CKD predicts incomplete revascularization and subsequent MACE in CCS patients

Egypt: Chronic kidney disease predicts partial revascularization and subsequent major adverse cardiovascular events (MACE) in patients with chronic coronary syndrome (CCS), a recent study published in the Indian Heart Journal has revealed.

The study showed that among patients with CCS, chronic kidney disease (CKD) is associated with a higher syntax score (SS) and incomplete revascularization prevalence. Additionally, an association was observed between incomplete revascularization and an increased risk of MACE.

Atherosclerotic plaque formation in the epicardial coronary arteries is the pathological hallmark of coronary artery disease (CAD). Several clinical manifestations can be classified as either chronic coronary syndrome or acute coronary syndrome due to the dynamic nature of the CAD process.

Chronic kidney disease and coronary artery disease constitute a high-risk combination. Despite its high prevalence, few studies have been conducted on CAD, specifically in CKD patients, frequently excluded from most trials. Therefore, there is a lack of evidence for CAD management, which might lead to the inadequate treatment of CKD patients.

To fill this knowledge gap, Shereen Ibrahim Farag, Benha University, Faculty of Medicine, Cardiology Department, Benha, Egypt, and colleagues aimed to determine the impact of CKD on the completeness of revascularization and MACE in patients with chronic coronary syndrome.

The study enrolled 400 patients with CCS who underwent revascularization by PCI. They were categorized into two categories according to their estimated glomerular filtration rate (eGFR) levels: the control group: 200 patients with eGFR ≥60mL/min/1.73m2, and the CKD Group: 200 patients with eGFR< 60ml/min/1.73m.

Reclassification of the patients was done according to revascularization into complete and incomplete revascularization groups with a one-year follow-up to assess the MACE.

Based on the study, the researchers reported the following findings:

  • CKD patients were significantly older (65.78 ± 6.41 versus 56.70 ± 9.20 years). They had higher contrast-induced nephropathy, syntax scores, all-cause mortality, heart failure, and MACE.
  • After reclassification according to revascularization, GFR was significantly reduced among patients with incomplete revascularization (51.08 ± 28.15 versus 65.67 ± 26.62, respectively).
  • Repeated revascularization, stent thrombosis, STEMI, MACE, stroke, and all-cause mortality were more prevalent among patients with incomplete revascularization.
  • Multivariate regression analysis revealed eGFR and SS as independent predictors of incomplete revascularization.
  • The optimal eGFR cutoff value for predicting partial revascularization is 49.50mL/min/1.73m2, with 58.8% sensitivity and 69.3 % specificity.

“The findings showed that chronic kidney disease is linked with a higher prevalence of syntax score and incomplete revascularization in CCS patients,” the researchers wrote.

“Incomplete revascularization is also related to a higher prevalence of MACE. As a result, CKD predicts incomplete revascularization and subsequent MACE in CCS patients,” they concluded.

Reference:

Farag, S. I., Mostafa, S. A., Kabil, H., & Elfaramawy, M. R. (2023). Chronic kidney disease’s impact on revascularization and subsequent major adverse cardiovascular events in patients with chronic coronary syndrome. Indian Heart Journal. https://doi.org/10.1016/j.ihj.2023.11.006

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IRF cyst localization within different retinal layers may impact outcome of AMD-related macular neovascularization

A recent retrospective case series study delved into the relationship between intraretinal fluid (IRF) localization within retinal layers and the 2-year prognosis for patients with neovascular age-related macular degeneration (AMD). The findings unveiled critical insights into the predictive value of IRF localization for the visual and anatomical outcomes in this cohort.

This study was published in the journal Ophthalmology Retina by Alessandro Arrigo and colleagues. The study involved 243 eyes of AMD patients affected by type 1 and type 2 macular neovascularization (MNV). Optical coherence tomography (OCT) imaging was utilized to classify MNV types, identify various fluid types, and determine IRF localization within retinal layers. A subset of eyes was further analyzed using OCT angiography. The study assessed the association between IRF cyst localization and visual outcomes, particularly the onset of outer retinal atrophy, over a 2-year period.

