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. 2023 Oct 2;10:1223677. doi: 10.3389/fcvm.2023.1223677

Effects of traditional Chinese exercises on cardiac rehabilitation in patients with myocardial infarction: a meta-analysis of randomized controlled trials

Jingfang Zhang 1, Jieqiong Weng 1, Mengfei Yuan 1, Xingchen Shen 1, Yayi Weng 1, Xiaoxu Shen 1,*
PMCID: PMC10577298  PMID: 37849938

Abstract

Objective

Traditional Chinese exercises (TCE) are excellent cardiac rehabilitation (CR) training that can effectively improve cardiorespiratory fitness. However, there is no published meta-analysis of TCE on CR in patients with myocardial infarction (MI). Therefore, this study aimed to provide a comprehensive evaluation from multiple perspectives.

Methods

This meta-analysis is based on the Cochrane Handbook of Systematic Reviews. Eight databases were searched from the date of database construction to March 15, 2023. Two investigators independently screened the literature and assessed their quality. The meta-analysis was performed with RevMan5.4 software.

Results

A total of 21 articles involving 1,890 patients were included. N-terminal pro-brain natriuretic peptide (NT-proBNP) in the TCE group were lower than the control group (MD = −96.34, 95%CI: −140.69 ∼−51.98, P < 0.00001, I2 = 96%), the left ventricular ejection fraction (LVEF) in the TCE group was higher than the control group (MD = 4.58, 95%CI: 3.28–5.88, P < 0.00001, I2 = 79%), the left ventricular end diastolic dimension (LVDD) in TCE group was lower than the control group (MD = −3.83, 95%CI: −5.27 ∼−2.38, P < 0.00001, I2 = 94%), the left ventricular end systolic diameter (LVESD) in TCE group was lower than the control group (MD = −2.17, 95%CI: −4.10 ∼−0.24, P < 0.00001, I2 = 96%), The 6-minute walk test (6MWT) in the TCE group was higher than the control group (MD = 69.60, 95%CI: 34.59–104.60, P < 0.00001, I2 = 99%), the oxygen uptake (VO2) in the TCE group was higher than the control group (MD = 4.38, 95%CI: 2.25–6.51, P < 0.00001, I2 = 94%), the 36-item short form survey (SF-36) in the TCE group was higher than the control group (MD = 13.34, 95%CI: 9.25–17.42, P = 0.008, I2 = 75%), the Hamilton Anxiety Scale (HAMA) in the TCE group was lower than the control group (MD = −4.34, 95%CI: −5.18 ∼−3.50, P = 1.00, I2 = 0%), the Hamilton Depression Scale (HAMD) in the TCE group was lower than the control group (MD = −3.48, 95%CI: −5.35 ∼−1.61, P = 0.0002, I2 = 88%), the incidence of major adverse cardiac events (MACEs) in the TCE group was lower than the control group (RR = 0.31, 95%CI: 0.20–0.47, P = 0.52, I2 = 0%). Subgroup analysis revealed differences in TCE types could be a potential source of heterogeneity.

Conclusion

MI patients who used TCE have not only notable improvements in cardiopulmonary function, physical function, quality of life, and emotions but also reduced the incidence of MACEs. Tai Chi might be more efficient than Ba Duan Jin.

Systematic Review Registration

https://www.crd.york.ac.uk/PROSPERO/, identifier CRD42023408675.

Keywords: traditional Chinese exercise, tai chi, ba duan jin, cardiac rehabilitation, myocardial infarction, meta-analysis

1. Introduction

Cardiovascular disease (CVD) accounts for a large proportion of a range of non-communicable diseases. Acute myocardial infarction (AMI), one of the primary causes of death from coronary heart disease (CHD) (1), affects approximately 11.39 million individuals in China, where the prevalence of CVD is continually rising (2). The usual treatment for AMI often involves percutaneous coronary intervention (PCI) and coronary artery bypass grafting (CABG), which can enhance the quality of life for myocardial infarction (MI) patients by restoring perfusion. However, how to recover the pre-morbid health status remains an urgent public health issue (2). Cardiac rehabilitation (CR) is a comprehensive multidisciplinary program specifically designed for patients with CVD. The main objectives are to increase daily function and lessen cardiovascular risk factors (3). The European Society of Cardiology, American Heart Association, and American College of Cardiology all suggest utilizing CR as a Class I standard of care following an AMI (4).

