lain Hargreaves, University of Liverpool, United Kingdom lain Hargreaves,利物浦大學,英國
Reviewed by: 評論者:
Guillermo Lopez Lluch, Universidad Pablo de Olavide, Spain Giuseppe Vita, University of Messina, Italy Guillermo Lopez Lluch,西班牙 Pablo de Olavide 大學 Giuseppe Vita,義大利墨西拿大學
This article was submitted to Drugs Outcomes Research and 本文已提交至 Drugs Outcomes Research and
Policies, 政策、
a section of the journal Frontiers in Pharmacology 《藥理前沿》期刊的一個版塊
Received: 25 February 2022 Accepted: 31 May 2022 收到:收稿日期: 2022 年 2 月 25 日 接受日期: 2022 年 5 月 31 日收稿日期:2022 年 5 月 31 日
Published: 24 August 2022 出版日期:2022 年 8 月 24 日
Citation: 引用:
Tsai I-C, Hsu C-W, Chang C-H, Tseng P-T and Chang K-V (2022) Effectiveness of Coenzyme Q10 Supplementation for Reducing Fatigue: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Tsai I-C, Hsu C-W, Chang C-H, Tseng P-T and Chang K-V (2022) Effectiveness of Coenzyme Q10 Supplementation for Reducing Fatigue:系統回顧與隨機對照試驗的 Meta 分析。
Front. Pharmacol. 13:883251. doi: 10.3389/fphar.2022.883251 前方。Pharmacol.13:883251. DOI: 10.3389/fphar.2022.883251
Effectiveness of Coenzyme Q10 Supplementation for Reducing Fatigue: A Systematic Review and Meta-Analysis of Randomized Controlled Trials 補充輔酵素 Q10 對減少疲勞的效果:隨機對照試驗的系統回顧與元分析
I-Chen Tsai ^(1,2,3){ }^{1,2,3}, Chih-Wei Hsu ^(4,5){ }^{4,5}, Chun-Hung Chang ^(6,7,8){ }^{6,7,8}, Ping-Tao Tseng ^(9,10,11){ }^{9,10,11} and Ke-Vin Chang ^("12,13,14* "){ }^{\text {12,13,14* }}^(1){ }^{1} Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ^(2){ }^{2} Congenital Heart Disease Study Group, Asian Society of Cardiovascular Imaging, Seoul, Korea, ^(3){ }^{3} InnovaRad Inc., Taichung, Taiwan, ^(4){ }^{4} Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan, ^(5){ }^{5} Department of Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan, ^(6){ }^{6} Institute of Clinical Medical Science, China Medical University, Taichung, Taiwan, ^(7){ }^{7} Department of Psychiatry and Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan, ^(8){ }^{8} An Nan Hospital, China Medical University, Tainan, Taiwan, ^(9){ }^{9} Prospect Clinic for Otorhinolaryngology and Neurology, Kaohsiung, Taiwan, ^(10){ }^{10} Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan, ^(11){ }^{11} Department of Psychology, College of Medical and Health Science, Asia University, Taichung, Taiwan, ^(1){ }^{1} 國立陽明交通大學臨床醫學研究所,台北,台灣, ^(2){ }^{2} 先天性心臟病研究小組,亞洲心血管影像學會,首爾,韓國, ^(3){ }^{3} InnovaRad Inc、台中,台灣, ^(4){ }^{4} 高雄長庚紀念醫院暨長庚大學醫學院精神醫學系,高雄,台灣, ^(5){ }^{5} 國立成功大學電腦科學暨資訊工程學系,台南,台灣, ^(6){ }^{6} 中國醫藥大學臨床醫學研究所,台中,台灣, ^(7){ }^{7} 精神醫學系暨腦部疾病研究中心、 ^(8){ }^{8} 中國醫藥大學安南醫院,台南,台灣, ^(9){ }^{9} 耳鼻喉神經科展望診所,高雄,台灣, ^(10){ }^{10} 國立中山大學生物醫學研究所,高雄,台灣, ^(11){ }^{11} 亞洲大學醫療衛生學院心理學系,台中,台灣、^(12){ }^{12} Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan, ^(13){ }^{13} Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Bei-Hu Branch, Taipei, Taiwan, ^(14){ }^{14} Center for Regional Anesthesia and Pain Medicine, Wang-Fang Hospital, Taipei Medical University, Taipei, Taiwan ^(12){ }^{12} 國立台灣大學醫院暨國立台灣大學醫學院物理醫學暨復健學系,台北,台灣, ^(13){ }^{13} 國立台灣大學醫院北湖分院物理醫學暨復健學系,台北,台灣, ^(14){ }^{14} 台北醫學大學王芳醫院區域麻醉暨疼痛醫學中心,台北,台灣
Coenzyme Q10 (CoQ10) is a popular nutritional supplement, an antioxidant and an essential component of the mitochondrial electron transport chain. Several clinical studies have suggested that fatigue can be reduced by antioxidant supplementation. However, the data on this topic has been sparse to date. Hence, we conducted this metaanalysis with the aim of investigating the effectiveness of fatigue reduction via CoQ10 supplementation. More specifically, we searched electronic databases for randomized controlled trials (RCTs) published from the database inception