BACKGROUND: Loss to follow-up (LTFU) is viewed as a major challenge in improving retention in @entity645 treatment. In Vietnam, the reasons for disengagement from clinics and the effect of injection drug use (IDU) on LTFU with unknown outcome (true LTFU) are not well known. METHODS: Patients receiving antiretroviral therapy (ART) from two @entity645 clinics in Hanoi were included in this observational study between 2007 and 2012, and followed up every 6 months until the end of 2013. The reasons for disengagement from the clinic, and ART status during imprisonment were investigated in @entity1 with a history of IDU to identify true LTFU. The retention rate at 6-54 months and true LTFU rate were calculated. Cox proportional hazards regression models were performed to identify factors associated with true LTFU. RESULTS: There were 1,431 @entity1 , with a follow-up time of 4,371 @entity1 -years (median 2.49 years). At the end of the follow-up period, 71 (5.0%) @entity1 died, 79 (5.5%) transferred to other clinics, 16 (1.1%) disengaged from the clinics, and the calculated true LTFU was 45 (3.1%), with 12-month ART retention rate of 95.3% for the entire study population. Imprisonment was the most frequent reason for disengagement from the clinics. True LTFU correlated significantly with low @entity404 count and high plasma viral load, but not history of IDU. CONCLUSION: Imprisonment is a major cause of disengagement from @entity645 care among @entity1 with a history of IDU.

High Treatment Retention Rate in @entity645 -Infected Patients Receiving Antiretroviral Therapy at Two Large XXXX Clinics in Hanoi, Vietnam.

@entity1 :: ('9606', 'Species') :: ['patients', 'person'] @entity404 :: ('920', 'Gene') :: ['CD4'] @entity645 :: ('57667', 'Species') :: ['HIV']
@entity645 :: (57667,Species) :: ['HIV']
