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reprovision programmes in Britain, provided that these are well planned and well resourced. ConclusionOur findings dispel some of the common concerns and myths associated with "care in the community" patients and provide robust evidence that community care has worked well for the former patients of psychiatric hospitals, most of whom are currently living in the community and posing minimal risk to themselves and the public. In light of this, a change towards institutional care is not a rational policy.We thank the research workers who have contributed to the collection of the data, the patients, and the hospital and community staff. This paper is designated the TAPS project 45.Contributors: NT participated in data collection, analysis, interpretation, and drafting the paper. JL conceived and designed the Team for the Assessment of Psychiatric Services (TAPS) project and has been the director of the research team for the past 13 years. He helped to draft and edit this paper. GG participated in the analysis and interpretation of the mortality data. He also computerised the assessment tools used by TAPS. NT and JL will act as guarantors for the paper.Funding: The Team for the Assessment of Psychiatric Services (TAPS) is funded by the Department of Health, North Thames Regional Health Authority, and the Gatsby Foundation. It is administered through the Department of Psychiatry and Behavioural Sciences, Royal Free and University College Medical School, London.Competing interests: The TAPS project was largely funded by the Department of Health. This, and previous TAPS papers, were sent for comments to the Department of Health before submission. However, all papers, including this one, were drafted without administrative intervention or scrutiny of any kind. The opinions expressed do not necessarily reflect the policy of the Department of Health. AbstractObjective To receive and collate reports of death or major complications of transfusion of blood or components.

Several new tests have been recently introduced by the United Kingdom Blood Services to improve safety. The frequency (or risk) of hepatitis B virus (HBV), hepatitis C virus (HCV) and HIV infectious donations entering the UK blood supply during 1996-2003 has been estimated. These years span the introduction of nucleic acid testing (NAT) for HCV, HIV combination antigen and antibody test and NAT for HIV. The frequency of an infectious donation entering the blood supply due to i) the window period, ii) assay failures and iii) human and technical errors in testing and processing, was estimated. The window period risk was estimated using the incidence of infection in donors and the length of the window period for tests in use, with an adjustment for atypical inter-donation intervals in seroconverting donors. The estimated frequency of infectious donations entering the blood supply during 1996-2003 was 1.66, 0.80 and 0.14 per million for HBV, HCV and HIV respectively. HCV NAT resulted in an over 95% fall in the risk of HCV. Current usage of HIV combined antibody-antigen tests and of HIV NAT reduced the estimated risk of HIV by 10%. Since 1996, the risk of transfusion-transmitted HBV, HCV and HIV infection in the UK has been lowered by several improvements to donation testing, although the absolute reduction in risk has been small. Vigilance for errors and the affects of donor selection may be as or more important than further reductions to window periods of tests for improving blood safety with respect to HBV, HCV and HIV.

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The aim of this paper is to describe the development of a national hepatitis C register and the completeness of the data it contains. This is a descriptive report of the structure and function of the register, including case definitions, registration and follow-up procedures, and methods used to maximize data quality and to obtain comparative data sources. The register contains data on HCV-infected individuals who acquired their infections on a known date and by a known route; to date all are transfusion recipients identified during the UK lookback exercise, who tested positive or indeterminate for anti-HCV after receiving 'infected' blood issued before the introduction of routine testing of the blood supply for anti-HCV. By 31 December 1999, 871 (87%) of 996 eligible transfusion recipients had been registered, and 984 (99%) flagged in the NHS Central Registers. Registered patients had been infected for an average of 11.1 years (SEM 0.1); around half were being cared for by clinicians with a specialist interest in liver disease. Except for the information on tobacco use, current alcohol use, and hepatitis B status, data were more than 80% complete, and for most variables, more than 90% complete. The consistency of data abstraction was found to be 98% (SEM 0.5). In conclusion, the Register contains high quality anonymised data on one of the largest cohorts of individuals with HCV infections acquired on a known date and by a known route. It could serve as a model for other chronic disease registers; developers may find the structure, design, and methodological issues addressed useful.