to January 2022. A random effects model was implemented to conduct the meta-analysis among 13 RCTs (with a total of 1,126 participants). As compared with the placebo groups evaluated in each RCT, the CoQ10 group showed a statistically significant reduction in fatigue scores (Hedges’ g=g=-0.398,95%-0.398,95 \% confidence interval =-0.641=-0.641 to -0.155,p=0.001-0.155, p=0.001 ). The directions of the treatment effects were consistent between the healthy and diseased participants. Compared with the placebo group, the effect of reducing fatigue was statistically significant in the subgroup using the CoQ10-only formulation but not in the subgroup using CoQ10 compounds. The results of our meta-regression demonstrate that increases in the daily dose (coefficient =-0.0017=-0.0017 per mg, p < 0.001p<0.001 ) and treatment duration (coefficient =-0.0042=-0.0042 per day, p=0.007p=0.007 ) of CoQ10 supplementation were correlated with greater fatigue reduction. There was only one adverse (gastrointestinal) event in the 602 participants who underwent the CoQ10 intervention. Based on the results of this meta-analysis, we conclude that CoQ10 is an effective and safe supplement for reducing fatigue symptoms. 輔酵素 Q10 (CoQ10) 是一種廣受歡迎的營養補充劑,是一種抗氧化劑,也是線粒體電子傳輸鏈的重要組成部分。數項臨床研究顯示,補充抗氧化劑可減少疲勞。然而,到目前為止,有關此主題的資料仍然稀少。因此,我們進行了這項彙總分析,目的是研究透過補充 CoQ10 來減少疲勞的效果。具體來說,我們在電子資料庫中搜尋了從資料庫開始到 2022 年 1 月期間所發表的隨機對照試驗 (RCT)。我們採用隨機效應模型對 13 項 RCT(共 1,126 名參與研究者)進行彙總分析。與每項 RCT 評估的安慰劑組相比,CoQ10 組顯示疲勞評分有統計上的顯著降低(Hedges' g=g=-0.398,95%-0.398,95 \% 置信區間 =-0.641=-0.641 至 -0.155,p=0.001-0.155, p=0.001 )。健康與患病參與者的治療效果方向一致。與安慰劑組相比,在使用純 CoQ10 配方的亞組中,減少疲勞的效果在統計學上是顯著的,但在使用 CoQ10 化合物的亞組中則不顯著。我們的元回歸結果顯示,增加 CoQ10 補充劑的每日劑量 (係數 =-0.0017=-0.0017 每毫克, p < 0.001p<0.001 ) 和治療時間 (係數 =-0.0042=-0.0042 每日, p=0.007p=0.007 ) 與更大的疲勞減輕效果相關。在 602 位接受 CoQ10 干預療程的參與者中,只有一位出現不良(腸胃)事件。根據這項薈萃分析的結果,我們的結論是 CoQ10 是一種有效且安全的補充劑,可減少疲勞症狀。
Fatigue is a symptom that occurs in both healthy and diseased individuals (Finsterer and Mahjoub, 2014). This symptom is described as unusual overwhelming tiredness that cannot be explained by physiological exhaustion in the wake of physical or mental efforts and that is not sufficiently recovered by regular rest and sleep (Haß et al., 2019). In the general population, the prevalence of temporary fatigue ranges from 4 to 45%45 \%, while that of chronic fatigue (i.e., fatigue lasting for > 6>6 months) ranges from 2 to 11%11 \% (Cathébras et al., 1992; Ridsdale et al., 1993; Jason et al., 1999; Cullen et al., 2002). Fatigue is also common in patients with poliomyelitis (Peel et al., 2015) and multiple sclerosis (Sanoobar et al., 2016; Moccia et al., 2019) as well as in cancer patients undergoing chemotherapy (Iwase et al., 2016). The annual total cost of productivity loss due to chronic fatigue syndrome in the United States alone is approximately US$ 9.1 billion, which is roughly equal to US$ 20,000 per resident (Reynolds et al., 2004). Although the etiology of fatigue remains poorly understood (Filler et al., 2014), mitochondrial dysfunction (Filler et al., 2014) and pro-inflammatory status (Haß et al., 2019) may play a role. Fortunately, fatigue can be rigorously measured and is potentially treatable (Finsterer and Mahjoub, 2014). 疲勞是一種症狀,不論是健康或患病的人都會出現(Finsterer and Mahjoub, 2014)。這種症狀被描述為不尋常的壓倒性疲勞,無法用生理疲勞來解釋體力或精神上的努力,也無法透過正常的休息和睡眠來充分恢復(Haß等人,2019)。在一般人口中,暫時性疲勞的發生率介於 4 到 45%45 \% 之間,而慢性疲勞 (即持續 > 6>6 個月的疲勞) 的發生率介於 2 到 11%11 \% 之間 (Cathébras 等人,1992;Ridsdale 等人,1993;Jason 等人,1999;Cullen 等人,2002)。疲勞也常見於小兒麻痺症 (Peel 等人,2015 年) 和多發性硬化症 (Sanoobar 等人,2016 年;Moccia 等人,2019 年) 患者,以及接受化療的癌症患者 (Iwase 等人,2016 年)。單在美國,每年因慢性疲勞症候群所造成的生產力損失總成本約為 91 億美元,大約等於每位居民 20,000 美元 (Reynolds 等人,2004)。雖然疲勞的病因仍不甚明了(Filler 等人,2014 年),但線粒體功能障礙(Filler 等人,2014 年)和促發炎狀態(Haß 等人,2019 年)可能扮演一定的角色。幸運的是,疲勞可以被嚴格測量,並且有可能被治療(Finsterer and Mahjoub, 2014)。
