Chinese Medicinal Herbs for Childhood Pneumonia: A Systematic Review of Effectiveness and Safety

Objective. To assess the efficacy and safety of Chinese medicinal herbs for Childhood Pneumonia.Methods. We included randomized controlled trials (RCTs). The searched electronic databases included PubMed, the Cochrane Central Register of Controlled Trials, EMBASE, CBM, CNKI, and VIP. All studies included were assessed for quality and risk bias. Review Manager 5.1.6 software was used for data analyses, and the GRADEprofiler software was applied to classify the systematic review results.Results. Fourteen studies were identified(n=1.824). Chinese herbs may increase total effective rate (risk ratio (RR) 1.18; 95% confidence interval (CI), 1.11–1.26) and improve cough (total mean difference (MD),−2.18; 95% CI,(−2.66)–(−1.71)), fever (total MD,−1.85; 95% CI,(−2.29)–(−1.40)), rales (total MD,−1.53; 95% CI,(−1.84)–(−1.23)), and chest films (total MD,−3.10; 95% CI,(−4.11)–(−2.08)) in Childhood Pneumonia. Chinese herbs may shorten the length of hospital stay (total MD,−3.00; 95% CI, (−3.52)–(−2.48)), but no significant difference for adverse effects (RR, 0.39; 95% CI, 0.09–1.72) was identified.Conclusion. Chinese herbs may increase total effective rate and improve symptoms and signs. However, large, properly randomized, placebo-controlled, double-blind studies are required.

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Chinese Medicinal Herbs in the Treatment of Diabetic Cognitive Impairment: A Systematic Review and Meta-Analysis

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2018/7541406 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10

Author(s):

Bin Yan ◽

Jingbo Wang ◽

Zhigang Xue ◽

Guoqing Tian

Keyword(s):

Cognitive Impairment ◽

Randomized Controlled Trials ◽

Meta Analysis ◽

Memory Function ◽

Effective Rate ◽

Medicinal Herbs ◽

Controlled Trials ◽

Chinese Medicinal Herbs ◽

Randomized Controlled ◽

Significant Difference

Background. Diabetic cognitive impairment (DCI), a serious complication of diabetes mellitus (DM), is gaining more acceptance and attention. The learning and memory function of diabetics always decreases. Traditional Chinese medicine (TCM) has been demonstrated to be effective in treating the symptoms in China, and thereinto Chinese medicinal herbs (CMH) are the most widely used. The objective of the present study was to review and analyze the existing data about reducing the symptoms in CMH treatment for DCI. Methods. Electronic literature databases (PubMed, EMBASE, CNKI, SinoMed, and Wan fang) were searched for randomized controlled trials conducted in China, comparing CMH with western medicines in the treatment of DCI, up to April 1, 2018. We applied standard meta-analytic techniques to analyze data from papers that reached acceptable criteria. Result. Nine randomized controlled trials (n = 576) on CMH were included. We found moderate evidence that CMH used alone or in combination with western medicines was more effective than western medicines alone in reliving the symptoms for DCI (total effective rate, odds radio (OR) = 4.64 (2.60, 8.29), and 95% confidence interval, P<0.00001). Besides, CMH along or in combination with western medicines showed more beneficial effects on Montreal Cognitive Assessment (MoCA) scale (mean difference (MD) = 1.31(0.75, 1.87), P<0.00001), Mini-Mental State Examination (MMSE) scale (MD = 2.07 (0.86, 3.28), P<0.00001, and TCM symptom score (TCMSS) (MD = -4.89 (-8.44, -1.34), P = 0.007). Most of the included studies showed that there was not a significant difference in the adverse events. Conclusions. These findings demonstrated that CMH used alone or in combination with western medicines were apparently better than western medicines alone in the treatment of DCI. Because of the poor quality of the studies that were available for the present meta-analysis, further researches are still needed to support these early findings.