  • Neovascularizations Breakdown: Type 1 MNV constituted 69%, while type 2 MNV accounted for 31% of cases.

  • Treatment Metrics: Patients received a mean of 7 ± 2 intravitreal injections at the 1-year mark and 5 ± 2 injections at the 2-year follow-up.

  • Visual Acuity: Baseline best-corrected visual acuity improved significantly from 0.4 ± 0.3 to 0.3 ± 0.4 logarithm of the minimum angle of resolution at the 2-year follow-up (P < 0.01).

  • Outer Retinal Atrophy: Occurrence rates were 24% at 1 year and increased to 39% at the 2-year follow-up.

  • IRF Localization Impact: IRF localized at the IPL–INL and OPL–ONL retinal layers at baseline correlated with the poorest functional and anatomical outcomes.

  • Vascular Network Impact: Presence of IRF at baseline was linked to greater impairment of the intraretinal vascular network.

The study concluded that IRF localization at specific retinal layers, particularly IPL–INL and OPL–ONL, serves as a critical prognostic marker for the long-term morphologic and functional outcomes in neovascular AMD patients. This identification offers clinicians a valuable predictive tool for better patient management and treatment planning.

Reference:

Arrigo, A., Aragona, E., Bianco, L., Antropoli, A., Berni, A., Saladino, A., Cosi, V., Bandello, F., & Battaglia Parodi, M. The localization of intraretinal cysts has a clinical role on the 2-year outcome of neovascular age-related macular degeneration. Ophthalmology Retina,2023;7(12):1069–1079. https://doi.org/10.1016/j.oret.2023.07.025

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Iron deficiency may increase risk of severe HF and adverse events among children with dilated cardiomyopathy

Australia: A recent study published in The Journal of Heart and Lung Transplantation has revealed a high prevalence of iron deficiency (ID) in children with dilated cardiomyopathy (DCM).

The study showed that in clinical practice, iron studies are under-measured, but iron deficiency is associated with severe heart failure and an increased risk of composite adverse events (CAE). The researchers suggested considering the need for iron replacement therapy in children who present with heart failure with DCM.”

“The study is the largest to date to evaluate iron status in pediatric DCM,” the researchers reported. “Almost two-thirds of patients who had iron studies measured were iron deficient, and this conferred an increased risk of the composite occurrence of mechanical circulatory support (MCS), death, or transplantation over time.”

They added, “Those who were iron deficient had a longer hospital stay and were more likely to be microcytic, anaemic, and hypochromic, with a higher NT-proBNP.”

Jack C. Luxford from Children’s Hospital at Westmead, Sydney, Australia, and colleagues aimed to determine the prevalence and impact of iron deficiency in children with dilated cardiomyopathy by conducting a retrospective single-centre cohort study.

For this purpose, the researchers conducted a retrospective single-centre review of all children between 2010 and 2020 with a DCM diagnosis and complete iron studies. Iron deficiency was defined as ≥2 of ferritin <20 μg/litre, transferrin >3 g/liter, iron <9 μmol/litre, or transferrin saturation (TSat) <15%. Laboratory and clinical and freedom from a composite adverse event of MCS, death, or transplant were compared between children with and without ID.

The study led to the following findings:

  • Of 138 patients with DCM, 47 had available iron studies. 62% of patients were iron deficient.
  • Children with ID were more likely to be receiving inotropes (17, 59%) or invasive/noninvasive ventilation (13, 45%) than those who were iron-replete.
  • They had a higher incidence of anaemia (22, 76%) and higher NT-proBNP (1,590 pmol/litre).
  • Children with ID had significantly less freedom from the CAE at 1 year (54% ± 10%), 2 years (45 ± 10), and 5 years (37% ± 11%) than those without.
  • Iron deficiency and anaemia were the only significant predictors of the CAE on univariate Cox regression.

The findings revealed a high prevalence of ID in children with DCM.

