Objective To be aware of the treatment status and economic burden of people with hemophilia (PWH) in mainland China, so as to seek the optimal therapy for them. Methods The relevant Chinese and English databases such as CBM, CNKI, VIP, WanFang Database, PubMed, EMbase and The Cochrane Library (Issue 6 of 12, June 2011) were searched in June, 2011. The economic analyses and studies on PWH treatment and economic burden published from 1980 to 2011 were collected. Results The diagnosis and treatment of PWH in mainland China lagged behind. More than 30% of PWH did not receive or occasionally received treatment, and less than 10% received prophylactic therapy. Lots of PWHs still used FFP or cryoglobulin which were easily to cause blood-borne viral diseases. More than half of PWH families could afford a little or completely could not afford the therapy. Low dose prophylactic therapy was cost-efficient than on-demand therapy. Based on the therapy status, it was estimated that approximately RMB 53 844 yuan per year per patient should be put into practice in order to have PWH received low-dose prophylactic therapy, and to prevent 80% of bleeding. Conclusion PWH in mainland China is poor in treatment status and heavy in economic burden, so it is an optimal way to adopt comprehensive care model and low-dose prophylactic therapy in mainland China.
ObjectiveTo systematically review the risk factors leading to postoperative persistence of children diagnosed with obstructive sleep apnea (OSA) after adenoidectomy and tonsillectomy. MethodsPubMed, EMbase, The Cochrane Library, ClinicalTrials.gov, CNKI, VIP, WanFang Data and SinoMed databases were electronically searched to collect case-control studies and cohort studies related to risk factors for postoperative persistence of OSA in children from inception to July 2019. Two reviewers independently screened literature, extracted data, and evaluated the risk of bias of the included studies. Meta-analysis was then performed using RevMan 5.3 software. ResultsA total of 12 cohort studies involving 1 659 OSA patients were included. Meta-analysis results showed that the risk of postoperative persistence of OSA in children with preoperative obesity was 3.47 times higher than that in non-obese children (RR=3.47, 95%CI 2.04 to 5.92, P<0.000 01). Compared with normal-weight children, obese children had 4.11 times higher risk of postoperative residual OSA (RR=4.11, 95%CI 1.68 to 10.07, P<0.000 01).ConclusionsPreoperative obesity is a risk factor for postoperative persistence of OSA in children. Due to the limited quantity and quality of included studies, more high-quality studies are needed to verity the above conclusions.
Observational studies based on real-world data are providing increasing amount of evidence for evaluating therapeutic outcomes, which is important for timely decision-making. Although time and costs for data collection could be saved using real-world data, it is significantly more complex to design real world researches with lower risk of bias. In order to enhance the validity of causal inference and to reduce potential risk of bias in real world studies, the Working Group of China Real world data and studies Alliance (China REAL) has formulated recommendations for designing observational studies to evaluate therapeutic outcomes based on real-world data. This guidance introduces design types commonly used in real world research; recommends key elements to consider in observational studies, including sample selection, specifying and allocating exposures, defining study entry and endpoints, and pre-designing statistical analysis protocols; and summarizes potential biases and corresponding control measures in real-world studies. These recommendations introduces key elements in designing observational studies using real-world data, for the purpose of improving the validity of causal inference. However, the application scope of these recommendations may be limited and warrant constant improvement.