publication bias

出版偏见
  • 文章类型: Journal Article
    背景:阴燃多发性骨髓瘤(SMM),多发性骨髓瘤(MM)的无症状前兆,具有可变的进展至MM的风险。关于SMM的疗效或最佳治疗时机几乎没有共识。我们系统地回顾了SMM所有临床试验的情况。我们将SMM中研究的治疗方案的疗效与新诊断的多发性骨髓瘤(NDMM)中使用这些方案的结果进行了比较,以确定数据是否表明SMM与NDMM的反应更深。
    方法:所有针对SMM的前瞻性介入临床试验,包括已发表的研究报告,会议摘要,并确定了截至2023年4月1日在ClinicalTrials.gov上列出的未发表的试验。捕获了与试验相关的变量,包括治疗策略和疗效结果。相关临床终点定义为总生存期(OS)和生活质量。
    结果:在确定的45项SMM试验中,38(84.4%)评估了活性骨髓瘤药物,7(15.6%)仅研究了骨改性剂。在SMM的18项随机试验中,只有1个(5.6%)的主要终点为OS;最常见的主要终点为无进展生存期(n=7,38.9%).在32个有可用结果的SMM试验中,9人(28.1%)达到了预定的主要终点,其中5项为单臂研究。在SMM和NDMM中测试了6种治疗方案;与相应的NDMM试验相比,5种方案在SMM中产生了较低的非常好的部分缓解率或更好的(≥VGPR)(32%vs63%,43%vs53%,40%vs63%,86%vs89%,92%vs95%,94%和87%,分别)。
    结论:在对SMM的所有前瞻性介入临床试验的系统综述中,我们在试验设计中发现了显著的可变性,包括随机化状态,主要终点,以及使用的干预类型。尽管有统计限制,治疗方案的比较没有令人信服的证据表明,与NDMM相比,在SMM早期引入治疗方案更有效.
    BACKGROUND: Smoldering multiple myeloma (SMM), an asymptomatic precursor of multiple myeloma (MM), carries a variable risk of progression to MM. There is little consensus on the efficacy or optimal timing of treatment in SMM. We systematically reviewed the landscape of all clinical trials in SMM. We compared the efficacy of treatment regimens studied in SMM to results from these regimens when used in newly diagnosed multiple myeloma (NDMM), to determine whether the data suggest deeper responses in SMM versus NDMM.
    METHODS: All prospective interventional clinical trials for SMM, including published studies, meeting abstracts, and unpublished trials listed on ClinicalTrials.gov up to April 1, 2023, were identified. Trial-related variables were captured, including treatment strategy and efficacy results. Relevant clinical endpoints were defined as overall survival (OS) and quality of life.
    RESULTS: Among 45 SMM trials identified, 38 (84.4%) assessed active myeloma drugs, while 7 (15.6%) studied bone-modifying agents alone. Of 18 randomized trials in SMM, only one (5.6%) had a primary endpoint of OS; the most common primary endpoint was progression-free survival (n = 7, 38.9%). Among 32 SMM trials with available results, 9 (28.1%) met their prespecified primary endpoint, of which 5 were single-arm studies. Six treatment regimens were tested in both SMM and NDMM; 5 regimens yielded a lower rate of very good partial response rate or better (≥VGPR) in SMM compared to the corresponding NDMM trial (32% vs 63%, 43% vs 53%, 40% vs 63%, 86% vs 89%, 92% vs 95%, and 94% vs 87%, respectively).
    CONCLUSIONS: In this systematic review of all prospective interventional clinical trials in SMM, we found significant variability in trial design, including randomization status, primary endpoints, and types of intervention used. Despite the statistical limitations, comparison of treatment regimens revealed no compelling evidence that the treatment is more effective when introduced early in SMM compared to NDMM.
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  • 文章类型: Systematic Review
    人们已经认识到,与艾滋病毒相关的污名阻碍了检测工作,治疗,和预防。在这次系统审查中,我们的目的是总结艾滋病毒相关的污名和年龄之间的关联的现有发现,社会支持,教育状况,抑郁症,就业状况,财富指数,性别,residence,关于艾滋病毒的知识,婚姻状况,自诊断以来的持续时间,和披露状况使用了大量的研究。
    电子数据库,包括Scopus,Medline/PubMed,WebofSciences(WOS),科克伦图书馆,谷歌学者,和开放研究数据集挑战进行了系统搜索,直到2023年4月15日。我们包括了各种艾滋病毒污名研究,不管语言,发布日期,或地理位置。40项研究符合纳入标准,共有171627名患者。使用混合效应模型来汇集估计值和评估发表偏差,以及进行敏感性分析。
    年龄等因素,社会支持,高等教育,更高的社会经济地位,良好的艾滋病毒知识,和更长的艾滋病毒感染年限显著降低了与艾滋病毒相关的耻辱的可能性。相反,抑郁等因素,居住在农村地区,女性受访者,和未披露HIV状况与HIV相关污名的高风险显著相关.
