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National Healthcare Quality Report - part 3

Cách tiếp cận này khác nhau từ các báo cáo trong quá khứ, trong đó các phân tích này cung cấp một tỷ lệ hàng năm thay đổi trong chất lượng trên tất cả các báo cáo các biện pháp cốt lõi. (Tỷ lệ đó là không liên quan đến một giai đoạn cụ thể, nhưng là một tổng quát "tỷ lệ cải thiện.") | United States a formula that produces the geometric rate of change is used for this calculation.vi In addition AHRQ has analyzed the set of core measures for the report and attempted to obtain a common baseline data year and common comparison year to fix the trends analysis to a particular period of time. This approach differs from past reports in which these analyses provided an annualized rate of change in quality across all the core report measures. That rate was not linked to a particular period but was a generalized rate of improvement. The primary reason for this addition is that the data sources for the NHQR are diverse and each has particular years of data available. AHRQ has received feedback that its past trend analysis although useful is difficult to operationalize because the improvement rates are not fixed to particular points in time to permit analysis of particular policy initiatives. In addition to providing the general rate of change for measures that span the years 1994 for a few measures to 2005 this year s report therefore fixes the baseline analysis year as 20002001 and the comparison year as 2004-2005. In particular an effort has been made to ensure that wherever trend data are available a discussion is presented of whether performance has improved. Paired data years were used to allow the trend analysis to include the maximum number of core measures. The geometric rate of change which assumes the same rate of change each year between the two time periods has been calculated. In addition to the above changes made to improve the presentation of trends two criteria are applied to determine whether a significant trend exists First the difference between the earliest and most recent estimates shown must be statistically significant with p 0.05. Second the magnitude of average annual rate of change must be at least 1 per year. Only changes over time that meet these two criteria are discussed in the 2007 reports unless otherwise noted. Introduction