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Azithromycin in patients with Covid-19; a systematic review and metanalysis

10.1101/2021.08.03.21261414 ◽

2021 ◽

Author(s):

Luis Ayerbe ◽

Ivo Forgnone ◽

Carlos Risco-Risco ◽

Maria Perez-Pinar ◽

Salma Ayis

Keyword(s):

Systematic Review ◽

Clinical Severity ◽

Future Research ◽

Controlled Trials ◽

Clinical Settings ◽

Cochrane Central Register ◽

Random Effects Models ◽

Central Register ◽

Significant Difference ◽

Observational Design

Background: Azithromycin (AZM) has been widely used in the management of Covid-19. However, the evidence on its actual effects remains disperse and difficult to apply in clinical settings. This systematic review and metanalysis summarizes the studies on the beneficial and adverse effect of AZM in patients with Covid-19. Methods: The PRISMA 2020 statement criteria were followed. Randomized controlled trials (RCTs) and observational studies comparing clinical outcomes of patients treated, and not treated, with AZM, indexed until the 5th of July 2021, were searched in PubMed, Embase, The Web of Science, Scopus, The Cochrane Central Register of Controlled Trials, and MedRXivs. We used Random-effects models to estimate pooled effect size from aggregate data. Results: The initial search produced 4950 results. Finally, 16 studies, five RCTs and 11 with an observational design, with a total of 22984 patients, were included. The metanalysis showed no difference in mortality for those treated, or not, with AZM, OR: 0.95 (0.79-1.13). There was also no significant difference for those treated, and not, with AZM in need for hospital admission or time to admission from ambulatory settings, clinical severity, need for intensive care, or adverse effects. Conclusions: These results presented in this review do not support the use of AZM in the management of Covid-19. They also show that any harm caused to the patient who received it is unlikely. Future research on treatment for patients with Covid-19 may need to focus on other drugs

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Are Kidney-Tonifying and Blood-Activating Medicinal Herbs Better than NSAIDs for Knee Osteoarthritis? A Systematic Review and Meta-Analysis

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2019/9094515 ◽

2019 ◽

Vol 2019 ◽

pp. 1-19

Author(s):

Hetao Huang ◽

Jianke Pan ◽

Weiyi Yang ◽

Yanhong Han ◽

Minghui Luo ◽

...

Keyword(s):

Systematic Review ◽

Adverse Reaction ◽

Knee Osteoarthritis ◽

Reaction Rate ◽

Total Effective Rate ◽

Meta Analysis ◽

Effective Rate ◽

Medicinal Herbs ◽

Vas Scores ◽

Quality Evidence

Objective. To compare the efficacy and safety of kidney-tonifying and blood-activating medicinal herbs (KTBAMs) and nonsteroidal anti-inflammatory drugs (NSAIDs) in the treatment of knee osteoarthritis (KOA). Methods. Randomized controlled trials (RCTs) from online databases that compared the efficacy of KTBAMs and NSAIDs in the treatment of KOA were retrieved. The main outcomes included the evaluation of functional outcomes, pain, and adverse effects. The Cochrane risk-of-bias (ROB) tool was used to assess methodological quality. Results. A total of 38 RCTs (3994 participants) were included in our meta-analysis. We found that KTBAMs had a significantly higher total effective rate (P<0.00001, risk ratio (RR) = 1.08, confidence interval (CI) = 1.05 to 1.11, I2 = 4%) and a lower gastrointestinal adverse reaction rate (P<0.00001, RR = 0.36, CI = 0.24 to 0.53, I2 = 33%) than NSAIDs. KTBAMs showed greater improvements in the Knee Society Scale (KSS) scores (mean difference (MD) = 7.17, 95% CI 0.71 to 13.64, P=0.03). Regarding the visual analog scale (VAS) scores, WOMAC scores, and Lequence scores, there were no significant differences between the KTBAM group and the NSAID group. The GRADE quality level of this systematic review indicated that the very low-quality evidence showed that KTBAMs had a higher total effective rate, while the moderate-quality evidence showed that the adverse reactions of KTBAMs were lower and the KSS scores were higher. Low-quality evidence showed no significant differences in improving VAS scores, WOMAC scores, or Lequence scores. Conclusion. KTBAMs were superior to NSAIDs in terms of a higher total effective rate, a lower adverse reaction rate, and a higher KSS score. There were no significant differences between KTBAMs and NSAIDs in improving VAS scores, WOMAC scores, and Lequence scores of patients with KOA. Therefore, KTBAMs may be an alternative effective method for treating KOA. However, high-quality, well-designed RCTs with long-term follow-up are still required.

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Use of Prophylaxis for Prevention of Venous Thromboembolism in Patients with Isolated Foot or Ankle Surgery: A Systematic Review and Meta-Analysis

Thrombosis and Haemostasis ◽

10.1055/s-0039-1693464 ◽

2019 ◽

Vol 119 (10) ◽

pp. 1686-1694 ◽

Cited By ~ 1

Author(s):

Bavand Bikdeli ◽

Renuka Visvanathan ◽

David Jimenez ◽

Manuel Monreal ◽

Samuel Z. Goldhaber ◽

...

