Percentage of people who had an HIV diagnosis within 12 months before AIDS diagnosis, among people diagnosed with AIDS in 2010, by country of residence–Italy, Spain, and United States.

aNational AIDS Register include the whole country. Data collected at 12/31/2011.bSpanish AIDS Register which covers the whole country. Information on date of of HIV dianosis is available in 900 (96.8%) of AIDS cases notified to the Register.cNew diagnoses of AIDS, reported by 31 December 2011.Estimated numbers resulted from statistical adjustment that accounted for missing risk-factor information, but not for reporting delays and incomplete reporting.dMSM, men who have sex with men; IDU, injection drug use.a. 国家艾滋病登记系统（National AIDS Register）覆盖全国范围，数据采集截止至2011年12月31日。 b. 西班牙艾滋病登记系统（Spanish AIDS Register）覆盖全国范围，向该登记系统上报的艾滋病病例中，有900例（占比96.8%）可获取HIV诊断日期信息。 c. 截至2011年12月31日上报的新增艾滋病确诊病例，其统计估算值通过统计学调整得出：该调整已考虑缺失的风险因素信息，但未纳入报告延迟及报告不完整的影响。 d. MSM（men who have sex with men，男男性行为者）；IDU（injection drug use，注射吸毒者）。