    为了对抗与艾滋病毒相关的系统性耻辱,通过提高社区一级的艾滋病毒认识,发展健康和全面的社会方法至关重要。除了激进主义,地方经济发展对于建立具有强大社会结构的繁荣社区也至关重要。
    UNASSIGNED: It has been recognized that HIV-related stigma hinders efforts in testing, treatment, and prevention. In this systematic review, we aimed to summarize available findings on the association between HIV-related stigma and age, social support, educational status, depression, employment status, wealth index, gender, residence, knowledge about HIV, marital status, duration since diagnosis, and disclosure status using a large number of studies.
    UNASSIGNED: Electronic databases including Scopus, Medline/PubMed, Web of Sciences (WOS), Cochrane Library, Google Scholar, and Open Research Dataset Challenge were systematically searched until 15 April 2023. We included all kinds of HIV-stigma studies, regardless of language, publishing date, or geographic location. The inclusion criteria were met by 40 studies, with a total of 171,627 patients. A mixed-effect model was used to pool estimates and evaluate publication bias, as well as to conduct sensitivity analysis.
    UNASSIGNED: Factors such as older age, social support, greater education, higher socioeconomic status, good knowledge of HIV, and longer years of living with HIV significantly lowered the likelihood of HIV-related stigma. Contrarily, factors such as depression, residing in rural areas, female respondents, and non-disclosure of HIV status were significantly associated with a high risk of HIV-related stigma.
    UNASSIGNED: To combat systemic HIV-associated stigma, it is crucial to develop wholesome and comprehensive social methods by raising community-level HIV awareness. In addition to activism, local economic development is also crucial for creating thriving communities with a strong social fabric.
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  • 文章类型: Comparative Study
    背景:评估腹腔镜结直肠切除术中低腹内压和高腹内压的结果。
    方法:对多个电子数据源进行了系统搜索,纳入了所有比较低和高(标准)腹内压的研究.我们的主要结果是术后肠梗阻的发生和肠蠕动/排气的恢复。评估的次要结果包括:总手术时间,术后出血,吻合口漏,肺炎,手术部位感染,术后总体并发症(按Clavien-Dindo分级分类),和住院时间。使用Revman5.4进行数据分析。
    结果:共纳入6项随机对照试验(RCT)和1项观察性研究,共771例患者(370例低腹压手术,401例高腹压手术)。所有测量结果无统计学差异;术后肠梗阻[OR0.80;CI(0.42,1.52),P=0.50],排气时间[OR-4.31;CI(-12.12,3.50),P=0.28],总手术时间[OR0.40;CI(-10.19,11.00),P=0.94],术后出血[OR1.51;CI(0.41,5.58,P=0.53],吻合口漏[OR1.14;CI(0.26,4.91),P=0.86],肺炎[OR1.15;CI(0.22,6.09),P=0.87],SSI[OR0.69;CI(0.19,2.47),P=0.57],术后总并发症[OR0.82;CI(0.52,1.30),P=0.40],Clavien-Dindo等级≥3[OR1.27;CI(0.59,2.77),P=0.54],和住院时间[OR-0.68;CI(-1.61,0.24),P=0.15]。
    结论:低腹内压是腹腔镜结直肠切除术安全可行的方法,其结局不低于标准或高压。需要更强大且功能良好的RCT来巩固低压高于高压的腹腔内手术的潜在益处。
    BACKGROUND: To evaluate outcomes of low with high intraabdominal pressure during laparoscopic colorectal resection surgery.
    METHODS: A systematic search of multiple electronic data sources was conducted, and all studies comparing low with high (standard) intraabdominal pressures were included. Our primary outcomes were post-operative ileus occurrence and return of bowel movement/flatus. The evaluated secondary outcomes included: total operative time, post-operative haemorrhage, anastomotic leak, pneumonia, surgical site infection, overall post-operative complications (categorised by Clavien-Dindo grading), and length of hospital stay. Revman 5.4 was used for data analysis.
