scholarly journals Iron Deficiency and Nonscarring Alopecia in Women: Systematic Review and Meta-Analysis

2021 ◽  
pp. 1-10
Author(s):  
Yulia Treister-Goltzman ◽  
Shaked Yarza ◽  
Roni Peleg
Keyword(s):  
Systematic Review ◽  
Iron Deficiency ◽  
Random Effects ◽  
Hair Loss ◽  
Web Of Science ◽  
Medical Literature ◽  
Meta Analysis ◽  
Clear Cut

<b><i>Background:</i></b> There is no clear-cut evidence in the existing medical literature of an association between iron deficiency and nonscarring alopecia. <b><i>Objective:</i></b> The objective of the study was to conduct a systematic review of the medical literature on the prevalence of iron deficiency in women with nonscarring alopecia and compare their ferritin levels with those of women without this condition. <b><i>Methods:</i></b> The electronic databases PubMed, Scopus, and Web of Science were searched between June 15, 2019, and July 24, 2019. Studies that evaluated the prevalence of iron deficiency in women with nonscarring alopecia and/or compared ferritin levels in women with and without this condition were entered into the meta-analysis. Thirty-six of 928 identified studies entered the systematic meta-analysis. The meta-analysis was performed using the random-effects method. <b><i>Results:</i></b> The overall number of participants was 10,029. The prevalence of ferritin levels from 10 to 15 ng/dL and below was 21% (12; 29). Women with nonscarring alopecia had lower ferritin values at MD = −18.51 ng/dL (−25.85; −11.16, <i>p</i> &#x3c; 0.01). <b><i>Conclusion:</i></b> Women with hair loss can benefit from higher ferritin levels.

scholarly journals The Association between Season and Hypertensive Disorders of Pregnancy: A Systematic Review and Meta-Analysis

2021 ◽  
Author(s):  
Lingyun Liao ◽  
Xiaohong Wei ◽  
Min Liu ◽  
Yijie Gao ◽  
Yangxue Yin ◽  
...  
Keyword(s):  
Systematic Review ◽  
Quantitative Analysis ◽  
Random Effects ◽  
Web Of Science ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Random Effects Model ◽  
Hypertensive Disorders Of Pregnancy ◽  
Hypertensive Disorders ◽  
The Cochrane Library

Abstract Background: There is increasing and inconsistent evidence of a relationship between hypertensive disorders of pregnancy (HDP) and season of delivery or conception.Methods: Four databases, the Cochrane Library, PubMed, EMBASE and Web of Science, were searched until September 29th, 2021. Two authors extracted data independently. A random effects model and the Mantel-Haenszel method were used to calculate pooled ORs and 95% CIs.Results: Twenty articles were included in the systematic review, and 11 articles were included in the meta-analysis. The quantitative analysis of the association between delivery season and HDP showed that the odds of HDP was higher in women who deliver in winter than in those who delivered in summer (OR=1.18, 95% CI 1.02-1.38, p < 0.001) and all other seasons (OR = 1.17, 95% CI 1.03-1.34, p <0.001). In the qualitative analysis of the association between conception season and HDP, 4 of 7 studies suggested that women who conceived in summer had a higher risk of HDP than those who conceived in other seasons.Conclusions: Based on the evidence to date, we found weakly positive relationships between HDP and summer conception and winter delivery.

scholarly journals The frequency of uveitis in patients with adult versus childhood spondyloarthritis

RMD Open ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. e001196
Author(s):  
Matthew Turk ◽  
Jacqueline Hayworth ◽  
Tatiana Nevskaya ◽  
Janet Pope
Keyword(s):  
Systematic Review ◽  
Random Effects ◽  
Web Of Science ◽  
Meta Analysis ◽  
Ocular Involvement ◽  
Random Effects Model ◽  
Adult Onset ◽  
Review Of The Literature ◽  
Inclusion Criteria ◽  
Random Effects Models