Coenzyme Q10 (CoQ10) is a popular nutritional supplement and a lipid-soluble antioxidant that is endogenously produced by the human body. It is also an essential component of the mitochondrial electron transport chain (Aaseth et al., 2021). Case-control studies conducted by Maes et al. showed that, as compared with healthy subjects, patients with chronic fatigue syndrome have lower plasma levels of CoQ10 (Maes et al., 2009a; Maes et al., 2009b). A statistically significant inverse relationship has also been found between CoQ10 levels and fatigue severity (Maes et al., 2009a). Thus, CoQ10 supplementation has been successfully applied for reducing fatigue in patients with various conditions, including chronic fatigue syndrome (Castro-Marrero et al., 2015; Castro-Marrero et al., 2016; Fukuda et al., 2016; Castro-Marrero et al., 2021) and fibromyalgia (Cordero et al., 2013; Miyamae et al., 2013; Di Pierro et al., 2017), as well as in healthy subjects (Morikawa et al., 2019; Mizuno et al., 2020). However, inconsistencies in clinical outcomes have been identified across different trials. Therefore, in the current study, we performed a systematic review and meta-analysis to investigate the effects of CoQ10 treatment on fatigue symptoms and syndromes. 輔酵素 Q10 (CoQ10) 是一種廣受歡迎的營養補充劑,也是一種由人體內分泌的脂溶性抗氧化劑。它也是線粒體電子傳輸鏈的重要成分 (Aaseth et al., 2021)。由 Maes 等人進行的病例對照研究顯示,與健康受試者相比,慢性疲勞症候群患者的血漿 CoQ10 含量較低(Maes 等人,2009a;Maes 等人,2009b)。在統計學上也發現 CoQ10 水準與疲勞嚴重程度有顯著的反比關係 (Maes 等人,2009a)。因此,CoQ10 補充劑已成功應用於減輕慢性疲勞症候群等各種病患的疲勞(Castro-Marrero et al、2016;Fukuda 等人,2016;Castro-Marrero 等人,2021)和纖維肌痛(Cordero 等人,2013;Miyamae 等人,2013;Di Pierro 等人,2017),以及健康受試者(Morikawa 等人,2019;Mizuno 等人,2020)。然而,在不同的試驗中發現了臨床結果的不一致。因此,在目前的研究中,我們進行了系統回顧和薈萃分析,以調查 CoQ10 治療對疲勞症狀和症候群的影響。
2 MATERIALS AND METHODS 2 材料與方法
2.1 General Guidelines 2.1 一般指引
We followed the guidelines delineated in the latest version of the PRISMA 2020 guidelines (Supplementary Table S1) to conduct this meta-analysis (Page et al., 2021a). This study, which was registered in INPLASY with the registration number 我們遵循最新版的 PRISMA 2020 指導方針(補充表 S1)進行此項 meta 分析(Page 等人,2021a)。本研究在 INPLASY 中註冊,註冊編號為
INPLASY202210113 (Tsai and Chang, 2022), did not require ethics review board approval or participant informed consent. INPLASY202210113 (Tsai and Chang, 2022),不需要倫理審查委員會批准或受試者知情同意。
2.2 Database Searches and the Identification of Eligible Manuscripts 2.2 資料庫檢索與合格手稿的鑑定
Two authors (I-CT and K-VC) conducted independent electronic searches in the PubMed, Embase, Cochrane CENTRAL, Web of Science, and ClinicalTrials.gov databases using the following keywords (“Q10” OR “Q 10” OR “CoQ10” OR “Coenzyme Q10” OR “ubiquinol-10” OR “ubiquinol” OR “ubiquinone”) AND (“fatigue” OR “chronic fatigue syndrome” OR “tiredness”). The search was conducted from the inception of each database (i.e., the earliest record) to the date of the database search (16 January 2022). We note that ubiquinone is the fully oxidized form of CoQ10, and ubiquinol is the reduced form. These two forms are continually interconverted in the body and have similar bioactivities (Mantle and Dybring, 2020). The detailed search strategy for this systematic review and meta-analysis is provided in the Supplementary Material (Supplementary Table S2). 兩位作者(I-CT 和 K-VC)使用下列關鍵字("Q10" OR "Q 10" OR "CoQ10" OR "Coenzyme Q10" OR 「泛醌醇-10」 OR 「泛醌」 OR 「泛醌酮」)和(「疲勞」 OR 「慢性疲勞症候群」 OR 「疲勞」)在 PubMed、Embase、Cochrane CENTRAL、Web of Science 和 ClinicalTrials.gov 資料庫中進行獨立的電子檢索。搜尋時間為每個資料庫開始(即最早記錄)至資料庫搜尋日期(2022 年 1 月 16 日)。我們注意到泛醌是 CoQ10 的完全氧化形式,而泛醇是還原形式。這兩種形式在人體中不斷相互轉換,具有類似的生物活性(Mantle and Dybring, 2020)。本系統性文獻回顧與薈萃分析的詳細搜尋策略請參閱補充資料(補充表 S2)。