    RESULTS: Six randomised controlled trials (RCTs) and one observational study with a total of 771 patients (370 surgery at low intraabdominal pressure and 401 at high pressures) were included. There was no statistically significant difference in all the measured outcomes; post-operative ileus [OR 0.80; CI (0.42, 1.52), P = 0.50], time-to-pass flatus [OR -4.31; CI (-12.12, 3.50), P = 0.28], total operative time [OR 0.40; CI (-10.19, 11.00), P = 0.94], post-operative haemorrhage [OR 1.51; CI (0.41, 5.58, P = 0.53], anastomotic leak [OR 1.14; CI (0.26, 4.91), P = 0.86], pneumonia [OR 1.15; CI (0.22, 6.09), P = 0.87], SSI [OR 0.69; CI (0.19, 2.47), P = 0.57], overall post-operative complications [OR 0.82; CI (0.52, 1.30), P = 0.40], Clavien-Dindo grade ≥ 3 [OR 1.27; CI (0.59, 2.77), P = 0.54], and length of hospital stay [OR -0.68; CI (-1.61, 0.24), P = 0.15].
    CONCLUSIONS: Low intraabdominal pressure is safe and feasible approach to laparoscopic colorectal resection surgery with non-inferior outcomes to standard or high pressures. More robust and well-powered RCTs are needed to consolidate the potential benefits of low over high pressure intra-abdominal surgery.
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  • 文章类型: Journal Article
    目的:探讨hOGG1rs1052133多态性与鼻咽癌(NPC)发生的关系。方法:PubMed,WebofScience,Scopus,CNKI,Wanfangdata,和VIP用于搜索研究,NOS评估量表用于评估质量。所有研究都根据不同的基因型进行分组。采用Cochrane的Q检验和I2检验进行异质性评价。如果异质性很小,使用固定效应模型,反过来,采用随机效应模型。还检测到出版偏倚。所有结果的P<.05表明有统计学意义。结果:我们最终纳入了6项研究,研究组为2021例NPC患者,对照组为2375例健康人群。经过荟萃分析,发现“Ser/Cys(CG)vsSer/Ser(CC)”组的总OR值为1.00(95%CI:0.85-1.18),“Cys/Cys(GG)vsSer/Ser(CC)”组为1.06(95%CI:0.87-1.28)。这些结果无统计学意义(P>.05)。此外,在有或没有吸烟史的情况下,每组的综合总OR值均无统计学意义,即使在其他基因型模型中(等位基因,占主导地位,隐性,和添加剂)(P>.05)。结论:hOGG1rs1052133多态性与鼻咽癌的发生无明显相关性,即使有或没有吸烟史。
    Objectives: Exploring the relationship between the hOGG1 rs1052133 polymorphism and the occurrence of nasopharyngeal carcinoma (NPC). Methods: PubMed, Web of Science, Scopus, CNKI, Wanfangdata, and VIP were used to search for studies and the NOS evaluation scale was used to evaluate the quality. All studies were grouped according to different genotypes. The Cochrane\'s Q test and I2 test were used for heterogeneity evaluations. If heterogeneity was small, the fixed effects model was used, and conversely, the random effects model was used. Publication bias was also detected. P < .05 in all results indicated statistically significant. Results: We ultimately included 6 studies with 2021 NPC patients in the study group and 2375 healthy populations in the control group. After meta-analysis, it was found that the total OR value of the \"Ser/Cys (CG) vs Ser/Ser (CC)\" group was 1.00 (95% CI: 0.85-1.18) and the \"Cys/Cys (GG) vs Ser/Ser (CC)\" group was 1.06 (95% CI: 0.87-1.28). These results were not statistically significant (P > .05). Furthermore, the integrated total OR values of each group were not statistically significant with or without the smoking history, even in other genotype models (Allele, Dominant, Recessive, and Additive) (P > .05). Conclusion: There is no clear correlation between the hOGG1 rs1052133 polymorphism and the occurrence of NPC, even with or without the smoking history.