Keyword(s):

Systematic Review ◽

Venous Thromboembolism ◽

Meta Analysis ◽

Evidence Base ◽

Controlled Trials ◽

Cochrane Central Register ◽

Foot And Ankle ◽

Vte Prophylaxis ◽

Ankle Surgery ◽

Significant Difference

AbstractAlthough prophylaxis for venous thromboembolism (VTE) is recommended after many surgeries, evidence base for use of VTE prophylaxis after foot or ankle surgery has been elusive, leading into varying guidelines recommendations and notable practice variations. We conducted a systematic review of the literature to determine if use of VTE prophylaxis decreased the frequency of subsequent VTE, including deep vein thrombosis (DVT) or pulmonary embolism (PE), compared with control. We searched PubMed, the Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov through May 2018, for randomized controlled trials (RCTs) or prospective controlled observational studies of VTE prophylaxis in patients undergoing foot and ankle surgery. Our search retrieved 263 studies, of which 6 were finally included comprising 1,600 patients. Patients receiving VTE prophylaxis had lower risk for subsequent DVT (risk ratio [RR]: 0.72; 95% confidence interval [CI]: 0.55–0.94) and subsequent VTE (RR: 0.72; 95% CI: 0.55–0.94). There was only one case of nonfatal PE, no cases of fatal PE, and no change in all-cause mortality (RR: 3.51; 95% CI: 0.14–84.84). There was no significant difference in the risk for bleeding (RR: 2.12; 95% CI: 0.53–8.56). Very few RCTs exist regarding the efficacy and safety of VTE prophylaxis in foot and ankle surgery. Prophylaxis appears to reduce the risk of subsequent VTE, but the event rates are low and symptomatic events are rare. Future studies should determine the subgroups of patients undergoing foot or ankle surgery in whom prophylaxis may be most useful.

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Blinding integrity in randomized sham-controlled trials of repetitive transcranial magnetic stimulation for major depression: a systematic review and meta-analysis

The International Journal of Neuropsychopharmacology ◽

10.1017/s1461145712001691 ◽

2013 ◽

Vol 16 (5) ◽

pp. 1173-1181 ◽

Cited By ~ 30

Author(s):

Marcelo T. Berlim ◽

Hannah J. Broadbent ◽

Frederique Van den Eynde

Keyword(s):

Systematic Review ◽

Transcranial Magnetic Stimulation ◽

Major Depression ◽

Magnetic Stimulation ◽

Repetitive Transcranial Magnetic Stimulation ◽

Meta Analysis ◽

Controlled Trials ◽

Cochrane Central Register ◽

Treatment Allocation ◽

Significant Difference

Abstract Repetitive transcranial magnetic stimulation (rTMS) is a safe and effective treatment for major depression (MD). However, the perceived lack of a suitable sham rTMS condition might have compromised the success of blinding procedures in clinical trials. Thus, we conducted a systematic review and meta-analysis of randomized, double-blind and sham-controlled trials (RCTs) on high frequency (HF-), low frequency (LF-) and bilateral rTMS for MD. We searched the literature from January 1995 to July 2012 using Medline, EMBASE, PsycINFO, Cochrane Central Register of Controlled Trials and Scopus. The main outcome measure was participants' ability to correctly guess their treatment allocation at study end. We used a random-effects model and risk difference (RD). Overall, data were obtained from seven and two RCTs on HF- and bilateral rTMS, respectively. No RCT on LF-rTMS reporting on blinding success was found. HF- and bilateral rTMS trials enrolled 396 and 93 depressed subjects and offered an average of approximately 13 sessions. At study end, 52 and 59% of subjects receiving HF-rTMS and sham rTMS were able to correctly guess their treatment allocation, a non-significant difference (RD = −0.04; z = −0.51; p = 0.61). Furthermore, 63.3 and 57.5% of subjects receiving bilateral and sham rTMS were able to correctly guess their treatment allocation, also a non-significant difference (RD = 0.05; z = 0.49; p = 0.62). In addition, the use of angulation and sham coil in HF-rTMS trials produced similar results. In summary, existing sham rTMS interventions appear to result in acceptable levels of blinding regarding treatment allocation.