Initially, the two authors responsible for conducting this search screened the identified titles and abstracts for eligibility through a consensus process. The PubMed and EMBASE databases were thoroughly scrutinized for any potentially eligible trials. We also checked the reference lists of an identified review article (Mehrabani et al., 2019) and performed additional manual searches. A third reviewer and study author (P-TT) was consulted for situations in which the two aforementioned authors could not reach a consensus. No language restrictions were applied to this search. 最初,負責進行這項檢索的兩位作者透過共識程序篩選出符合條件的標題和摘要。我們徹底檢查了 PubMed 和 EMBASE 資料庫中任何可能符合條件的試驗。我們還檢查了一篇已識別的評論文章(Mehrabani 等人,2019 年)的參考清單,並進行了額外的人工檢索。在上述兩位作者無法達成共識的情況下,我們徵詢了第三位審稿人兼研究作者 (P-TT) 的意見。本檢索並無語言限制。
2.3 Inclusion and Exclusion Criteria 2.3 納入與排除標準
The PICO (population, intervention, comparison, outcome) setting of the current meta-analysis was as follows: P: human participants; I: CoQ10 supplementation; C: placebo; and O: changes in fatigue symptom scores. 目前薈萃分析的 PICO(人口、干預、比較、結果)設定如下:P:人類參與者;I:CoQ10補充劑;C:安慰劑;O:疲勞症狀評分的變化。
The following inclusion criteria were used: 1) randomized controlled trials (RCTs) enrolling human participants, 2) RCTs investigating the quantitative evaluation of fatigue symptoms before and after CoQ10 supplementation, 3) placebo-controlled trials (without age or treatment duration limitations), and 4) trials with available data for pre- and post-intervention fatigue assessments or evaluations of changes in fatigue scores. Open-label studies were also included in this meta-analysis as recent studies have found that open-label placebos had similar efficacy to double-blind placebos (Lembo et al., 2021; von Wernsdorff et al., 2021). 採用下列納入標準:1)招募人類參與者的隨機對照試驗 (RCT);2)調查 CoQ10 補充前後疲勞症狀定量評估的 RCT;3)安慰劑對照試驗(無年齡或療程限制);4)有干預前後疲勞評估或疲勞分數變化評估資料的試驗。由於最近的研究發現開放標籤安慰劑的療效與雙盲安慰劑相似,因此開放標籤研究也被納入本彙總分析中 (Lembo et al., 2021; von Wernsdorff et al., 2021)。
The exclusion criteria for this review and meta-analysis were as follows: 1) non-RCTs, 2) studies focusing on athletic muscle exhaustion rather than generalized fatigue, 3) studies lacking a placebo-controlled group, 4) studies lacking quantitative assessments of fatigue, and 5) studies enrolling participants that overlapped with a previously published trial. 本檢討與薈萃分析的排除標準如下:1) 非 RCT 研究;2) 著重於運動肌肉疲勞而非全身性疲勞的研究;3) 缺乏安慰劑對照組的研究;4) 缺乏疲勞量化評估的研究;以及 5) 參與者與先前已發表的試驗重疊的研究。
2.4 Methodological Quality Appraisal 2.4 方法品質評估
To investigate the methodological quality of the evaluated studies, we used the Cochrane risk of bias tool for randomized trials (version 2, RoB 2, London, United Kingdom), which consists of six main items for evaluating study quality: the randomization process, intervention adherence, missing outcome data, outcome measurement, selective reporting, and the overall risk of bias (Sterne et al., 2019). 為了調查所評估研究的方法學品質,我們使用了隨機試驗的 Cochrane 偏倚風險工具 (第 2 版,RoB 2,英國倫敦),該工具包含六個主要的研究品質評估項目:隨機化過程、干預依從性、遺失結果資料、結果測量、選擇性報告以及整體偏倚風險 (Sterne et al., 2019)。
In the intervention adherence section of the RoB 2, there are two options presented for literature assessment: intention-totreat (intervention assignment) and per-protocol (intervention adherence). In this meta-analysis, we chose the per-protocol evaluation (Sterne et al., 2019) since it fits best with the design of our included studies. 在 RoB 2 的干預依從性部分,文獻評估有兩個選項:意向治療(干預指派)和按方案(干預依從性)。在本薈萃分析中,我們選擇了按協議評估(Sterne 等人,2019),因為它最符合我們所納入研究的設計。