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  • 文章类型: Meta-Analysis
    背景:以前的文献探讨了慢性萎缩性胃炎(CAG)与上消化道癌中孤立性癌症之间的关系;然而,明显缺乏整个上消化道癌症的综合合成。研究目的是评估CAG与上消化道癌发病风险之间的关系。特别包括胃癌,食道癌,和食管胃结合部癌。
    方法:在三个主要数据库中进行了严格的系统搜索,即PubMed,Embase和WebofScience,涵盖从数据库开始到2023年8月10日的时间表。我们提取了必要的比值比(OR)及其相应的95%置信区间(CI),用于后续的荟萃分析。采用Stata17.0软件进行统计分析。
    结果:本荟萃分析共纳入23篇文章,包括5858例上消化道癌症患者。CAG导致发生胃癌的风险增加4.12倍(OR=4.12,95%CI3.20-5.30)。同样,CAG与发生食管癌的风险增加2.08倍相关(OR=2.08,95CI1.60-2.72)。有趣的是,发现CAG与食管鳞状细胞癌的发生风险之间存在特定的相关性(OR=2.29,95CI1.77-2.95),而未检测到食管腺癌的显著相关性(OR=0.62,95CI0.17-2.26)。此外,CAG与食管胃结合部癌的风险增加2.77倍相关(OR=2.77,95CI2.21-3.46)。值得注意的是,对于相同类型的上消化道癌症,观察到,与通过血清学方法诊断CAG相比,通过组织学方法诊断CAG与发生癌症的风险高33-77%相关.
    结论:这项荟萃分析表明,胃癌的风险增加了两到四倍,食道癌,和食管胃结合部癌患者的CAG。重要的是,同样的上消化道癌症,与血清学诊断相比,组织学诊断为CAG时发生癌症的风险更高.需要进一步严格的研究设计来探索通过两种诊断方法诊断的CAG对上消化道癌症风险的影响。
    BACKGROUND: Previous literature has explored the relationship between chronic atrophic gastritis (CAG) and isolated cancers within the upper gastrointestinal cancers; However, an integrative synthesis across the totality of upper gastrointestinal cancers was conspicuously absent. The research objective was to assess the relationship between CAG and the risk of incident upper gastrointestinal cancers, specifically including gastric cancer, oesophageal cancer, and oesophagogastric junction cancer.
    METHODS: Rigorous systematic searches were conducted across three major databases, namely PubMed, Embase and Web of Science, encompassing the timeline from database inception until August 10, 2023. We extracted the necessary odds ratio (OR) and their corresponding 95% confidence interval (CI) for subsequent meta-analysis. Statistical analyses were conducted using Stata 17.0 software.
    RESULTS: This meta-analysis included a total of 23 articles encompassing 5858 patients diagnosed with upper gastrointestinal cancers. CAG resulted in a statistically significant 4.12-fold elevated risk of incident gastric cancer (OR = 4.12, 95% CI 3.20-5.30). Likewise, CAG was linked to a 2.08-fold increased risk of incident oesophageal cancer (OR = 2.08, 95%CI 1.60-2.72). Intriguingly, a specific correlation was found between CAG and the risk of incident oesophageal squamous cell carcinoma (OR = 2.29, 95%CI 1.77-2.95), while no significant association was detected for oesophageal adenocarcinoma (OR = 0.62, 95%CI 0.17-2.26). Moreover, CAG was correlated with a 2.77-fold heightened risk of oesophagogastric junction cancer (OR = 2.77, 95%CI 2.21-3.46). Notably, for the same type of upper gastrointestinal cancer, it was observed that diagnosing CAG through histological methods was linked to a 33-77% higher risk of developing cancer compared to diagnosing CAG through serological methods.
    CONCLUSIONS: This meta-analysis indicated a two- to fourfold increased risk of gastric cancer, oesophageal cancer, and oesophagogastric junction cancer in patients with CAG. Importantly, for the same upper gastrointestinal cancer, the risk of incident cancer was higher when CAG was diagnosed histologically compared to serological diagnosis. Further rigorous study designs are required to explore the impact of CAG diagnosed through both diagnostic methods on the risk of upper gastrointestinal cancers.