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Clinical Effect of Intravenous Vitamin C on Viral Myocarditis in Children: A Systematic Review and Meta-Analysis

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2019/3082437 ◽

2019 ◽

Vol 2019 ◽

pp. 1-9

Author(s):

Shuangdi Chen ◽

Wenli Zhao ◽

Binjie Zhang ◽

Yijun Jia ◽

Shihua Wu ◽

...

Keyword(s):

Systematic Review ◽

Vitamin C ◽

Conventional Therapy ◽

Total Effective Rate ◽

Meta Analysis ◽

Viral Myocarditis ◽

Effective Rate ◽

Cochrane Library ◽

Significant Difference ◽

Intravenous Vitamin

Objective. To comprehensively compare the effects of conventional therapy combined with intravenous vitamin C and conventional therapy on viral myocarditis in children through a meta-analysis. Methods. Relevant articles including clinical trials of normal treatment combined with intravenous vitamin C and conventional therapy for viral myocarditis in children that were published between January 2000 and February 2018 were selected from PubMed, Cochrane Library, China National Knowledge Infrastructure, China Science and Technology Journal Database, and WANFANG database. The quality of the included studies was assessed using the Cochrane systematic review method (version 5.1.0); data quality was evaluated by two independent researchers. The total effective rate; LDH, CK, and CK-MB levels; and other indicators were analyzed using Rev Man 5.3 software. Results. Eight studies were eligible for this meta-analysis, which included a total of 426 patients in the treatment group and 363 patients in the control group. The meta-analysis results of six studies showed that the total effective rate of intravenous vitamin C combined with conventional therapy was higher than that of conventional therapy alone [Z = 5.46, 95% confidence interval (CI): 1.21 (1.13 to 1.30), P < 0.00001]; that of five studies showed that LDH levels were lower in children receiving intravenous vitamin C combined with conventional therapy than in those receiving conventional therapy alone [Z = 3.70, 95% CI: −1.88 (−2.88 to −0.88), P = 0.0002]; that of three studies showed that CK levels were lower in children receiving intravenous vitamin C combined with conventional therapy than in those receiving conventional therapy alone [Z = 4.21, 95% CI: −0.55 (−0.81 to −0.30), P < 0.0001]; that of four studies showed that CK-MB levels were lower in children receiving intravenous vitamin C combined with conventional therapy than in those receiving conventional therapy alone [Z = 13.64, 95% CI: −1.44 (−1.65 to −1.24), P < 0.00001]; that of two studies showed that CD3 levels were higher in children receiving intravenous vitamin C combined with conventional therapy than in those receiving conventional therapy alone [Z = 2.45, 95% CI: 0.41 (0.08–0.73), P = 0.01]; that of two studies showed no significant difference in changes in CD4 levels between children receiving intravenous vitamin C combined with conventional therapy and those receiving conventional therapy alone [Z = 0.28, 95% CI: −0.21 (−1.69 to 1.28), P = 0.78]; and that of two studies showed no significant difference in changes in CD4/CD8 between children receiving intravenous vitamin C combined with conventional therapy and those receiving conventional therapy alone [Z = 0.07, 95% CI: −0.03 (−0.73 to 0.67), P = 0.94]. Conclusion. The meta-analysis results showed that intravenous vitamin C combined with conventional therapy is better than the simple, conventional therapy for the treatment of viral myocarditis in children in terms of the total effective rate and LDH, CK, and CK-MB levels.

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Verum versus Sham Manual Acupuncture for Migraine: A Systematic Review of Randomised Controlled Trials

Acupuncture in Medicine ◽

10.1136/acupmed-2015-010903 ◽

2016 ◽

Vol 34 (2) ◽

pp. 76-83 ◽

Cited By ~ 12

Author(s):

Yan Yang ◽

Qinghui Que ◽

Xiaode Ye ◽

Guo hua Zheng

Keyword(s):