The primary outcomes evaluated in this investigation were changes in fatigue scores following CoQ10 supplementation or placebo regimens. We also examined the validity and appropriateness of the fatigue scale used in each trial (Fisk et al., 1994; Chandran et al., 2007; Fukuda et al., 2008). If there was more than one scoring system for fatigue evaluation implemented in a single trial, the index test included in the meta-analysis was decided by author consensus (I-CT and K-VC\mathrm{K}-\mathrm{VC} ). 本研究評估的主要結果是 CoQ10 補充劑或安慰劑療程後疲勞分數的變化。我們也檢視了每項試驗所使用的疲勞量表的有效性與適當性 (Fisk 等人,1994;Chandran 等人,2007;Fukuda 等人,2008)。如果在單一試驗中有超過一種疲勞評估計分系統,則納入薈萃分析的指標測試由作者共識決定 (I-CT 和 K-VC\mathrm{K}-\mathrm{VC} )。
The secondary outcome evaluated in this investigation was the treatment-associated adverse event rate. For cells with zero events, zero was replaced by 0.5 to enable calculation (Deeks et al., 2021). The aforementioned outcomes were quantified using odds ratios. 本研究評估的次要結果為治療相關的不良事件率。對於事件率為零的細胞,以 0.5 取代零以進行計算 (Deeks et al., 2021)。上述結果使用機率比進行量化。
2.7 Data Extraction and Management 2.7 資料擷取與管理
Two independent authors (I-CT and K-VC) extracted data from the evaluated studies, including demographic data, study design parameters, details of the administered CoQ10 and placebo regimens, and the primary and secondary outcome values. To avoid misinterpretation, the evaluators paid special attention to the effect direction of the scale used in each trial. In situations where data were unavailable within the published articles, we contacted the corresponding authors to obtain the original data. 兩位獨立作者(I-CT 和 K-VC)擷取所評估研究的資料,包括人口統計資料、研究設計參數、施用 CoQ10 和安慰劑方案的細節,以及主要和次要結果數值。為避免誤解,評估人員特別注意每項試驗所用量表的效應方向。當發表的文章中沒有資料時,我們會聯絡對應的作者以取得原始資料。
Data extraction and conversion as well as merging the results from various study arms using different CoQ10 dosages were processed according to the recommendations of the Cochrane Handbook for Systematic Reviews of Interventions and the associated medical literature (Hozo et al., 2005; Higgins et al., 2021a; Higgins et al., 2021b). If post-treatment data were available at multiple time points, we extracted the outcome reported at the end of the intervention for statistical analysis. For crossover studies, we included only the first study interval to avoid carry-over effects (Higgins et al., 2021a). 資料擷取與轉換,以及合併使用不同 CoQ10 劑量的不同研究臂的結果,都是依照 Cochrane 手冊中關於干預系統性評估及相關醫學文獻的建議處理 (Hozo 等人,2005;Higgins 等人,2021a;Higgins 等人,2021b)。如果有多個時間點的治療後資料,我們會擷取干預結束時所報告的結果進行統計分析。對於交叉研究,我們只包括第一個研究間期,以避免攜帶效應 (Higgins 等人,2021a)。
2.8 Statistical Analyses 2.8 統計分析
Because of the heterogeneity of the target populations within the enrolled studies, the current meta-analysis was conducted with a random-effects model (Borenstein et al., 2009) implemented using Comprehensive Meta-Analysis software (version 3, Biostat, Englewood, NJ, United States). A two-tailed pp value of less than 0.05 was considered statistically significant. 由於入選研究的目標人群具有異质性,因此本 meta 分析採用 Comprehensive Meta-Analysis 軟體 (version 3, Biostat, Englewood, NJ, United States) 的隨機效果模型 (Borenstein 等人,2009 年) 進行。小於 0.05 的雙尾 pp 值被視為具有統計意義。
We used Hedges’ gg and 95%95 \% confidence intervals (CIs) to quantify the primary study outcomes (i.e., changes in fatigue scores). Hedges’ gg values of 0.2,0.50.2,0.5, and 0.8 were considered small, moderate, and large effect sizes, respectively (Hedges, 1981). Odds ratios (ORs) and their associated 95% CIs were evaluated to investigate secondary outcomes (i.e., treatmentassociated adverse event rates). 我們使用 Hedges 的 gg 和 95%95 \% 置信區間 (CI) 來量化主要研究結果(即疲勞分數的變化)。Hedges的 gg 值 0.2,0.50.2,0.5 ,和0.8分別被認為是小、中和大的效應量(Hedges,1981)。對於次要結果(即治療相關的不良事件率),則評估了比值比 (OR) 及其相關的 95% CI。 I^(2)I^{2} and Cochran’s QQ statistics were also examined to evaluate the degree of heterogeneity across studies. I^(2)I^{2} values of 25,50 , and 75%75 \% were considered low, moderate, and high heterogeneity, I^(2)I^{2} 和 Cochran's QQ 統計也被檢驗以評估各研究之間的異质性程度。 I^(2)I^{2} 值為 25、50 和 75%75 \% 被視為低度、中度和高度異质性、