Traditional Chinese Exercise (TCE) is a type of therapeutic, aerobic, mind-body exercise that has a history dating back over 3,000 years from traditional Chinese medicine (5). TCE mainly includes Tai Chi, Ba Duan Jin, Qi Gong, Yi Jin Jing, Wu Qin Xi, and other low to medium-intensity exercises (6). As a mild muscle-strengthening sport, TCE combines spiritual meditation with moderate postures, musculoskeletal stretching, and deep breathing (7, 8). It has been shown in numerous studies to be an effective exercise for CR and to enhance cardiorespiratory health (9, 10).

Early and appropriate CR not only improves cardiac function and quality of life but also prognosis in MI patients. However, there is no published meta-analysis evaluating the effect of TCE in these patients. Accordingly, the purpose of this study is to systematically evaluate the effects from multiple perspectives and provide a resource for future clinical advice.

2. Materials and methods

The Cochrane Handbook of Systematic Reviews served as the foundation for our meta-analysis. The results of this study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. This meta-analysis has been registered in PROSPERO (registration number: CRD42023408675).

2.1. Search strategy

The relevant literature published in Pubmed, Web of Science, Cochrane Library, Embase, China Knowledge Network (CNKI), Vipshop database (VIP), Wanfang Knowledge Service Platform, and Sinomed Database from inception to March 15, 2023, were searched. The following search terms were utilized: (((((((traditional Chinese exercise [Title/Abstract]) OR (tai chi [Title/Abstract])) OR (tai ji [Title/Abstract])) OR (ba duan jin [Title/Abstract])) OR (yi jin jing [Title/Abstract])) OR (wu qin xi [Title/Abstract])) OR (qi gong [Title/Abstract])) AND (myocardial infarction [Title/Abstract]) AND (randomized [Title/Abstract]).

2.2. Study eligibility

Inclusion criteria: (1) The type of study is a randomized controlled trial (RCT). (2) The subjects were patients with a definite diagnosis of MI. (3) The intervention in the treatment group was TCE, such as Tai Chi, Ba Duan Jin, Qi Gong, Wu Qin Xi, or Yi Jin Jing. (4) The control group received conventional treatment or other exercises. (5) The effectiveness outcomes included N-terminal pro-brain natriuretic peptide (NT-proBNP), left ventricular ejection fraction (LVEF), left ventricular end diastolic dimension (LVDD), left ventricular end systolic diameter (LVESD), 6-minute walk test (6MWT), oxygen uptake(VO2), the 36-item short form survey (SF-36), Hamilton Depression Scale (HAMD), Hamilton Anxiety Scale (HAMA) and major adverse cardiac events (MACEs).

Exclusion criteria: (1) Duplicate literature. (2) Animal experiments, meta-analyses, and systematic reviews. (3) Studies with insufficient data, such as those in which the data could not be combined with other outcome indicators.

2.3. Data extraction

Two investigators independently screened the retrieved literature. Firstly, eliminate duplicate publications. Then read titles and abstracts to exclude the literature not relevant to the topic. Finally read the full text to identify whether the literature met the inclusion criteria and establish the information base, including author, country, year of publication, general information, interventions, outcomes, and indicators for conducting the quality evaluation. Discrepancies between investigators were resolved by discussion or a third independent reviewer.

2.4. Quality assessment

Cochrane Handbook (11) was used to assess the quality of the included literature for random sequence generation, allocation concealment, blinding, incomplete outcome data, selective reporting, and other biases. Each entry was evaluated for one of low risk, high risk, and unclear risk.

2.5. Statistical analysis

The meta-analysis was performed with the RevMan5.4 software. Dichotomous variables were expressed as relative risk (RR) and 95% confidence interval (CI), and continuous variables were expressed as mean difference (MD) and 95% CI. I2 was used to determine the heterogeneity. Meta-analysis was conducted using the fixed-effects model if P > 0.1 and I2 < 50%. Meta-analysis was conducted using the random-effects model if P ≤ 0.1 and I2 ≥ 50%. Sensitivity analysis and subgroup analysis were used to examine the source of heterogeneity. The publication bias was displayed in a funnel plot. The test level of the meta-analysis was set as α = 0.05.