ObjectivesThis meta-analysis investigated the frequency of ocular involvement in childhood and adult spondyloarthritis (SpA).MethodsA systematic review of the literature was conducted. Medline, Web of Science and Cochrane databases were searched upto October 2018 identifying publications related to SpA, including ankylosing spondylitis (AS) with ocular conditions (OC) (uveitis, iritis, retinitis, chorioretinitis and other ocular involvement). The rates of OC were extracted and random effects models estimated their frequency. Heterogeneity was evaluated using I2. Inclusion criteria were studies in SpA of either children or adults who included a frequency of OC.Results3164 studies were identified, and 41 analysed which included frequencies of uveitis/iritis. Other OC were too infrequent to analyse. A pooled random effects model showed that the prevalence of uveitis was 24% in adult AS (23 studies, 11 943 patients), 10% in adult psoriatic arthritis (PsA) (9 studies, 1817) and 17% in undifferentiated adult SpA (9 studies, 6568 patients). In juveniles with AS, the prevalence of uveitis was 27% (8 studies, 927 patients), in juvenile PsA it was 16% (5 studies, N=498) and in juvenile undifferentiated SpA, uveitis occurred in 7% (2 studies, 1531 patients). In all evaluated SpA subgroups, there were no statistical differences in the frequency of uveitis between juveniles and adults.ConclusionsUveitis in adult versus child-onset SpA is similar in AS but more common in adult-onset undifferentiated SpA, and less frequent in adult-onset PsA compared to child-onset PsA, but the differences were not significant.

scholarly journals Systematic review and meta-analysis of the effect of iron-fortified flour on iron status of populations worldwide

2019 ◽  
Vol 22 (18) ◽  
pp. 3465-3484 ◽  
Author(s):  
Jila Sadighi ◽  
Saharnaz Nedjat ◽  
Rahele Rostami
Keyword(s):  
Systematic Review ◽  
Iron Deficiency ◽  
Haemoglobin Level ◽  
Random Effects ◽  
Iron Status ◽  
Ferritin Level ◽  
Meta Analysis ◽  
Health Strategy ◽  
Level 3 ◽  
Fortified Flour

AbstractObjective:Assess the effectiveness of iron-fortified flour on iron status.Design:Systematic review and meta-analysis.Setting:Argentina, Australia, Azerbaijan, Bangladesh, Brazil, Cameroon, Chile, China, Costa Rica, Côte d’Ivoire, Denmark, India, Iran, Jordan, Kazakhstan, Kenya, Kuwait, Mongolia, Morocco, Norway, South Africa, Sri Lanka, Tajikistan, Thailand, UK, USA, Uzbekistan, Venezuela, Vietnam, and Zambia.Participants:Fifty-two articles (ninety-four trials) were examined. The main target groups were women, children, and infants/toddlers. The effects of different types of iron-fortified flour (wheat, maize, rice, soy, and beans) on iron status were examined.Results:A random effects analysis of before–after studies showed that iron-fortified flour led to significant increases of mean haemoglobin level (3·360 g/l; 95 % CI: 0·980, 5·730) and mean serum ferritin level (4·518 µg/l; 95 % CI: 2·367, 6·669); significant decreases of anaemia (−6·7 %; 95 % CI: −9·8 %, −3·6 %) and iron deficiency (ID) (−10·4 %; 95 % CI: −14·3 %, −6·5 %); but had no significant effect on iron deficiency anaemia (IDA). A random effects analysis of controlled trials indicated that iron-fortified flour led to significant increases of mean haemoglobin level (2·630 g/l; 95 % CI: 1·310, 3·950) and mean ferritin level (8·544 µg/l; 95 % CI: 6·767, 10·320); and significant decreases of anaemia (−8·1 %; 95 % CI: −11·7 %, −4·4 %), ID (−12·0 %; 95 % CI: −18·9 %, −5·1 %), and IDA (−20·9 %; 95 % CI: −38·4 %, −3·4 %).Conclusions:Flour fortification with iron is an effective public health strategy that improves iron status of populations worldwide.

scholarly journals Effectiveness of iron polymaltose complex in treatment and prevention of iron deficiency anemia in children: a systematic review and meta-analysis