FIGURE 1 | PRISMA 2020 flowchart for the current meta-analysis. 圖 1 | 目前薈萃分析的 PRISMA 2020 流程圖。
- Isfahan University of Medical Sciences - 伊斯法罕醫學大學
(2020)
with fatigue 疲勞
Placebo: 45/6 安慰劑:45/6
35.7+-8.935.7 \pm 8.9
double-blind 双盲
double-blinded 雙盲
Castro-Marrero
Spain 西班牙
Chronic fatigue syndrome 慢性疲勞症候群
CoQ10+NADH: 72/0 ^("c "){ }^{\text {c }}
45.38+-7.81^("c ")45.38 \pm 7.81^{\text {c }}
RCT, RCT、
Independent 獨立
Random number 隨機號碼
- Vitae Health Innovation - 維他健康創新
(2021)
Placebo: 72/0 安慰劑:72/0
46.79+-6.4846.79 \pm 6.48
double-blind 双盲
investigator 調查員
- Vall d'Hebron Hospital - Vall d'Hebron 醫院
Research Institute 研究所
" Peel
(2015)" Australia Poliomyelitis " CoQ10: 39//15^(b,d)
Placebo: 32//17" "69.9+-8.4^(b)
69.8+-8.2" RCT, double-blind Coordination center Matrix sequence - Cancer and Polio Research Fund (UK)
Sanoobar Iran Multiple sclerosis CoQ10: 20/2 ^("c ") 33.1+-7.6^("c ") RCT, Not mentioned Not mentioned - Tehran University of Medical Sciences
(2016) Placebo: 21/2 30.9+-7.7 double-blind
Di Pierro Italy Fibromyalgia CoQ10: 12/0 ^("b,c ") 52.5+-10.4^(b,c) RCT, Coin tossing Coin tossing N/A
(2017) Placebo: 10/0 53.6+-7.8 open-label
Morikawa Japan Healthy subjects CoQ10: 16/14 ^("b ") 40.5+-7.3^("b ") RCT, Not mentioned Stratified block - Kaneka, Inc.
(2019) Placebo: 16/14 42.9+-7.3 double-blind
Mizuno Japan Healthy subjects with fatigue CoQ10: 28/14 ^("b,c ") 42.1+-10.9^("b,c ") RCT, Not mentioned Stratified - Kaneka, Inc.
(2020) Placebo: 13/7 41.3+-13.4 double-blind - Japan Science and Technology Agency
Mousavi Iran Health subjects (nurses) CoQ10: 47/7 ^(@) 35.1+-8.1^("c ") RCT, Assignment Permuted block - Isfahan University of Medical Sciences
(2020) with fatigue Placebo: 45/6 35.7+-8.9 double-blind double-blinded
Castro-Marrero Spain Chronic fatigue syndrome CoQ10+NADH: 72/0 ^("c ") 45.38+-7.81^("c ") RCT, Independent Random number - Vitae Health Innovation
(2021) Placebo: 72/0 46.79+-6.48 double-blind investigator - Vall d'Hebron Hospital
Research Institute| $\begin{aligned} & \text { Peel } \\ & (2015) \end{aligned}$ | Australia | Poliomyelitis | $\begin{aligned} & \text { CoQ10: } 39 / 15^{\mathrm{b}, \mathrm{~d}} \\ & \text { Placebo: } 32 / 17 \end{aligned}$ | $\begin{aligned} & 69.9 \pm 8.4^{b} \\ & 69.8 \pm 8.2 \end{aligned}$ | RCT, double-blind | Coordination center | Matrix sequence | - Cancer and Polio Research Fund (UK) |
| :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
| Sanoobar | Iran | Multiple sclerosis | CoQ10: 20/2 ${ }^{\text {c }}$ | $33.1 \pm 7.6^{\text {c }}$ | RCT, | Not mentioned | Not mentioned | - Tehran University of Medical Sciences |
| (2016) | | | Placebo: 21/2 | $30.9 \pm 7.7$ | double-blind | | | |
| Di Pierro | Italy | Fibromyalgia | CoQ10: 12/0 ${ }^{\text {b,c }}$ | $52.5 \pm 10.4^{\mathrm{b}, \mathrm{c}}$ | RCT, | Coin tossing | Coin tossing | N/A |
| (2017) | | | Placebo: 10/0 | $53.6 \pm 7.8$ | open-label | | | |
| Morikawa | Japan | Healthy subjects | CoQ10: 16/14 ${ }^{\text {b }}$ | $40.5 \pm 7.3^{\text {b }}$ | RCT, | Not mentioned | Stratified block | - Kaneka, Inc. |
| (2019) | | | Placebo: 16/14 | $42.9 \pm 7.3$ | double-blind | | | |
| Mizuno | Japan | Healthy subjects with fatigue | CoQ10: 28/14 ${ }^{\text {b,c }}$ | $42.1 \pm 10.9^{\text {b,c }}$ | RCT, | Not mentioned | Stratified | - Kaneka, Inc. |
| (2020) | | | Placebo: 13/7 | $41.3 \pm 13.4$ | double-blind | | | - Japan Science and Technology Agency |
| Mousavi | Iran | Health subjects (nurses) | CoQ10: 47/7 ${ }^{\circ}$ | $35.1 \pm 8.1^{\text {c }}$ | RCT, | Assignment | Permuted block | - Isfahan University of Medical Sciences |
