• Lin Gao, Yinqi Shuai, Lihong Wen, Hong Zhang, Yi Zhang, and Xiaoyun Zhang.
• Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan Province, China.
• Medicine (Baltimore). 2022 Nov 25; 101 (47): e31637e31637.

BackgroundAlzheimer's disease (AD) is an age-related degenerative change of the central nervous system, the cause of which remains unclear. Recent studies have found that brain inflammation caused by microbial infections may be one of the etiologies of AD, and antibiotics as novel treatments may be beneficial for delaying the development of AD. Several prospective studies have investigated the effects of different antibiotics on Alzheimer's disease. However, no systematic review or meta-analysis has evaluated the benefits and safety of antibiotics in AD patients.MethodsThis study will analyze randomized controlled trials and observational studies published from database inception to December 31, 2022, and included direct or indirect evidence. Studies will be retrieved by searching PubMed, Scopus, Web of Science, Cochrane Central Register of Controlled Clinical Trials, CNKI, and Wan Fang databases. The outcomes of this study included the Alzheimer's Disease Assessment Scale cognitive subscale (ADAS-cog), Montreal Cognitive Assessment (MoCA), Standardized Mini-Mental State Examination (SMMSE), Clinical Dementia Rating (CDR), Frontal Functioning Scale (FAB), Dysfunctional Behavior Rating Instrument (DBRI), Activities of Daily Living (ADLs) Index, and Geriatric Depression Scale (GDS). The risk of bias will be assessed using the Cochrane risk-of-bias assessment instrument for randomized controlled trials. A random-effect/fixed-effects model will be used to summarize the estimates of the mean difference/risk ratio using a 95% confidence interval.ResultsThis study will analyze the benefits and safety of antibiotics in patients with AD.ConclusionThe results of this analysis will provide evidence to evaluate the benefits and safety of antibiotics in the treatment of AD.Copyright © 2022 the Author(s). Published by Wolters Kluwer Health, Inc.

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