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e10527
Author(s):  
Ritzzaleena Rosli Mohd Rosli ◽  
Mohd Noor Norhayati ◽  
Shaiful Bahari Ismail
Keyword(s):  
Systematic Review ◽  
Side Effects ◽  
Iron Deficiency ◽  
Random Effects ◽  
Iron Deficiency Anemia ◽  
Meta Analysis ◽  
The Body ◽  
Deficiency Anemia ◽  
Cochrane Central Register ◽  
Treatment And Prevention

Background Iron deficiency anemia (IDA) is commonly treated with iron formulations. Despite the expanding acceptance of iron polymaltose complex (IPC) among clinicians, there is sparse and contradictory evidence regarding its efficacy in the management of IDA in children. This systematic review and meta-analysis aimed to assess the effectiveness of IPC in the treatment and prevention of IDA in children. Methods We searched the Cochrane Central Register of Controlled Trials, MEDLINE and Epistemonikos for all randomized control trials (RCTs) comparing oral IPC with standard oral iron supplementation for the treatment or prevention of IDA in children. We independently screened the titles and abstracts of identified trials before the full text of relevant trials was evaluated for eligibility. We then independently extracted data on the methods, interventions, outcomes, and risk of bias from the included trials. A random-effects model was used to estimate the risk ratios and mean differences with 95% confidence intervals. Results Eight trials comprising 493 randomized patients were included and analyzed using three comparison groups. The comparison group of which was used to evaluate IPC and ferrous sulphate (FS) for treatment of IDA showed that IPC is less effective in increasing Hb (MD −0.81, 95% CI −1.08 to −0.53; I2 = 48%, P < 0.001; six studies, 368 participants; high certainty of evidence), ferritin (MD −21.24, 95% CI −39.26 to −3.23, random-effects; I2 = 65%, P = 0.020; 3 studies, 183 participants; moderate certainty of evidence) and MCV levels (MD −3.20, 95% CI −5.35 to −1.05; P = 0.003; one study, 103 participants; low certainty of evidence). There was no difference in the occurrence of side effects between IPC and FS group (MD 0.78, 95% CI 0.47 to 1.31; I2 = 4%, P = 0.35; three studies, 274 participants; high certainty of evidence). Conclusions There was moderate to high certainty evidence that FS is superior to IPC with a clinically meaningful difference in improving the Hb and ferritin levels in the treatment of IDA in children. There was no difference in the occurrence of gastrointestinal side effects with high certainty evidence between the IPC and FS groups. The body of evidence did not allow a clear conclusion regarding the effectiveness of IPC with iron gluconate and iron bisglycinate in the prevention and treatment of IDA. The certainty of evidence was low. Adequately powered and high-quality trials with large sample sizes that assess both hematological and clinical outcomes are required. PROSPERO registration number: CRD42019145020

scholarly journals Evaluation of SARS-CoV-2 clearance period in patients with COVID-19: a systematic review and meta-analysis

2020 ◽  
Author(s):  
Yasutaka Okita ◽  
Takayoshi Morita ◽  
Atsushi Kumanogoh
Keyword(s):  
Systematic Review ◽  
Random Effects ◽  
Selection Criteria ◽  
Web Of Science ◽  
Meta Analysis ◽  
Random Effects Model ◽  
Viral Shedding ◽  
The Mean

Abstract Background: There is insufficient consensus on the viral shedding period in each background of patients with coronavirus disease 2019 (COVID-19).Methods: We conducted a comprehensive systematic review and meta-analysis according to the PRISMA guidelines. PubMed and Web of Science were searched for original studies reporting the viral shedding period in patients with COVID-19. A random effects model was used to calculate the mean number of days from the onset. Subanalysis was performed focusing on age, sex, severity, locality, and treatment.Results Of 55 studies identified, 12 met the selection criteria. The viral shedding period tended to be longer in sputum (19.03 days) than in nasopharynx (14.58 days). The viral shedding period in nasopharynx tended to be longer in severe patients (23.65 days) than in nonsevere patients (12.67 days). It also tended to be longer in patients treated with steroid (21.24 days) than in patients treated without steroid (12.20 days). This period tended to be longer in Asia (16.07 days) than in Europe (12.57 days). Age, sex, and anti-viral drugs did not affect the viral shedding period.Conclusions Severity, steroid usage, and locality may affect the viral shedding period.

