ObjectiveTo systematically review the diagnostic accuracy of MRI in preschool children with autism spectrum disorder. MethodsDatabases including Web of Science, PubMed, The Cochrane Library, EMbase, CBM, CNKI, WanFang Data, and VIP were electronically searched for studies on MRI in diagnosis of preschool children with autism spectrum disorder from inception to January 2022. Two reviewers independently screened the literature, extracted data, and assessed the risk of bias the included studies. Then, meta-analysis was performed using Meta-Disc, RevMan 5.4 and Stata 16.0 software. ResultsA total of 17 studies were finally included. The pooled sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, diagnosis odds ratio and area under the curve of SROC were 0.78 (95%CI 0.76 to 0.81), 0.77 (95%CI 0.75 to 0.79), 3.92 (95%CI 2.83 to 5.41), 0.28 (95%CI 0.23 to 0.35), 14.8 (95%CI 9.31 to 23.52) and 0.86, respectively. Subgroup analysis revealed that the source of patients, age, prediction methods and analysis features were potential sources of heterogeneity. Heterogeneity in the subgroup of 1-3 years old was small, and the pooled sensitivity, specificity and area under the curve of SROC were 0.81 (95%CI 0.76 to 0.85), 0.82 (95%CI 0.78 to 0.86) and 0.87, respectively. The pooled sensitivity, specificity and area under the curve of SROC for non-site studies were 0.80 (95%CI 0.75 to 0.84), 0.80 (95%CI 0.76 to 0.85) and 0.86, respectively. ConclusionMRI has a high accuracy in the diagnosis of preschool children with autism spectrum disorder; however, the possibility of misdiagnosis and missed diagnosis should be considered. Due to the limited quantity and quality of the included studies, more high-quality studies are needed to verify the above conclusion.
ObjectiveTo analyze the quality of the randomized controlled trials (RCTs) included in the systematic review in the anti-infection field in the elderly.MethodsA comprehensive and systematic literature search in PubMed, EMbase, CNKI, The Cochrane Library, WanFang Data, VIP and CBM was conducted to collect systematic review or meta-analysis which involoved anti-infection RCTs in the elderly from inception to February 17th, 2020. The results of Cochrane risk of bias assessment of the included RCTs were analyzed.ResultsA total of 8 systematic reviews were included, involving 19 RCTs and 6 735 participants. The sample size of the RCTs ranged from 23 to 2538, and the published date were from 1980 to 2020. The included RCTs focused on postoperative infection, urinary tract infection, Clostridium Difficile infection and so on. The included RCTs had methodological quality issues. Among the assessment results of low risk of bias, the domains of selection bias (random sequence generation) and selection bias (allocation hiding) had the lowest proportion (47.3%, 36.8%). Among the assessment results of unclear risk of bias, the domains of selection bias (random sequence generation) and selection bias (allocation hiding) had the highest proportion (42.1%, 52.6%). Among the assessment results of high risk of bias, the domains of measurement bias and performance bias had the highest proportion (21.1%, 21.1%).ConclusionsThe quality of RCTs in the field of anti-infection in the elderly requires further improvement. High-quality anti-infection RCTs for the elderly should be developed in future to better guide clinical practice.