3. Results

3.1. Search results and population characteristics

The study screening process is illustrated in Figure 1. A total of 258 articles were searched through the databases (21 from Pubmed, 28 from Web of Science, 20 from Embase, 29 from Cochrane Library, 48 from CNKI, 33 from Wan Fang, 49 from VIP, and 30 from Sinomed). After removing duplicates and screening, 21 articles revolving 1,890 patients were eligible for meta-analysis. The general characteristics are summarized in Table 1. According to the table, 17 studies were from China and one was from Brazil. Interventions included Ba Duan Jin, Tai Chi Quan, and Tai Chi Ball. Intervention duration ranged from two weeks to one year.

Figure 1.

Figure 1

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Flow chart of the search strategy.

Table 1.

Characteristics of the clinical trials included in the meta-analysis.

Number Study Country Patients n (T/C) Age (T/C, years old) Intervention (T/C) Duration Outcomes
1 Wang et al. (12) China AMI 75/75 59.3 ± 15.4/58.8 ± 12.5 CT and Ba Duan Jin/CT and conventional exercise 6 months ①③④⑤⑩
2 Cai et al. (13) China AMI 45/45 49.58 ± 9.41/49.47 ± 9.32 CT and Ba Duan Jin/CT 2 weeks ⑤⑥
3 Wang et al. (14) China AMI 40/40 59.54 ± 14.78/58.65 ± 17.38 CT and Ba Duan Jin/CT 2 weeks ⑦
4 Zhang et al. (15) China AMI 35/35 59.42 ± 7.022/58.65 ± 7.027 CT and Ba Duan Jin/CT 8 weeks ①②
5 Zhou et al. (16) China AMI 50/50 57.87 ± 4.61/58.41 ± 4.52 CT and Ba Duan Jin/CT 3 months ①③④⑤
6 Zong et al. (17) China AMI 50/50 57.26 ± 6.84/56.91 ± 7.34 CT and Ba Duan Jin/CT 2 weeks ①③④⑥⑦⑩
7 Kang et al. (18) China AMI 30/30 51.27 ± 10.62/51.33 ± 9.95 CT and Ba Duan Jin/CT 2 months ①③⑤⑧⑨
8 Liu et al. (19) China STEMI 30/30 56.21 ± 10.44/57.32 ± 11.36 CT and Ba Duan Jin/CT 12 weeks ①②⑤
9 Guo and Jia (20) China AMI 60/60 58.21 ± 8.12/58.01 ± 9.54 CT and Ba Duan Jin + Tai Chi Ball/CT 1 month ①②⑨⑩
10 Li (21) China AMI 30/30 60.33 ± 12.34/60.13 ± 9.78 CT and Ba Duan Jin + Tai Chi Ball/CT 2 months ①②⑥⑧⑨
11 Yang (22) China AMI 69/69 63.19 ± 5.62/64.11 ± 5.64 CT and Tai Chi Ball/CT 4 weeks ⑥
12 Yu et al. (23) China AMI 32/32 65.36 ± 4.12/66.33 ± 5.35 CT and Tai Chi Quan/CT 4 months ①②③⑤
13 Zhang and Chan (24) China AMI 66/66 56.4 ± 4.3/55.7 ± 4.26 CT and Tai Chi Quan/CT 1 year ①⑤⑦
14 Wang et al. (25) China STEMI 30/30 55.25 ± 11.13/54.86 ± 12.05 CT and Tai Chi Quan/CT 6 months ②⑦
15 Liu et al. (26) China AMI 40/40 <60 years old, 60–70 years old, ≥70 years old: 18, 8, 14/16, 9, 15 CT and Tai Chi Quan/CT 12 weeks ①②⑩
16 Lu (27) China AMI 48/48 65.30 ± 2.45/66.07 ± 2.84 CT and Tai Chi Quan + Ba Duan Jin/CT 3 months ①③⑤⑩
17 Yu et al. (28) China AMI 53/53 61.13 ± 11.06/60.4 ± 11.37 CT and Ba Duan Jin/CT 6 months ①③④⑤
18 Li et al. (29) China AMI 29/28 58.52 ± 5.95/57.57 ± 6.69 CT and Tai Chi Quan/CT 6 months ⑤
19 Mao et al. (30) China AMI 56/54 60.43 ± 10.21/61.30 ± 11.12 CT and Ba Duan Jin/CT 12 weeks ①③
20 Chen et al. (31) China AMI 48/48 59.98 ± 10.86/61.49 ± 11.54 CT and Ba Duan Jin/CT 24 weeks ①
21 Rosane et al. (32) Brazil AMI 31/31 56 ± 9/60 ± 9 CT and Tai Chi Quan/CT + spinal stretching exercise 12 weeks ⑥
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AMI, acute myocardial infarction; STEMI, ST-segment elevation myocardial infarction; T, traditional Chinese exercise rehabilitation group; C, control group; CT, conventional treatment; ① LVEF ② NT-proBNP ③ LVDD ④ LVESD ⑤ 6MWT ⑥ VO2 ⑦ SF-36 ⑧ HAMA ⑨ HAMD ⑩ MACEs.