| (2020) | | with fatigue | Placebo: 45/6 | $35.7 \pm 8.9$ | double-blind | double-blinded | | |
| Castro-Marrero | Spain | Chronic fatigue syndrome | CoQ10+NADH: 72/0 ${ }^{\text {c }}$ | $45.38 \pm 7.81^{\text {c }}$ | RCT, | Independent | Random number | - Vitae Health Innovation |
| (2021) | | | Placebo: 72/0 | $46.79 \pm 6.48$ | double-blind | investigator | | - Vall d'Hebron Hospital |
| | | | | | | | | Research Institute |
respectively (Higgins et al., 2003). We likewise performed subgroup analyses based on disease and CoQ10 formulations. Meta-regression analyses regarding the treatment effects of daily CoQ10 doses as well as evaluations of various treatment durations were conducted to determine whether the fatigue-alleviating effects of CoQ10 correlated with the aforementioned parameters. (Higgins 等人,2003)。同樣地,我們也根據疾病和 CoQ10 配方進行了亞組分析。我們對每日 CoQ10 劑量的治療效果進行了元回歸分析,並評估了各種治療持續時間,以確定 CoQ10 的消除疲勞效果是否與上述參數相關。
To confirm the robustness of this meta-analysis, sensitivity analyses were performed using the one-study removal method to determine whether there was a statistically significant change in the summary effect size after removing a particular trial from the analysis (Deeks et al., 2021). 為了確認這項薈萃分析的穩健性,我們使用剔除單一研究的方法進行敏感性分析,以確定從分析中剔除特定試驗後,總結效應大小是否有統計上的顯著變化 (Deeks 等人,2021)。
Potential publication bias was evaluated using guidelines set forth by the Cochrane Handbook for Systematic Reviews of Interventions (Page et al., 2021b). Funnel plots were generated and visually inspected. Egger’s regression tests were implemented when 10 or more datasets were available. 使用 Cochrane Handbook for Systematic Reviews of Interventions (Page et al., 2021b)提出的準則評估可能的出版偏差。產生漏斗圖並進行目視檢查。當有 10 個或以上的資料集時,則進行 Egger 回歸測試。
3 RESULTS 3 結果
3.1 Study Identification and Selection 3.1 研究的識別與選擇
The PRISMA flowchart for the literature search is shown in Figure 1. After removing duplicate articles and excluding nonrelevant articles by an examination of titles and abstracts, we ultimately included 13 RCTs in the final analysis (Berman et al., 2004; Lee et al., 2011; Cordero et al., 2013; Lesser et al., 2013; Castro-Marrero et al., 2015; Fukuda et al., 2015; Peel et al., 2015; Sanoobar et al., 2016; Di Pierro et al., 2017; Morikawa et al., 2019; Mizuno et al., 2020; Mousavi et al., 2020; Castro-Marrero et al., 2021). The articles excluded in the final stage and the reasons for exclusion are listed in Supplementary Table S3 (Singh et al., 2003; Langsjoen et al., 2005; Kumar et al., 2007; Mizuno et al., 2008; Gökbel et al., 2010; Cordero et al., 2012a; Cordero et al., 2012b; Fedacko et al., 2013; Gharahdaghi et al., 2013; Miyamae et al., 2013; Castro-Marrero et al., 2016; Fukuda et al., 2016; Iwase et al., 2016; Menon et al., 2017; Langsjoen et al., 2019; Moccia et al., 2019; Negro et al., 2019; Gomez-Centeno et al., 2020; Schweiger et al., 2020; Suzuki et al., 2021). Details of data extraction from included randomized controlled trials are summarized in Supplementary Table S4. 文獻檢索的 PRISMA 流程圖如圖 1 所示。在刪除重複文章並透過檢視標題和摘要排除不相關的文章後,我們最終在最後分析中納入了 13 篇 RCT(Berman 等人,2004;Lee 等人,2011;Cordero 等人、2013;Lesser等人,2013;Castro-Marrero等人,2015;Fukuda等人,2015;Peel等人,2015;Sanoobar等人,2016;Di Pierro等人,2017;Morikawa等人,2019;Mizuno等人,2020;Mousavi等人,2020;Castro-Marrero等人,2021)。最後階段排除的文章及排除原因列於補充表格 S3 (Singh et al., 2003; Langsjoen et al., 2005; Kumar et al., 2007; Mizuno et al., 2008; Gökbel et al., 2010; Cordero et al., 2012a; Cordero et al., 2012b; Fedacko et al、2013;Gharahdaghi等人,2013;Miyamae等人,2013;Castro-Marrero等人,2016;Fukuda等人,2016;Iwase等人,2016;Menon等人,2017;Langsjoen等人,2019;Moccia等人,2019;Negro等人,2019;Gomez-Centeno等人,2020;Schweiger等人,2020;Suzuki等人,2021)。從納入的隨機對照試驗中萃取資料的細節總結於補充表格 S4。