“Iron studies are undermeasured in clinical practice, but ID is associated with severe heart failure and an increased CAE risk,” the researchers concluded. “The need for iron replacement therapy should be considered in children who present in HF with DCM.”

Reference:

Luxford, J. C., Casey, C. E., Roberts, P. A., & Irving, C. A. (2023). Iron deficiency and anemia in pediatric dilated cardiomyopathy are associated with clinical, biochemical, and hematological markers of severe disease and adverse outcomes. The Journal of Heart and Lung Transplantation. https://doi.org/10.1016/j.healun.2023.11.014

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Lowest and highest levels of fasting stress hyperglycemia may increase contrast-induced AKI among patients undergoing PCI

China: A recent study has revealed a significant association between both the highest and lowest levels of fasting stress hyperglycemia ratio (SHR) and an increased occurrence of contrast-induced acute kidney injury (CI-AKI) in patients undergoing coronary angiography (CAG) or percutaneous coronary intervention (PCI).

The findings published in Frontiers in Endocrinology showed that the correlation was observed regardless of whether the patients had diabetes or HbA1c > 6%.

Coronary artery disease (CAD) imposes a significant global disease burden and is a prominent contributor to human mortality on a global scale. Recently, there has been a significant improvement in the clinical prognosis of CAD patients with the widespread application of intervention techniques such as percutaneous coronary intervention and coronary angiography in the diagnosis and treatment of CAD. However, the use of these interventions is tied to a series of related complications that cannot be overlooked due to their effect on patient health.

Stress hyperglycemia ratio is an emerging indicator of critical illness, and exhibits a significant association with adverse cardiovascular outcomes. Yu Shan, Zhejiang University, Hangzhou, Zhejiang, China, and colleagues aimed to evaluate the association between fasting SHR and contrast-induced AKI in a cross-sectional study comprising 3,137 patients who underwent CAG or PCI.

Fasting SHR was calculated by dividing the admission of fasting blood glucose by the estimated mean glucose obtained from glycosylated haemoglobin. Contrast-induced acute kidney injury was evaluated based on elevated serum creatinine (Scr) levels.

The relationship between fasting SHR and the proportion of serum creatinine elevation was investigated using piecewise linear regression analysis. The correlation between fasting SHR and CI-AKI was evaluated through Modified Poisson’s regression analysis. Sensitivity analysis and subgroup analysis were conducted to explore result stability.

The researchers reported the following findings:

  • Among the total population, 15.4% of patients experienced CI-AKI.
  • Piecewise linear regression analysis revealed significant associations between the proportion of SCr elevation and fasting SHR on both sides (≤ 0.8 and > 0.8) [β = -12.651, β = 8.274].
  • The Modified Poisson’s regression analysis demonstrated a statistically significant correlation between both the lowest and highest levels of fasting SHR and an increased incidence of CI-AKI [(SHR < 0.7 versus 0.7 ≤ SHR < 0.9) β = 1.828 (SHR ≥ 1.3 versus 0.7 ≤ SHR < 0.9) β = 2.896], which was validated further through subgroup and sensitivity analyses.

“In populations undergoing PCI or CAG, both the lowest and highest levels of fasting SHR were significantly associated with an increased occurrence of CI-AKI,” the researchers concluded.

The researchers emphasized that this study solely encompassed the Chinese population, thus requiring further investigation to ascertain the generalizability of these findings to other populations in different countries.

Reference:

Shan, Y., Lin, M., Gu, F., Ying, S., Bao, X., Zhu, Q., Tao, Y., Chen, Z., Li, D., Zhang, W., Fu, G., & Wang, M. (2023). Association between fasting stress hyperglycemia ratio and contrast-induced acute kidney injury in coronary angiography patients: A cross-sectional study. Frontiers in Endocrinology, 14, 1300373. https://doi.org/10.3389/fendo.2023.1300373

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Mindfulness therapy reduces depression anxiety and increases sleep quality of university students

Anxiety and depression are the most common mental disorders, with a significant impact on work capability and performance. College students face stressors such as leaving home, assuming new responsibilities, and academic challenges, leading to increased stress and difficulty coping with stressors. As a result, many students sacrifice their sleep quality. Early psychological interventions can help prevent mental disorders, and the prevalence of mental health disorders varies widely among university students.