Systematic Review ◽

Recurrence Rate ◽

Randomised Controlled Trials ◽

Total Effective Rate ◽

Effective Rate ◽

Sham Acupuncture ◽

Risk Of Bias ◽

Controlled Trials ◽

Manual Acupuncture ◽

Randomised Controlled

Background Manual acupuncture (MA) is commonly used as a treatment for migraine in China. However, its specific clinical effects have been challenged on the basis that some of its effects may relate to psychological or ‘placebo’ mechanisms. Objective To identify the effectiveness of verum MA compared with sham acupuncture for the treatment of migraine. Methods Eight electronic databases were searched for randomised controlled trials (RCTs) evaluating the effect of verum versus sham MA on migraine. The quality of included trials was assessed using the ‘risk of bias’ tool provided by the Cochrane Handbook for Systematic Review of Intervention. RevMan 5.2 software was used for data analysis. Results Ten trials with 997 participants were included. Most trials had high methodological quality and were at low risk of bias. Meta-analysis showed superior effects of verum MA over sham acupuncture on the total effective rate, reflected by a reduction in the ‘not effective’ rate (relative risk (RR) 0.24, 95% CI 0.15 to 0.38; p<0.0001, four trials) and a reduced recurrence rate (RR 0.47, 95% CI 0.28 to 0.81; p=0.006, two trials), but no significant differences in headache intensity, frequency or duration, accompanying symptoms and use of medication. No severe adverse events related to acupuncture occurred during treatment with either verum or sham MA. Conclusions Current clinical evidence suggests that verum acupuncture is superior to sham acupuncture in migraine, reflected by a higher total effective rate and decreased recurrence rate. Nevertheless, further large-scale RCTs with a rigorous design are required to confirm these findings in view of the relative paucity of eligible RCTs and small sample sizes of those included.

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Difluprednate versus Prednisolone Acetate after Cataract Surgery: a Systematic Review and Meta-Analysis

BMJ Open ◽

10.1136/bmjopen-2018-026752 ◽

2019 ◽

Vol 9 (11) ◽

pp. e026752

Author(s):

Mahmoud Tawfik KhalafAllah ◽

Ahmed Basiony ◽

Ahmed Salama

Keyword(s):

Systematic Review ◽

Cataract Surgery ◽

Meta Analysis ◽

Prednisolone Acetate ◽

Controlled Trials ◽

Topical Steroids ◽

Cochrane Central Register ◽

Small Incision Cataract Surgery ◽

Significant Difference ◽

Evidence Quality

ObjectiveTopical steroids are the cornerstone in controlling the inflammation after cataract surgery. Prednisolone acetate and difluprednate are the two main products for this purpose. However, it is unclear which one should be used in terms of effectiveness and safety.DesignSystematic review and meta-analysis.Data sourcesMedline via PubMed, Cochrane Central Register of Controlled Trials, Web of science and clinicaltrials.gov were searched through 10 January 2018, and updated on 20 July 2019, in addition to researching the references’ lists of the relevant articles.Eligibility criteriaRandomised-controlled trials (RCTs) comparing difluprednate and prednisolone acetate regardless of the dosing regimen used.Data extraction and synthesisTwo independent authors assessed the included RCTs regarding the risk of bias using the Cochrane tool. Relevant data were extracted, and meta-analysis was conducted using a random-effects model. The Grading of Recommendations Assessment, Development, and Evaluation approach was used to appraise the evidence quality.ResultsWe included six RCTs with 883 patients: 441 received difluprednate and 442 received prednisolone acetate. The evidence quality was graded as moderate for corneal oedema and intraocular pressure and low for anterior chamber (AC) clearance. After small incision cataract surgery, difluprednate was superior in clearing AC cells at 1 week (OR=2.5, p>0.00001) and at 2 weeks (OR=2.5, p=0.04), as well as clearing the AC flare at 2 weeks (OR=6.7, p=0.04). After phacoemulsification, difluprednate was superior in terms of corneal clarity at 1 day (OR=2.6, p=0.02) and 1 week after surgery (OR=1.96, p=0.0007). No statistically significant difference was detected between both agents at 1 month in effectiveness. Also, both agents were safe, evaluated by the ocular hypertension (OR=1.23, p=0.8).ConclusionWith low-to-moderate certainty, difluprednate and prednisolone acetate are safe agents for controlling the inflammation after cataract surgery. Difluprednate showed significant superiority in terms of AC cells and AC flare at 2 weeks postoperatively.

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Auricular Plaster Therapy for Comorbid Insomnia: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Evidence-based Complementary and Alternative Medicine ◽

10.1155/2019/7120169 ◽

2019 ◽

Vol 2019 ◽

pp. 1-17 ◽

Cited By ~ 2

Author(s):

Huimin Zhao ◽

Dan Li ◽

Ying Yang ◽

Yueting Liu ◽

Jie Li ◽

...