3.2. Quality assessment

The results of the risk of bias evaluation of the included literature are presented in Supplementary Table S1. Two studies (12, 28) employed random samplings, 16 studies utilized random number table grouping and three studies (24–26) did not describe the randomization method. Only Rosane (32) used blinding of outcome assessment.

3.3. Meta analysis

3.3.1. Effects of TCE on Nt-proBNP

Seven articles involving 514 patients reported NT-proBNP levels. The NT-proBNP of patients who engaged in TCE was significantly less compared with the control group based on a random-effects model (MD = −96.34, 95%CI: −140.69–−51.98, P < 0.00001, I2 = 96%) (Figure 2).

Figure 2.

Figure 2

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The forest plot of NT-proBNP.

3.3.2. Effects of TCE on echocardiographic indicators of cardiac function

15 articles involving 1,404 patients reported the LVEF outcome. The LVEF of patients who engaged in TCE was significantly improved compared with the control group based on a random-effects model (MD = 4.58, 95%CI: 3.28–5.88, P < 0.00001, I2 = 79%) (Figure 3A).

Figure 3.

Figure 3

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The forest plots of (A) LVEF, (B) LVDD, (C) LVESD.

Eight studies involving 786 patients reported the LVDD outcome. The LVDD of patients who engaged in TCE was significantly less compared with the control group based on a random-effects model (MD = −3.83, 95%CI: −5.27–−2.38, P < 0.00001, I2 = 94%) (Figure 3B).

Four studies involving 456 patients reported the LVESD outcome. The LVESD of patients who engaged in TCE was significantly less compared with the control group based on a random-effects model (MD = −2.17, 95%CI: −4.10–−0.24, P < 0.00001, I2 = 96%) (Figure 3C).

3.3.3. Effects of TCE on physical function

Ten studies involving 915 patients reported the 6MWT outcome. The 6MWT of patients who engaged in TCE was significantly improved compared with the control group based on a random-effects model (MD = 69.60, 95%CI: 34.59–104.60, P < 0.00001, I2 = 99%) (Figure 4A).

Figure 4.

Figure 4

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The forest plots of (A) 6MWT, (B) VO2.

Five studies involving 448 patients reported the VO2 outcome. The VO2 of patients who engaged in TCE was significantly improved compared with the control group based on a random-effects model (MD = 4.38, 95%CI: 2.25–6.51, P < 0.00001, I2 = 94%) (Figure 4B).

3.3.4. Effects of TCE on quality of life

Four studies involving 372 patients estimated the quality of life with SF-36 outcome. The SF-36 score of patients who engaged in TCE was significantly improved compared with the control group based on a random-effects model (MD = 13.34, 95%CI: 9.25–17.42, P = 0.008, I2 = 75%) (Figure 5).

Figure 5.

Figure 5

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The forest plot of SF-36.

3.3.5. Effects of TCE on emotional distress

Two studies involving 120 patients reported the HAMA outcome. The HAMA of patients who engaged in TCE was significantly less compared with the control group based on a fixed-effects model (MD = −4.34, 95%CI: −5.18–−3.50, P = 1.00, I2 = 0%) (Figure 6A).

Figure 6.

Figure 6

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The forest plots of (A) HAMA, (B) HAMD.

Three studies involving 240 patients reported the HAMD outcome. The HAMD of patients who engaged in TCE was significantly less compared with the control group based on a random-effects model (MD = −3.48, 95%CI: −5.35–−1.61, P = 0.0002, I2 = 88%) (Figure 6B).

3.3.6. Effects of TCE on MCAEs

Five articles involving 526 patients reported the MACEs outcome. The incidence of MACEs of patients who engaged in TCE was significantly less compared with the control group based on a fixed-effects model (RR = 0.31, 95%CI: 0.20–0.47, P = 0.52, I2 = 0%) (Figure 7).