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  • 文章类型: Journal Article
    创造力被广泛认为是在现代世界取得成功所必需的技能。已经制定了许多创造力培训计划,一些荟萃分析试图总结这些程序的有效性,并确定影响其影响的特征。不幸的是,以前的荟萃分析有许多局限性,最值得注意的是,忽略了发表偏倚的潜在强烈影响以及研究质量对效应大小的影响。我们对50年来的169项创造力培训研究进行了荟萃分析(844项效应大小,迄今为止最大的创造力培训荟萃分析),包括大量未发表的研究(48项研究;262个效应大小)。我们采用了一系列统计方法来检测和调整发表偏倚,并评估了该领域证据的稳健性。与以前的荟萃分析一致,我们发现中等训练效应(0.53SDs;未对发表偏倚进行校正).严重的,我们观察到与强烈发表偏倚一致的汇聚证据.所有调整方法都大大降低了我们的原始估计值(调整后的估计值从0.29到0.32SDs)。这种严重的偏见使人怀疑该领域已发表文献的代表性以及先前荟萃分析的结论。我们的分析还揭示了创造力训练研究中方法论缺陷的高度流行(可能夸大了我们的平均效果),随着时间的推移,方法上的改进几乎没有迹象——这种情况限制了这项工作的有用性。最后,我们提出了对研究人员和从业人员的启示和建议,我们提出了未来研究的议程。(PsycInfo数据库记录(c)2024APA,保留所有权利)。
    Creativity is widely considered a skill essential to succeeding in the modern world. Numerous creativity training programs have been developed, and several meta-analyses have attempted to summarize the effectiveness of these programs and identify the features influencing their impact. Unfortunately, previous meta-analyses share a number of limitations, most notably overlooking the potentially strong impact of publication bias and the influence of study quality on effect sizes. We undertook a meta-analysis of 169 creativity training studies across 5 decades (844 effect sizes, the largest meta-analysis of creativity training to date), including a substantial number of unpublished studies (48 studies; 262 effect sizes). We employed a range of statistical methods to detect and adjust for publication bias and evaluated the robustness of the evidence in the field. In line with previous meta-analyses, we found a moderate training effect (0.53 SDs; unadjusted for publication bias). Critically, we observed converging evidence consistent with strong publication bias. All adjustment methods considerably lowered our original estimate (adjusted estimates ranged from 0.29 to 0.32 SDs). This severe bias casts doubt on the representativeness of the published literature in the field and on the conclusions of previous meta-analyses. Our analysis also revealed a high prevalence of methodological shortcomings in creativity training studies (likely to have inflated our average effect), and little signs of methodological improvement over time-a situation that limits the usefulness of this body of work. We conclude by presenting implications and recommendations for researchers and practitioners, and we propose an agenda for future research. (PsycInfo Database Record (c) 2024 APA, all rights reserved).
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  • 文章类型: Journal Article
    目的描述可用于评估随机对照试验(RCT)组的出版物完整性的统计工具。对于连续变量,工具评估基线手段,基线p值,以及相同手段和/或SD的出现。对于分类变量,他们评估基线p值,单个或所有变量的频率计数,随机或退出的试验参与者数量,并将报告的p值与独立计算的p值进行比较。这些工具已用于识别各个组的RCT中的出版物完整性问题,并在可接受的水平上区分有意捏造的基线汇总数据与真实随机对照试验的数据。当个人/团体对RCT(s)提出担忧时,以及当他们的整个工作正在接受检查时,可以使用这些工具,在进行系统审查时,并且可以在期刊提交时进行调整以帮助筛查RCT。结论统计工具可用于评估RCT组的出版物完整性。
    OBJECTIVE: To describe statistical tools available for assessing publication integrity of groups of randomized controlled trials (RCTs).
    METHODS: Narrative review.
    RESULTS: Freely available statistical tools have been developed that compare the observed distributions of baseline variables with the expected distributions that would occur if successful randomization occurred. For continuous variables, the tools assess baseline means, baseline P values, and the occurrence of identical means and/or standard deviation. For categorical variables, they assess baseline P values, frequency counts for individual or all variables, numbers of trial participants randomized or withdrawing, and compare reported with independently calculated P values. The tools have been used to identify publication integrity concerns in RCTs from individual groups, and performed at an acceptable level in discriminating intentionally fabricated baseline summary data from genuine RCTs. The tools can be used when concerns have been raised about RCT(s) from an individual/group and when the whole body of their work is being examined, when conducting systematic reviews, and could be adapted to aid screening of RCTs at journal submission.
    CONCLUSIONS: Statistical tools are useful for the assessment of publication integrity of groups of RCTs.
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  • 文章类型: Meta-Analysis
    背景:近年来,一些研究报道了糖尿病与腕管综合征(CTS)之间的关系。然而,由于它们相互矛盾的结果,我们进行了系统评价和荟萃分析以调查这一主题.