scholarly journals Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis

2021 ◽  
Author(s):  
Wen Zhang ◽  
◽  
Meiling Fan ◽  
Cunchuan Wang ◽  
Kamal Mahawar ◽  
...  
Keyword(s):  
Systematic Review ◽  
Bariatric Surgery ◽  
Folic Acid ◽  
Hair Loss ◽  
Meta Analysis ◽  
Serum Zinc ◽  
Serum Levels ◽  
Mean Difference ◽  
Younger Women ◽  
Metabolic And Bariatric Surgery

Abstract Background Hair loss is a common complication after metabolic and bariatric surgery (MBS). There is a lack of published systematic review in the scientific literature on this topic. The aim of this study was to perform a systematic review and meta-analysis on hair loss after MBS in accordance with Preferred Reporting Items for Systematic reviews and Meta-Analysis (PRISMA) guidelines. Methods PubMed, CINAHL, EMBASE, Web of Science, SCOPUS, and four Chinese databases were searched. Data were pooled using Review Manager 5.3 and Stata 12.0, and subgroups were performed if necessary and feasible. Results A total of 18 studies (n = 2538) were included. The pooled results showed that the incidence of hair loss after MBS was 57% (95% CI 42–71%). It decreased with longer follow-up times. Hair loss was significantly more common in younger (mean difference (MD), − 2.45; 95% CI, − 4.26 to − 0.64; p = 0.008) women (OR, 3.87; 95% CI, 0.59 to 17.59; p = 0.08). Serum zinc (standardized mean difference (SMD), − 1.13; 95% CI, − 2.27 to 0.01, p = 0.05), folic acid (SMD = − 0.88, 95% CI − 1.29 to − 0.46, p < 0.0001), and ferritin levels (SMD, − 0.22; 95% CI, − 0.38 to − 0.05; p = 0.01), but not serum iron and vitamin B12, were associated with hair loss following MBS. Conclusions Hair loss is common after MBS especially in younger women, and those with low serum levels of zinc, folic acid, and ferritin. Prospective studies on larger cohorts are needed.

scholarly journals Caffeine and Cognitive Functions in Sports: A Systematic Review and Meta-Analysis

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 868
Author(s):  
Jorge Lorenzo Calvo ◽  
Xueyin Fei ◽  
Raúl Domínguez ◽  
Helios Pareja-Galeano
Keyword(s):  
Systematic Review ◽  
Reaction Time ◽  
Cognitive Performance ◽  
Cognitive Functions ◽  
Web Of Science ◽  
Meta Analysis ◽  
Caffeine Intake ◽  
Inclusion Criteria ◽  
Research Protocols ◽  
The Relationship

Cognitive functions are essential in any form of exercise. Recently, interest has mounted in addressing the relationship between caffeine intake and cognitive performance during sports practice. This review examines this relationship through a structured search of the databases Medline/PubMed and Web of Science for relevant articles published in English from August 1999 to March 2020. The study followed PRISMA guidelines. Inclusion criteria were defined according to the PICOS model. The identified records reported on randomized cross-over studies in which caffeine intake (as drinks, capsules, energy bars, or gum) was compared to an identical placebo situation. There were no filters on participants’ training level, gender, or age. For the systematic review, 13 studies examining the impacts of caffeine on objective measures of cognitive performance or self-reported cognitive performance were selected. Five of these studies were also subjected to meta-analysis. After pooling data in the meta-analysis, the significant impacts of caffeine only emerged on attention, accuracy, and speed. The results of the 13 studies, nevertheless, suggest that the intake of a low/moderate dose of caffeine before and/or during exercise can improve self-reported energy, mood, and cognitive functions, such as attention; it may also improve simple reaction time, choice reaction time, memory, or fatigue, however, this may depend on the research protocols.