Figure 7.

Figure 7

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The forest plot of MCAEs.

3.4. Sensitivity analysis and subgroup analysis

Sensitivity analyses were performed by excluding each study one by one. The results revealed NT-proBNP, LVEF, LVDD, LVESD, 6MWT, and VO2 outcomes were not significantly altered. The sensitivity of the SF-36 outcome decreased when Zhang's study (24) was removed (I2 changed to 50%), and the sensitivity of the HAMD outcome decreased when Guo's study (20) was excluded (I2 changed to 0%).

Meanwhile, we implemented subgroup analyses of NT-proBNP, LVEF, 6MWT, VO2, and SF-36 outcomes according to the type of TCE in Table 2. There are three subgroups depending on the type of exercise: Tai Chi, Ba Duan Jin, and Tai Chi combined Ba Duan Jin. As shown the heterogeneity of subgroup analyses in NT-proBNP, LVEF and SF-36 outcomes significantly decreased.

Table 2.

Subgroup analyses.

Outcome Subgroup Number of studies Sample size MD (95%CI) Statistical method P value for heterogeneity I 2
NT-proBNP Ba Duan Jin 4 310 −67.85 [−107.84, −27.87] Random-effects <0.00001 89%
Tai Chi 3 204 −147.93 [−344.66, 48.81] Random-effects <0.00001 99%
LVEF Ba Duan Jin 10 972 3.93 [3.25, 4.61] Fixed-effects 0.10 39%
Tai Chi 3 276 6.45 [0.25, 12.65] Random-effects <0.00001 95%
Ba Duan Jin and Tai Chi 2 156 6.23 [4.30, 8.16] Fixed-effects 0.18 44%
6MWT Ba Duan Jin 6 602 54.57 [29.03, 80.11] Random-effects <0.00001 97%
Tai Chi 3 253 73.86 [9.35, 138.36] Random-effects <0.00001 93%
VO2 Ba Duan Jin 2 190 5.07 [1.02, 9.21] Random-effects <0.00001 94%
Tai Chi 2 199 3.49 [0.60,6.38] Random-effects 0.02 81%
SF-36 Ba Duan Jin 2 180 10.18 [8.52, 11.85] Fixed-effects 0.68 0%
Tai Chi 2 192 20.81 [14.93, 26.69] Fixed-effects 1.0 0%
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4. Publication bias

Funnel plots were used to assess the publication bias of the 21 included articles. We drew a funnel plot with the LVEF outcome divided into three subgroups as an example. As seen in Figure 8, all studies were relatively evenly distributed and located on both sides of the axis, and the bias was acceptable.

Figure 8.

Figure 8

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Funnel plot of LVEF.

5. Discussion

MI is a high-incidence disease worldwide, bringing a heavy social burden, especially for low and middle-income countries (33). Numerous studies have indicated that PCI only solves the blockage problem of blood vessels, but long-term rehabilitation exercises are still needed to restore myocardial function (34, 35). The common belief among patients is that after a MI, exercise should be avoided. However, patients who have undergone PCI or CABG should participate in a clinically supervised exercise program. According to Fernandez's study (36), patients who engage in CR have a 26% reduction in mortality and an 18% reduction in hospital readmission rates compared to patients who do not participate in CR. Exercises for post-MI rehabilitation are a crucial part of enhancing patients' quality of well-being and long-term prognosis following drug and surgical treatment. Additionally, it plays a key role in cardiac remodeling and cardiovascular regulation (37). Although CR is strongly recommended as a post-MI treatment, the current underuse is concerning (38, 39). Thus, our meta-analysis focused on MI patients. In recent years, TCEs such as Tai Chi, Qi Gong, and Ba Duan Jin have become increasingly popular around the world because of their gentle movements, low-risk, easy training, ancd long-term adherence. TCE is not only effective in regulating the physical condition and mental health of patients with Parkinson's disease, type 2 diabetes, chronic obstructive pulmonary disease, chronic pain disorders, and cancer but also beneficial in improving the cardiopulmonary function and quality of life (7).