Keyword(s):

Systematic Review ◽

Randomized Controlled Trials ◽

Large Scale ◽

Meta Analysis ◽

Effective Rate ◽

Sensitivity Analyses ◽

Controlled Trials ◽

Comorbid Insomnia ◽

Randomized Controlled ◽

Significant Difference

Background. Although the effectiveness of auricular plaster therapy (APT) on primary insomnia has been systematically reviewed, no systematic review of studies has focused on the effect on comorbid insomnia. Objective. To evaluate the efficacy and safety of APT for comorbid insomnia. Methods. Fifteen databases were searched from inception to July 2018. Randomized controlled trials (RCTs) of APT as an exclusive intervention for comorbid insomnia against Western medications, sham APT or no treatment were identified. Results. Fourteen studies involving 928 participants were identified. The pooled outcomes revealed that APT was superior to control conditions for the global score on PSQI (SMD = -1.13, and 95% CI = -1.48—-0.78) and the effective rate (RR = 1.24, 95% CI = 1.13—1.36, NNT = 5, and 95% CI =4—7). Furthermore, the results of subgroup analyses were similar to the pooled results. Additionally, the pooled results were verified to be stable by sensitivity analyses. Regarding safety, no significant difference was identified between APT and Western medications. Conclusions. APT appears to be an effective and safe treatment for comorbid insomnia. However, the benefits of APT for comorbid insomnia could not be ascertained due to the paucity of the quantity and quality of the included studies. Large-scale studies using proper methodology are needed to yield a firm conclusion.

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Impact of levothyroxine in women with positive thyroid antibodies on pregnancy outcomes: a systematic review and meta-analysis of randomised controlled trials

BMJ Open ◽

10.1136/bmjopen-2020-043751 ◽

2021 ◽

Vol 11 (2) ◽

pp. e043751

Author(s):

Lorraine Lau ◽

Jamie L Benham ◽

Patricia Lemieux ◽

Jennifer Yamamoto ◽

Lois E Donovan

Keyword(s):

Systematic Review ◽

Preterm Delivery ◽

Pregnancy Outcomes ◽

Randomised Controlled Trials ◽

Meta Analysis ◽

Risk Of Bias ◽

Controlled Trials ◽

Cochrane Central Register ◽

Significant Difference ◽

Randomised Controlled

ObjectiveTo evaluate the effect of levothyroxine therapy on pregnancy outcomes compared with placebo or no treatment in women without overt hypothyroidism with presence of thyroid peroxidase antibodies (TPOAb) and/or thyroglobulin antibodies (TgAb).DesignSystematic review and meta-analysis of randomised controlled trialsStudy eligibility criteriaPrespecified criteria for inclusion were: randomised trials of levothyroxine versus control (placebo or no treatment) among women with positive TPOAb or TgAb who were pregnant or considering conception.Data sourcesOvid MEDLINE, EMBASE, CINAHL, Cochrane Database of Systematic Reviews and Cochrane Central Register of Controlled Trials were searched from 1980 to 5 November 2020.Outcome measuresPrespecified data elements were extracted and where appropriate, meta-analyses were conducted. Main outcomes include pregnancy achieved, miscarriage, preterm delivery and live birth.Risk of bias assessmentCochrane Risk of Bias Tool for Quality Assessment of Randomised Controlled Trials.ResultsFrom 3023 citations, 79 citations were identified for full-text review. Of these, six trials (total of 2263 women) were included for qualitative and quantitative analyses. Risk of bias was deemed low for only one trial. There was no significant difference in the relative risk (RR) of pregnancy achieved (RR 1.03; 95% CI 0.93 to 1.13), miscarriage (RR 0.93; 95% CI 0.76 to 1.14), preterm delivery (RR 0.66; 95% CI 0.39 to 1.10) or live births (RR 1.01; 95% CI 0.89 to 1.16) in thyroid autoimmune women treated with levothyroxine compared with controls. Sensitivity analyses of preterm birth identified study quality and timing of levothyroxine initiation as sources of heterogeneity.ConclusionsAmong pregnant women or women planning conception, with thyroid autoimmunity, there is a lack of evidence of benefit for levothyroxine use (moderate to high Grading of Recommendations, Assessment, Development and Evaluations). Recommendations to use levothyroxine in this setting need to be reconsidered.PROSPERO registration numberCRD42019130459.

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