A study published in Frontiers in Public Health concluded that mindfulness therapy may reduce depression, anxiety, and stress in university students. Additionally, it may improve their sleep quality but not their mindfulness rating scores significantly. These findings emphasize mindfulness therapy’s effects on students’ moods.

This study estimated the effect of mindfulness therapy on mental health.

Two researchers conducted a meta-analysis of 12 databases to determine how mindfulness therapy impact depression. They searched relevant trials ( January 2018 to May 2023) and measured depression using different scales and scoring systems like Beck Depression Inventory (BDI), Patient Health Questionnaire-9 (PHQ-9), Quick Inventory of Depressive Symptomatology (QIDS), Patient-Reported Outcomes Measurement Information System (PROMIS), Hospital Anxiety and Depression Scale (HADS), and Depression Anxiety Stress Scales (DASS) and others. After screening, they included 11 randomized controlled trials involving 1,824 participants.

Key findings are:

  • Studies demonstrated positive effects of mindfulness therapy on depression, anxiety, stress and sleep quality with SMD,−0.33, −0.35, −0.39, and −0.81, respectively.
  • There was no significant difference in mindfulness between the mindfulness therapy and control groups, with an SMD of -0.12.

They added that future studies should evaluate the effectiveness of strategies to enhance mindfulness therapy adherence and fidelity in improving mental health outcomes.

It is crucial to develop a simple, economical, and effective intervention to address mental health issues among university students.

Study strengths include inclusion of studies from 12 global databases, representative sample, large sample size all of which lead to subgroup and sensitivity analysis.

Reference:

Zuo X et al.The efficacy of mindfulness-based interventions on mental health among university students: a systematic review and meta-analysis. Front Public Health. 2023 Nov 30;11:1259250. doi: 10.3389/fpubh.2023.1259250.

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JAMA: Increased Risk of Vitiligo Observed in Transplant Recipients

Vitiligo is characterized by the selective loss of melanocytes, but the large-scale studies assessing its occurrence in transplant recipients specially those with graft-vs-host disease (GVHD), have been rarely studied so far. In a recent cohort study by Chul Hwan Bang and colleagues, a significant correlation between solid organ and hematopoietic stem cell transplant (SOT and HSCT) recipients and an heightened risk of vitiligo was explored. The findings were published in JAMA Dermatology.

The study utilized data from the National Health Insurance Service database of Korea and included patients of 20 years or older. These participants underwent transplantation from January 2010 to December 2017, with follow-up until December 2019. A total of 119,145 individuals were grouped as age- and sex-matched controls who provided the benchmark for comparison.

The analysis was conducted from July to December 2021 revealed that the 23,829 transplant patients studied exhibited a higher risk of vitiligo compared to their non-transplant counterparts (adjusted hazard ratio [AHR] of 1.73; 95% CI, 1.35-2.22). Also, kidney and liver transplant recipients showed a slightly increased risk, but the most important findings were observed in HSCT recipients by indicating an AHR of 12.69 (95% CI, 5.11-31.50).

Further stratification revealed that those who had received allogeneic grafts, autologous grafts, patients with comorbid GVHD, and those without GVHD all demonstrated higher vitiligo risks compared to the control group.

The key findings of this research emphasize the imperative for clinicians to be cognizant of the increased risk of vitiligo in transplant recipients, specially in the context of HSCT, GVHD, and the type of graft received. This understanding urges a multidisciplinary approach in monitoring patients to bridge dermatology and transplantation medicine. With this outcome, clinicians can customize their strategies to offer more vigilant care to those at high risk, ultimately improving the management of transplant recipients.

