• Xuanlin Li, Wenrui Liu, Wenqing He, Yang Xie, and Jiansheng Li.
• Co-construction Collaborative Innovation Center for Chinese Medicine and Respiratory Diseases by Henan and Education Ministry of P.R. China/Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou 450046, Henan, China.
• Zhonghua Wei Zhong Bing Ji Jiu Yi Xue. 2020 Jun 1; 32 (6): 664-670.

ObjectiveTo systematically evaluate the incidence of coronavirus disease 2019 (COVID-19) syndrome in traditional Chinese medicine (TCM), and to provide a basis for the standard of COVID-19 syndrome differentiation.MethodsCNKI, China Medical Journal Network, PubMed and Embase databases were searched by computer, and TCM syndrome data of COVID-19 cross-sectional surveys and case series were collected from the establishment of the database to March 31st in 2020. Two researchers independently screened the literature, extracted relevant data such as TCM syndromes, and evaluated the quality of the literature according to the quality assessment tool recommended by the JBI Evidence-Based Health Care Center. Stata 14.0 software was used to perform a single-group Meta-analysis of TCM syndromes.ResultsThirteen cross-sectional studies and 5 case series studies were included, with a total of 2 139 patients. The analysis of the cross-sectional studies showed that the risk bias was higher in the identification, control and accuracy of the confounding factors, and the description of the reliability and validity of the outcome indicators was unclear. The analysis of the case series studies showed that the overall risk bias was small, but there was a lack of a comprehensive description of the assessment when selecting patients. A total of 33 TCM syndromes of COVID-19 were sorted out by combining the TCM syndromes with the same disease position and pathogenic syndrome in the included 18 literatures, and there were 10 types of TCM syndromes of which the number of occurrences was ≥ 50, the incidence rate was ≥ 10%, and had statistical significance [indicated that 95% confidence interval (95%CI) didn't cross the meaningless line 0], including cold dampness syndrome (469 cases, incidence rate was 28.2%, 95%CI was 5.9%-50.6%), damp heat syndrome (247 cases, incidence rate was 32.1%, 95%CI was 10.7%-53.6%), epidemic closed lung syndrome (228 cases, incidence rate was 28.9%, 95%CI was 12.5%-45.2%), pulmonary and spleen Qi deficiency syndrome (202 cases, incidence rate was 22.1%, 95%CI was 9.5%-34.7%), dampness stagnation lung syndrome (180 cases, incidence rate was 41.2%, 95%CI was 18.4%-64.1%), dampness obstructing lung and spleen syndrome (81 cases, incidence rate was 56.3%, 95%CI was 48.1%-64.4%), evil heat syndrome lung syndrome (76 cases, incidence rate was 31.1%, 95%CI was 25.3%-36.9%), dampness-blocking lung and stomach syndrome (70 cases, incidence rate was 13.4%, 95%CI was 10.4%-16.3%), heat poisoning lung closure syndrome (55 cases, incidence rate was 16.9%, 95%CI was 8.3%-25.5%), and Qi-Yin deficiency syndrome (53 cases, incidence rate was 13.7%, 95%CI was 2.7%-24.8%). Subgroup analysis showed that there were 6 types of TCM syndromes that met the above conditions in cross-sectional studies, namely cold and damp lung syndrome (200 cases, incidence rate was 20.9%, 95%CI was 12.6%-29.2%), damp heat syndrome (221 cases, incidence rate was 41.8%, 95%CI was 9.4%-74.2%), dampness-disease lung syndrome (120 cases, incidence rate was 41.4%, 95%CI was 8.6%-74.3%), lung and spleen Qi deficiency syndrome (115 cases, incidence rate was 19.2%, 95%CI was 6.8%-31.7%), heat-fever lung syndrome (76 cases, incidence rate was 31.1%, 95%CI was 25.3%-36.9%) and Qi-Yin deficiency syndrome (53 cases, incidence rate was 13.7%, 95%CI was 2.7%-24.8%). There were 3 kinds of TCM syndromes in case series studies, which were virus closed lung syndrome (133 cases, incidence rate was 44.0%, 95%CI was 24.5%-63.4%), lung and spleen Qi deficiency syndrome (87 cases, incidence rate was 38.7%, 95%CI was 32.3%-45.0%), and dampness and depression lung syndrome (60 cases, incidence rate was 40.6%, 95%CI was 29.3%-52.0%).ConclusionsThe TCM syndromes of COVID-19 syndrome were widely distributed and complex. The main TCM syndromes were cold dampness syndrome, damp heat syndrome, epidemic closed lung syndrome, pulmonary and spleen Qi deficiency syndrome, dampness stagnation lung syndrome, dampness obstructing lung and spleen syndrome, evil heat syndrome lung syndrome, dampness-blocking lung and stomach syndrome, heat poisoning lung closure syndrome, Qi-Yin deficiency syndrome, which can provide reference for the standard of TCM syndrome differentiation of COVID-19.

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