Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : Monitoring trends in HIV prevalence among young people, aged 15 to 24 years, in Manicaland, Zimbabwe | Marsh et al. Journal of the International AIDS Society 2011 14 27 http content 14 1 27 JOURNALOF THE INTERNATIONAL AIDS SOCIETY RESEARCH Open Access Monitoring trends in HIV prevalence among young people aged 15 to 24 years in Manicaland Zimbabwe IZi m Her Ix A l l X rc h 1 n ctx A 11 Xì KX XX2 r hricfl A - lx 1 3 ŨC IC l l XX11 XILX4 Phillic I ich ri2 Kimberly A Ivldisil Constance A INyamukapa ClUistl A Donnelly Jesus M Garcia Cdlleja Phillis IViusildti Geoffrey P Garnett1 3 Edlth Mpandaguta2 Nicholas C Grassly1 3 and Slmon Gregson1 2 Abstract Background In June 2001 the United Nations General Assembly Special Session UNGASS set d target of reducing HIV prevalence among young women and men aged 15 to 24 years by 25 In the worst-affected countries by 2005 and by 25 globally by 2010. We assessed progress toward this target In Manicaland Zimbabwe using repeated household-based population serosurvey data. We also validated the representativeness of surveillance data from young pregnant women aged 15 to 24 years attending antenatal care ANC clinics which UNAIDS recommends for monitoring population HIV prevalence trends In this age group. Changes In sociodemographic characteristics and reported sexual behaviour are Investigated. Methods Progress towards the UNGASS target was measured by calculating the proportional change In HIV prevalence among youth and young ANC attendees over three survey periods round 1 1998-2000 round 2 20012003 and round 3 2003-2005 . The Z-score test was used to compare differences In trends between the two data sources. Characteristics of participants and trends In sexual risk behaviour were analyzed using Student s and twotailed Z-score tests. Results HIV prevalence among youth In the general population declined by from to from round 1 to 3. Intermediary trends showed a large decline from round 1 to 2 of from to offset by an increase from round 2 to 3 of from to . Among young