The 13 eligible RCTs encompassed a total of 1,126 participants with a mean age of 49.3+-12.649.3 \pm 12.6 (standard deviation) years, of whom 25.6%(n=288)25.6 \%(n=288) were male. The study duration ranged from four (Mousavi et al., 2020) to 24 weeks (Lesser et al., 2013). Subject diagnoses included chronic fatigue syndrome (CastroMarrero et al., 2015; Castro-Marrero et al., 2021), fibromyalgia (Cordero et al., 2013; Di Pierro et al., 2017), end-stage heart failure (Berman et al., 2004), obesity (Lee et al., 2011), breast cancer (with patients undergoing chemotherapy) (Lesser et al., 2013), end-stage renal disease (Fukuda et al., 2015), poliomyelitis (Peel et al., 2015), and multiple sclerosis (Sanoobar et al., 2016), and we also evaluated healthy subjects (Morikawa et al., 2019) and healthy individuals with fatigue (Mizuno et al., 2020; Mousavi et al., 2020). The details of the retrieved trials are summarized in Table 1. 13 項符合條件的 RCT 共涵蓋 1,126 名平均年齡 49.3+-12.649.3 \pm 12.6 (標準差)歲的參與者,其中 25.6%(n=288)25.6 \%(n=288) 為男性。研究時間從 4 週 (Mousavi 等人,2020) 到 24 週 (Lesser 等人,2013) 不等。受試者診斷包括慢性疲勞症候群 (CastroMarrero 等人,2015;Castro-Marrero 等人,2021)、纖維肌痛 (Cordero 等人,2013;Di Pierro 等人,2017)、末期心臟衰竭 (Berman 等人,2004)、肥胖症 (Lee 等人,2011)、乳癌 (接受化療的患者) (Lesser 等人、2013)、末期腎臟疾病(Fukuda 等人,2015)、小兒麻痺症(Peel 等人,2015)和多發性硬化症(Sanoobar 等人,2016),我們也評估了健康受試者(Morikawa 等人,2019)和疲勞的健康個體(Mizuno 等人,2020;Mousavi 等人,2020)。表 1 歸納了檢索到的試驗詳情。
Three studies evaluated compounds mixed with CoQ10. More specifically, CoQ10 with a reduced form of nicotinamide adenine 三項研究評估了與 CoQ10 混合的化合物。更明顯的是,CoQ10 與還原形式的煙醯胺腺嘌呤
dinucleotide (NADH) was evaluated in two of these trials (CastroMarrero et al., 2015; Castro-Marrero et al., 2021) and CoQ10 in a multi-vitamin nutritional drink was evaluated in the other trial (Fukuda et al., 2015). Ten studies evaluated CoQ10 only (Berman et al., 2004; Lee et al., 2011; Cordero et al., 2013; Lesser et al., 2013; Peel et al., 2015; Sanoobar et al., 2016; Di Pierro et al., 2017; Morikawa et al., 2019; Mizuno et al., 2020; Mousavi et al., 2020). The intervention details, tools for fatigue assessment, adverse events, and study withdrawals are summarized in Table 2. 二核苷酸 (NADH) 在其中兩項試驗中進行評估 (CastroMarrero 等人,2015 年;Castro-Marrero 等人,2021 年),而在另一項試驗中則評估了多種維生素營養飲料中的 CoQ10 (Fukuda 等人,2015 年)。10 項研究僅評估 CoQ10(Berman 等人,2004;Lee 等人,2011;Cordero 等人,2013;Lesser 等人,2013;Peel 等人,2015;Sanoobar 等人,2016;Di Pierro 等人,2017;Morikawa 等人,2019;Mizuno 等人,2020;Mousavi 等人,2020)。表 2 總結了干預細節、疲勞評估工具、不良事件和研究退出情況。
3.2 Methodological Quality of the Included Studies 3.2 所納入研究的方法論品質
With respect to the overall methodological quality of the included studies, we found that 46.2%46.2 \% of the evaluated studies had a low risk of bias, 53.8%53.8 \% had some risk of bias, and 0%0 \% had a high risk of bias (Figure 2). In a detailed assessment, seven studies (Lee et al., 2011; Cordero et al., 2013; Lesser et al., 2013; Castro-Marrero et al., 2015; Sanoobar et al., 2016; Morikawa et al., 2019; Mizuno et al., 2020) were rated as having “some” risk of bias in the randomization process because they did not reveal details of the allocation concealment. One study (Lee et al., 2011) was rated as having “some” risk of bias with regard to missing outcome data, since the study excluded five subjects from the CoQ10 group due to an unchanged level of serum CoQ10 after supplementation. One study (Di Pierro et al., 2017) was rated as having “some” risk of bias in the outcome measurement because it was an open-label study and the participants were aware of the interventions they received. The details of the risk of bias assessment are summarized in Table 3. 就納入研究的整體方法學品質而言,我們發現 46.2%46.2 \%