A preliminary systematic review and meta-analysis on the effects of heart rate variability biofeedback on heart rate variability and respiration of athletes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jeffrey Cayaban Pagaduan ◽  
Yung-Sheng Chen ◽  
James William Fell ◽  
Sam Shi Xuan Wu
Keyword(s):  
Systematic Review ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Web Of Science ◽  
Meta Analysis ◽  
Academic Research ◽  
Experimental Studies ◽  
Quantitative Review ◽  
Heart Rate Variability Biofeedback ◽  
Randomized Control

Abstract To date, there is no quantitative review examining the influence of heart rate variability biofeedback (HRV BFB) on the athlete population. Such an undertaking may provide valuable information on the autonomic and respiration responses of athletes when performing HRV BFB. Thus, purpose of this preliminary systematic review and meta-analysis on the effects of HRV BFB on HRV and respiration of athletes. Searches of Springerlink, SportDiscus, Web of Science, PROQUEST Academic Research Library, Google Scholar, and ScienceDirect were conducted for studies that met the following criteria: (1) experimental studies involving athletes that underwent randomized control trial; (2) availability of HRV BFB as a treatment compared with a control (CON)/placebo (PLA); (3) any pre and post HRV variable and/or breathing frequency as dependent variable/s; and, (4) peer-reviewed articles written in English. Four out of 660 studies involving 115 athletes (25 females and 90 males) ages 16–30 years old were assessed in this review. Preliminary findings suggest the promising ability of HRV BFB to improve respiratory mechanics in athlete population. More work is needed to determine the autonomic modulatory effect of HRV BFB in athletes.

scholarly journals Incidence of Herpes Zoster in HIV-Infected Patients Undergoing Antiretroviral Therapy: A Systematic Review and Meta-analysis

2021 ◽  
Vol 10 (11) ◽  
pp. 2300
Author(s):  
Han-Chang Ku ◽  
Yi-Tseng Tsai ◽  
Sriyani-Padmalatha Konara-Mudiyanselage ◽  
Yi-Lin Wu ◽  
Tsung Yu ◽  
...  
Keyword(s):  
Systematic Review ◽  
Herpes Zoster ◽  
Antiretroviral Therapy ◽  
Random Effects ◽  
Meta Analysis ◽  
People Living With Hiv ◽  
Funnel Plots ◽  
Sex With Men ◽  
Treat All ◽  
Living With Hiv

The incidence of herpes zoster (HZ) in patients infected with HIV is higher than that of the general population. However, the incidence of HZ in HIV patients receiving antiretroviral therapy (ART) remains unclear. This meta-analysis aimed to estimate the pooled incidence rate and risk factors for HZ in the post-ART era. We identified studies assessing the incidence of HZ in the post-ART era between 1 January 2000 and 28 February 2021, from four databases. Pooled risk ratios were calculated from 11 articles using a random-effects model. The heterogeneity of the included trials was evaluated by visually inspecting funnel plots, performing random-effects meta-regression and using I2 statistics. Of the 2111 studies screened, we identified 11 studies that were eligible for final inclusion in the systematic review and 8 studies that were eligible for a meta-analysis. The pooled incidence of HZ in the post-ART era (after the introduction of ART in 1997) was 2.30 (95% confidence interval (CI): 1.56–3.05) per 100 person years (PYs). The risks of incidence of HZ among people living with HIV included male sex (AOR: 4.35 (95% CI: 054–2.41)), men who have sex with men (AOR: 1.21 (95% CI: −0.76–1.13)), CD4 count < 200 cells/μL (AOR: 11.59 (95% CI: 0.53–4.38)) and not receiving ART (AOR: 2.89 (95% CI: −0.44–2.56)). The incidence of HZ is substantially lower among HIV infected patients receiving ART than those not receiving ART. Initiating ART immediately after diagnosis to treat all HIV-positive individuals is crucial to minimize the disease burden of HZ.

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