A total of 21 RCTs comprising 1,890 patients were included for the first time to perform the meta-analysis. Unfortunately, Tai Chi and Ba Duan Jin were the only TCEs included. In comparison to the control group, patients in the TCE group demonstrated better results in NT-proBNP, LVEF, LVDD, LVESD, 6MWT, VO2, SF-36 scores, HAMA, and HAMD scale outcomes, and showed a decrease in the MACEs outcome. In addition, Ba Duan Jin and Tai Chi were likewise discovered to be safe, with no instances of TCE-related adverse events. This is consistent with Ting Liu's meta-analysis, Tai Chi increases social well-being and physical endurance in CHD patients (40). A randomized controlled trial reported that adapted personalized motor activity could improve health in individuals with mental disorders and physical comorbidities (41). Notably, our study further demonstrated that TCE improved the emotions of patients with MI as well. About 50% of patients experience anxiety after MI (42). Due to diminished cardiopulmonary function, which affects their capacity for employment and social contact as well as their long-term drug dependence, frequent hospitalizations, and significant financial stress, they are more prone to anxiety, depression, and other negative emotions. Therefore, TCE is very suitable and effective for MI patients to improve their mental and physical function. Apart from that, some researchers believed that TCE might influence cholesterol (18) and myocardial fibrosis levels (23) throughout the screening. However, the number of studies was not enough to perform a meta-analysis.

Furthermore, we conducted sensitivity analysis and subgroup analysis to investigate the source of heterogeneity. Except for HAMA and MACEs outcomes, some heterogeneity in the results of other outcomes may be due to certain clinical and methodological variations in different trials. Subgroup analysis revealed differences in TCE types as a potential source of heterogeneity and suggested that Tai Chi might be more efficient than Ba Duan Jin.

TCE involves the purposeful regulation of breath and thought, in harmony with the control of the body. Combining self-awareness with physical posture, the flow of breath, and stillness of thought is considered an exercise that activates the natural self-regulatory capacity to stimulate a balanced release of endogenous neurohormones (43). Overall, our meta-analysis provided reliable results in terms of TCE improving CR in patients with MI.

5.1. Limitations

This study has several limitations. Firstly, there is a lack of gray literature. If the findings from unpublished studies differ from the published data, the meta-analysis may become biased. Secondly, most of the included literature did not explicitly mention allocation concealment and only one study was blinded, so selection bias may be present. Finally, only Ba Duan Jin and Tai Chi were discussed in this essay. The majority of the included RCTs were Chinese, so language restrictions might lead to publication bias.

6. Conclusion

In conclusion, the use of TCE in MI patients showed significant improvements in cardiac function, physical function, quality of life, and mental health, also reduced the incidence of MACEs, which has good clinical application value and is recommended as a complementary therapy for CR in MI patients. It was found that Tai Chi might be more efficient than Ba Duan Jin. However, the above findings still need to be verified by more high-quality RCTs. The specific frequency and duration of different exercises should be analyzed to prescribe the most appropriate exercise prescription in the future.

Funding Statement

This study was funded by the 2023 Science and Technology Innovation Special Project of Dongzhimen Hospital of Beijing University of Chinese Medicine, Grant/Award Number: DZMKJCX-2023-030.

Data availability statement

Publicly available datasets were analyzed in this study. The data analyzed in this article can be found here: PubMed (https://pubmed.ncbi.nlm.nih.gov/). Web Of Science (https://clarivate.com/products/web-of-science/). Cochrane library (https://www.cochranelibrary.com/). Embase (https://www.embase.com/). CNKI (https://www.cnki.net/). VIP (http://Lib.cqvip.com/). Wan Fang Databases (https://www.wanfangdata.com.cn/index.html). SinoMed (http://www.sinomed.ac.cn/index.jsp).

Author contributions

JZ: Study design, data analysis, and writing the original draft. JW and MY: Paper screening and data extraction. XCS and YW: Quality assessment. XXS: Writing-review and editing. All authors contributed to the article and approved the submitted version.

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher's note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Supplementary material

The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fcvm.2023.1223677/full#supplementary-material

Table1.docx (673.3KB, docx)

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

Table1.docx (673.3KB, docx)

Data Availability Statement

Publicly available datasets were analyzed in this study. The data analyzed in this article can be found here: PubMed (https://pubmed.ncbi.nlm.nih.gov/). Web Of Science (https://clarivate.com/products/web-of-science/). Cochrane library (https://www.cochranelibrary.com/). Embase (https://www.embase.com/). CNKI (https://www.cnki.net/). VIP (http://Lib.cqvip.com/). Wan Fang Databases (https://www.wanfangdata.com.cn/index.html). SinoMed (http://www.sinomed.ac.cn/index.jsp).

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