Source:

Bang, C. H., Park, H. E., Kim, Y. H., Jung, J.-H., Lee, J. H., Park, Y. M., & Han, J. H. (2023). Risk of subsequent vitiligo in transplant recipients with comorbid graft-vs-host disease. JAMA Dermatology (Chicago, Ill.). https://doi.org/10.1001/jamadermatol.2023.4933

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Urethral stenosis post-radiation therapy has magnitude of side effects with poor patient reported QoL

Canada: A recent study published in Urology has shed light on health-related quality of life (QoL) in patients with urethral stenosis after radiation treatment for prostate cancer.

The researchers revealed urethral stenosis after radiotherapy to be a clinically complex entity with a broad scope of associated symptoms, including high rates of patient-reported incontinence, pain, sexual dysfunction, depression, and bowel dysfunction.

“This multi-focal nature combined with patient unawareness and often insidious presentation creates a uniquely challenging condition to treat,” the researchers wrote.

Patients with localized prostate cancer typically have a choice of curative options, either surgery (radical prostatectomy) or radiotherapy (external beam or brachytherapy). There is no clarity on which treatment provides superior outcomes for both preserved genitourinary (GU) function and cancer control.

Kennedy Dirk and Keith Rourke from the University of Alberta, Edmonton, Alberta, Canada, aimed to evaluate patient-reported QoL (PRQoL) in patients presenting with membranous urethral stenosis after prostate radiotherapy. Urethral stenosis is an under-reported complication following prostate radiotherapy with a particular deficiency in PRQoL.

For this purpose, the researchers retrospectively reviewed patients presenting with urethral stenosis after radiotherapy from 2004-2022. Patient-reported quality of life was evaluated via patient survey using the Expanded Prostate Cancer Index Composite for Clinical Practice (EPIC-CP). The researchers identified 230 patients at a mean age of 67.7 years and a mean time to stricture diagnosis of 63.6 months post-radiotherapy.

The study led to the following findings:

  • Of 87 patients completing the survey, 29.9% recalled being aware of urethral stenosis as a potential complication, and 51.7% had documentation of urethral stenosis as a potential complication.
  • 33.5% of patients underwent urethroplasty, 59.6% repeat endoscopic treatment and 6.1% an indwelling catheter. 64.4% of patients reported urinary dysfunction as a “moderate” or “big” problem, 66.7% reported frequent or total incontinence, 64.4% required daily pad use and 50.6% reported incontinence as either a “moderate” or “big” problem.
  • 85.0% reported poor or absent orgasmic dysfunction and 88.5% reported erections insufficient for sexual activity.
  • 47.1% of patients reported rectal pain and 31.0% reported dysuria.
  • Fatigue and depressive symptoms were reported by 60.9% and 41.4% of patients, respectively.

“The findings from this cohort of patients presenting with urethral stenosis after radiotherapy for localized prostate cancer showed the magnitude of side effects and global impact on PRQoL which has previously not been reported,” the researchers wrote.

“There is a broad scope of patient-reported symptoms spanning lower urinary tract symptoms, incontinence, bowel dysfunction, sexual dysfunction, and systemic effects,” they concluded.

Reference:

Dirk, K., & Rourke, K. (2023). Health-Related Quality of Life in Patients with Urethral Stenosis after Radiation Treatment for Prostate Cancer. Urology. https://doi.org/10.1016/j.urology.2023.10.041

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Women with history of bariatric surgery had lower pregnancy weight gain than matched controls: JAMA

In a groundbreaking nationwide study conducted in Sweden from 2014 to 2021, researchers delved into the intricate relationship between pregnancy weight gain and the history of bariatric surgery. The study found that women who underwent bariatric surgery had lower weight gain in pregnancy than women who did not undergo surgery. The study results were published in the journal JAMA Network Open. 

The increasing global prevalence of obesity in reproductive-age women poses maternal and fetal health risks. Bariatric surgery, notably gastric bypass and sleeve gastrectomy, is a primary treatment. Previous studies indicate reduced risks for certain complications, but concerns remain about postoperative pregnancy weight gain. This Swedish nationwide study aims to compare pregnancy weight gain among women with a history of bariatric surgery against those without. The investigation delves into potential variations based on surgical procedure, surgery-to-conception interval, and surgery-to-conception weight loss, addressing existing gaps in understanding.