    方法:本研究是对发表在ISIWebofScience上的研究的系统综述和荟萃分析,Scopus,PubMed,科克伦,谷歌学者,和Embase数据库。使用卡方检验等统计检验评估荟萃分析中包含的研究中的异质性,I2和森林地块。使用Begg\和Egger测试评估出版偏倚。
    结果:这项调查分析了1985年至2022年之间进行的42项研究的数据,共有3,377,816名参与者。荟萃分析表明,有糖尿病史的参与者与没有糖尿病史的参与者相比,CTS的比值比(OR)为1.90(95%CI:1.64-2.21;P值<0.001)。鉴于在本研究中观察到发表偏倚(Begg检验P值=0.01),修正的OR是在考虑遗漏研究的情况下计算的,为1.68(95%CI:1.45-1.94;P值<0.001)。
    结论:这项研究的结果表明,与非糖尿病患者相比,糖尿病患者发生CTS的几率高90%,具有统计学意义。
    BACKGROUND: In recent years, several studies have reported on the relationship between diabetes and carpal tunnel syndrome (CTS). However, due to their contradictory results, a systematic review and meta-analysis were conducted to investigate this subject.
    METHODS: This study is a systematic review and meta-analysis of studies published in ISI Web of Science, Scopus, PubMed, Cochrane, Google Scholar, and Embase databases. Heterogeneity in the studies included in the meta-analysis was evaluated using statistical tests such as the Chi-square test, I2, and forest plots. Publication bias was assessed using Begg\'s and Egger\'s tests.
    RESULTS: This investigation analyzed data from 42 studies conducted between 1985 and 2022, with a total of 3,377,816 participants. The meta-analysis demonstrated that the odds ratio (OR) of CTS in participants with a history of diabetes compared to those without was 1.90 (95% CI: 1.64-2.21; P-value < 0.001). Given that publication bias was observed in this study (Begg\'s test P-value = 0.01), the modified OR was calculated with consideration of missed studies, which was 1.68 (95% CI: 1.45-1.94; P-value < 0.001).
    CONCLUSIONS: The results of this study suggest that diabetic patients have 90% higher odds of developing CTS compared to non-diabetic individuals, which is statistically significant.
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  • 文章类型: Systematic Review
    背景:给予骨髓(BM)衍生细胞以恢复灌注在临床前研究中显示出有希望的结果。然而,慢性威胁肢体缺血(CLTI)的临床研究结果相互矛盾.我们对临床前研究进行了系统回顾和荟萃分析,以评估BM衍生细胞在恢复后肢缺血模型(HLI)中相对灌注的功效,并确定治疗功效的可能决定因素。
    方法:1月10日,在PubMed和EMBASE中进行系统检索,确定了在HLI模型中评估BMMNC或BMMSCs并包括相对灌注作为结果测量的体内动物研究,2022年。使用SYRCLE的偏倚风险工具评估偏倚风险。提取了有关相对灌注的研究特征和结果数据。使用从每个研究中每个研究臂的最大相对灌注计算的平均差进行随机效应荟萃分析。
    结果:85项研究包括1053只动物。我们的荟萃分析显示,与对照组相比,BM细胞给药后患肢的灌注显着增加(效应大小18.3(95%CI15.9-20.7,p<0.001)。然而,我们观察到研究之间的高度异质性(I291%),这不能用剂量来解释,物种,细胞类型或给药途径。由于报告不完整,几种偏倚的风险尚不清楚。我们还在这个证据基础中发现了发表偏倚的重大风险。
    结论:在CLTI的动物模型中,BM衍生的细胞疗法具有有益的作用。然而,根据等级评估,证据的确定性较低。这种方法的转化实施应该考虑到这一点。
    Preclinical and clinical studies on the administration of bone marrow-derived cells to restore perfusion show conflicting results. We conducted a systematic review and meta-analysis on preclinical studies to assess the efficacy of bone marrow-derived cells in the hind limb ischemia model and identify possible determinants of therapeutic efficacy. In vivo animal studies were identified using a systematic search in PubMed and EMBASE on 10 January 2022. 85 studies were included for systematic review and meta-analysis. Study characteristics and outcome data on relative perfusion were extracted. The pooled mean difference was estimated using a random effects model. Risk of bias was assessed for all included studies. We found a significant increase in perfusion in the affected limb after administration of bone marrow-derived cells compared to that in the control groups. However, there was a high heterogeneity between studies, which could not be explained. There was a high degree of incomplete reporting across studies. We therefore conclude that the current quality of preclinical research is insufficient (low certainty level as per GRADE assessment) to identify specific factors that might improve human clinical trials.
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  • 文章类型: Letter
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