study suggest that health system should design comprehensive preventive and control measurements such as more effective treatments to minimize anemia in vulnerable segments of society, particularly mothers, and improve their health through increasing access to services for mothers.

Factors associated with birth asphyxia among term singleton births at two referral hospitals in Northern Uganda: a cross sectional study

Background

Birth asphyxia is one of the leading causes of neonatal mortality worldwide. In Uganda, it accounts for 28.9% of all neonatal deaths. With a view to inform policy and practice interventions to reduce adverse neonatal outcomes, we aimed to determine the prevalence and factors associated with birth asphyxia at two referral hospitals in Northern Uganda.

Methods

This was a cross-sectional study, involving women who gave birth at two referral hospitals. Women in labour were consecutively enrolled by the research assistants, who also attended the births and determined Apgar scores. Data on socio-demographic characteristics, pregnancy history and care during labour, were obtained using a structured questionnaire. Participants were tested for; i) malaria (peripheral and placental blood samples), ii) syphilis, iii) white blood cell counts (WBC), and iv) haemoglobin levels. The prevalence of birth asphyxia was determined as the number of newborns with Apgar scores < 7 at 5 min out of the total population of study participants. Factors independently associated with birth asphyxia were determined using multivariable logistic regression analysis and a p-value < 0.05 was considered statistically significant.

Results

A total of 2,930 mother-newborn pairs were included, and the prevalence of birth asphyxia was 154 [5.3% (95% confidence interval: 4.5- 6.1)]. Factors associated with birth asphyxia were; maternal age ≤ 19 years [adjusted odds ratio (aOR) 1.92 (1.27–2.91)], syphilis infection [aOR 2.45(1.08–5.57)], and a high white blood cell count [aOR 2.26 (1.26–4.06)], while employment [aOR 0.43 (0.22–0.83)] was protective. Additionally, referral [aOR1.75 (1.10–2.79)], induction/augmentation of labour [aOR 2.70 (1.62–4.50)], prolonged labour [aOR 1.88 (1.25–2.83)], obstructed labour [aOR 3.40 (1.70–6.83)], malpresentation/ malposition [aOR 3.00 (1.44–6.27)] and assisted vaginal delivery [aOR 5.54 (2.30–13.30)] were associated with birth asphyxia. Male newborns [aOR 1.92 (1.28–2.88)] and those with a low birth weight [aOR 2.20 (1.07–4.50)], were also more likely to develop birth asphyxia.

Conclusion

The prevalence of birth asphyxia was 5.3%. In addition to the known intrapartum complications, teenage motherhood, syphilis and a raised white blood cell count were associated with birth asphyxia. This indicates that for sustained reduction of birth asphyxia, appropriate management of maternal infections and improved intrapartum quality of care are essential.