The nationwide, population-based matched cohort study encompassing 12,776 pregnancies, aimed to shed light on how bariatric surgery influences pregnancy outcomes and whether factors such as surgical procedure, surgery-to-conception interval, and weight loss play crucial roles. This population-based study in Sweden (2014–2021) matched singleton pregnancies with a history of bariatric surgery to those without, employing a 1:1 propensity score matching based on various factors. Data analysis spanned from November 2022 to May 2023. The main outcome was to measure pregnancy weight gain was standardized by gestational age into early-pregnancy BMI-specific z scores.

Findings: 

  • The findings, unveiled through meticulous analysis, revealed a compelling connection between a woman’s history of bariatric surgery and her pregnancy weight gain. 
  • Notably, across all early-pregnancy BMI categories, women with a history of bariatric surgery exhibited lower pregnancy weight gain compared to their counterparts without such surgical history.
  • The study categorized BMI into normal weight, overweight, and various obesity classes, highlighting that the disparities in pregnancy weight gain were consistently evident.
  • One of the key revelations was that the choice of surgical procedure did not significantly alter the observed patterns of pregnancy weight gain. Whether individuals underwent gastric bypass or sleeve gastrectomy, the impact on pregnancy weight gain remained consistent. 
  • The study also explored the temporal aspect, investigating the influence of the surgery-to-conception interval. Intriguingly, a shorter surgery-to-conception interval, particularly within the first year, was associated with lower pregnancy weight gain. This temporal factor emerged as a crucial variable, suggesting that the timing of conception relative to bariatric surgery plays a pivotal role in shaping pregnancy outcomes.
  • Furthermore, the study highlighted the correlation between surgery-to-conception weight loss and pregnancy weight gain. Notably, a lower surgery-to-conception weight loss was linked to reduced pregnancy weight gain, contributing another layer to the intricate relationship between bariatric surgery history and maternal weight dynamics during pregnancy. 

In essence, this nationwide matched cohort study provides comprehensive insights into the nuanced association between bariatric surgery and pregnancy weight gain. The research not only challenges prevailing assumptions but also emphasizes the multifaceted nature of this relationship, encouraging a more nuanced approach to understanding the impact of bariatric surgery on pregnancy outcomes. As medical science continues to unravel the complexities of these interactions, this study marks a significant step forward in bridging gaps in knowledge and guiding future research and clinical practices.

Further reading: Xu H, Holowko N, Näslund I, et al. Pregnancy Weight Gain After Gastric Bypass or Sleeve Gastrectomy. JAMA Netw Open. 2023;6(12):e2346228. doi:10.1001/jamanetworkopen.2023.46228

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Higher Omega-3 levels intake may lower risk of total and ischemic stroke

A 2021 global study revealed that 1 in 4 adults will experience a stroke in their lifetime, making it the second-leading cause of death and third-leading cause of death and disability combined. Traditionally, diets low in sodium, saturated fat, and cholesterol (high-fibre diets) are the nutritional-based approach to preventing these conditions. Marine omega-3 PUFAs have also shown potential in preventing CVD.

According to a recent study published in STROKE, Higher omega-3 levels are linked to a lower risk of total and ischemic stroke; there is no association with hemorrhagic stroke.

The effect of marine omega-3 PUFAs on the risk of stroke remains unclear. This study investigated the associations between circulating and tissue omega-3 PUFA levels and incident stroke (total, ischemic, and hemorrhagic). The study design included 29 international prospective cohorts with 183,291 participants. Each site conducted de novo individual-level analyses. Harmonized data is centrally pooled and analyzed.

