Characteristics Tang et al.*(42) (N=100) Trinh et al.**(44) (N=288) Quang et al.*(36) (N=140) Do et al.***(43) (N=615)  
Sample year 2006-2008 2009 2008-2009 2010  
Location Ha Noi HCMC HCMC Five rural and urban clinics  
Poor-adherence of antiretroviral drugs, n/N (%) 6 month: 21/81(26) 12 month: 24/75 (32) (Self reported with VAS) 59/228 (25) (Self-reported)      
Viral suppression, n/N (%) 6 month: 60/76 (74) 12 month: 51/75 (68) (< 1,000 copies/ml)   175/228 (77) (< 1,000 copies/ml) 6 month: NR (76.6) 12 month: NR (83.1) (< 250 copies/ml) NR NR 153/615 (25) (ACASI with VAS)
N, number of participants; n, frequency; HCMC, Ho Chi Minh City; ART, antiretroviral therapy; NR, not reported; VAS, a 30-day visual analogue scale for evaluating the usage of a prescribed regimen in the preceding month; ACSI, audio computer assisted self-interview. * Longitudinal study. ** Cross-sectional study among people on ART over 1 year. *** Cross-sectional study among people on ART.
Table 4: Summary of antiretroviral-adherent level and viral suppression among people on first-line ART in Vietnam, 2000 -2009.
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