The data collection

The data collection buy AZD6244 process adheres to the legal

requirements implemented by the national Protection against Infection Act (IfSG) from 2001. Thus, no written informed consent is required from the patients whose data are collected. The ClinSurv HIV project protocol was approved by the German Federal Commissioner for Data Protection and the Data Protection Officers of the Federal Länder, where collaborating treatment centres exist. At the RKI, incoming data are integrated in the central ClinSurv HIV database. Incoming data are automatically protected against loss and damage, as data on the server are backed up daily, weekly, monthly and yearly. Scientists at the RKI do not have access to data containing information that allows individuals to be identified. Control procedures regarding access, data

medium, data storage and operational structures comply with the Federal Data Protection Law [Bundesdatenschutzgesetz (BDGS)]. All compiled data are systematically and regularly examined for plausibility and completeness by means of computerized algorithms using 85 data checks. All ART documentations are assessed manually. After application of the quality control algorithms the centres are requested to amend data inconsistencies within a certain time frame. Declined data must be revised according to standard operation procedures (SOPs) and re-delivered

to the RKI. Patient data not fulfilling the Venetoclax concentration defined patient inclusion and quality control criteria are excluded. Thiamine-diphosphate kinase Monitoring visits at the participating centres are conducted annually. Proposals for projects aiming to utilize the ClinSurv HIV data can be submitted to the RKI. The Scientific Board of the ClinSurv HIV Study Group discusses the analysis plan, makes a decision on the project and gives further advice, if indicated. Scientists wishing to utilize data can access the data after a written study protocol has been accepted. It is recommended that analyses are conducted in co-operation with the study treatment centres and the RKI. By 30 June 2009, the database included information on a total of 14 874 patients consistent with the defined eligibility and quality control criteria. One-third of the patients (n=4653) had their first contact before the start date of 1 January 1999, and 10 221 patients (68.7%) were enrolled thereafter. A mean number of 6239 patients were observed per half-year observation period (range 4023–7936). During the most recent half-year periods (the second half of 2008 and the first half of 2009) 7936 and 7805 patients, respectively, had valid observations according to the eligibility criteria. The composition of the study population over time is shown in Figure 2. Of all the sampled patients, 1215 are known to have died (8.2%).

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