Key findings from the study are:

  • Out of 183,291 participants, 10,561 strokes were observed, including 8,220 ischemic and 1,142 hemorrhagic strokes, during a median follow-up of 14.3 years.
  • For eicosapentaenoic acid, comparing quintile 5 with quintile 1, total stroke incidence was 17% lower and ischemic stroke was 18% lower with HR 0.83 and 0.82, respectively.
  • For docosahexaenoic acid, comparing Q5 with Q1, there was a 12% lower incidence of total stroke and a 14% lower incidence of ischemic stroke with HR, 0.88 and 0.86, respectively.
  • Neither eicosapentaenoic acid nor docosahexaenoic acid was associated with a risk for hemorrhagic stroke.
  • These associations were not modified by baseline AF history or prevalent CVD.

James H. O’Keefe said This analysis of prospective studies found that long-chain omega-3 PUFA levels were inversely associated with f total and ischemic stroke risk, but not with hemorrhagic stroke risk. Therefore, higher DHA and EPA intakes may lower the stroke risk.

Reference:

O’Keefe et al. Omega-3 blood levels and stroke risk: A pooled and harmonized analysis of 183 291 participants from 29 prospective studies. Stroke, 55(1), 50–58. https://doi.org/10.1161/strokeaha.123.044281

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Maternal folic acid supplementation during pregnancy tied to reduced Kawasaki disease risk during infancy in offspring: JAMA

Japan: A recent study published in JAMA Network Open has suggested a reduced risk of Kawasaki disease (KD) during infancy among offspring with increasing maternal folic acid levels via maternal folic acid supplementation during pregnancy.

The Japanese nationwide birth cohort study of 87,702 children revealed that the frequency of maternal folic acid supplementation and maternal serum folic acid levels during pregnancy were significantly associated with a reduced risk of Kawasaki disease in offspring during infancy.

Kawasaki disease is an acute systemic vasculitis that majorly affects young children and infants. A previous study has reported a possible association between maternal folic acid supplementation and Kawasaki disease, but no reproducible risk factors have been identified yet. Sayaka Fukuda, Yokohama City University, Yokohama, Japan, and colleagues investigate the associations of exposure to maternal serum folic acid levels and maternal folic acid supplementation with the onset of KD during infancy among offspring.

In the cohort study, the researchers used data from a nationwide birth cohort, the Japan Environment and Children’s Study, which enrolled children since 2011.

Maternal serum folic acid levels (≥10 ng/mL classified as exposed) were determined during the second and third trimesters and the frequency of maternal folic acid supplementation during the first trimester and during the pregnancy’s second and third trimesters (once a week or more was classified as exposed).

The primary outcome of the study was the onset of Kawasaki disease in offspring up to 12 months of age. Odds ratios (ORs) for each exposure were estimated, and propensity score–adjusted logistic regression was conducted based on the sets of variables.

Based on the study, the researchers reported the following findings:

  • The study population consisted of 87,702 children who were followed up for 12 months. Of these, 336 children developed Kawasaki disease.
  • Mothers who took folic acid supplements (35.7% of mothers; mean age, 32 years) had higher serum folic acid levels than those who did not take supplements.
  • Higher maternal serum folic acid levels were associated with a significantly lower risk of Kawasaki disease in offspring than lower levels (folic acid ≥10 vs <10 ng/mL, 0.27% children vs 0.41% children; OR, 0.68).
  • Children whose mothers took folic acid supplementation during the first trimester had a lower prevalence of Kawasaki disease than children whose mothers did not take folic acid (0.34% of children versus 0.42% of children), although the difference was not statistically significant (OR, 0.83).
  • Supplementation during the second and third trimesters was associated with a significantly lower risk of Kawasaki disease compared with no supplementation (94 of 0.30% children versus 0.43% children; OR, 0.73).

“Findings showed that higher serum folic acid levels (≥10 ng/mL) and maternal folic acid supplementation more than once a week during the second and third trimesters were tied to a reduced risk of Kawasaki disease in offspring during infancy” they concluded.

Reference:

Fukuda S, Tanaka S, Kawakami C, Kobayashi T, Ito S, Japan Environment and Children’s Study Group. Maternal Serum Folic Acid Levels and Onset of Kawasaki Disease in Offspring During Infancy. JAMA Netw Open. 2023;6(12):e2349942. doi:10.1001/jamanetworkopen.2023.49942

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