Trends and risk factors for HIV, HCV and syphilis seroconversion among drug users in a methadone maintenance treatment programme in China: a 7-year retrospective cohort study

Xia Zou; Li Ling; Lei Zhang

doi:10.1136/bmjopen-2015-008162

Trends and risk factors for HIV, HCV and syphilis seroconversion among drug users in a methadone maintenance treatment programme in China: a 7-year retrospective cohort study

Xia Zou, Li Ling, Lei Zhang

Research output: Contribution to journal › Article › Research › peer-review

31 Citations (Scopus)

Abstract

Objective: This study explores the trends and associated factors of HIV, hepatitis C virus (HCV) and syphilis seroconversion among Chinese methadone maintenance treatment (MMT) clients over a follow-up period of up to 7 years.

Design: Drug users from 14 MMT clinics in Guangdong Province were recruited during 2006-2014. Participants were seronegative with at least one HIV, HCV or syphilis infection at baseline and had completed at least one follow-up test during the study period. We estimated HIV, HCV and syphilis seroconversion rates in follow-up years and identified the underlying predictors using a multivariate Cox regression model.

Results: Among 9240 participants, the overall HIV seroconversion rate was 0.20 (0.13 to 0.28)/100 person-years (pys), 20.54 (18.62 to 22.46)/100 pys for HCV and 0.77 (0.62 to 0.93)/100 pys for syphilis, over the study period. HIV seroconversion rate showed a moderate but non-significant annual decline of 13.34% (.42.48% to 30.56%) (χ² trend test; p=0.369), whereas the decline of HCV seroconversion was 16.12% (5.53% to 25.52%) per annum (p

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title = "Trends and risk factors for HIV, HCV and syphilis seroconversion among drug users in a methadone maintenance treatment programme in China: a 7-year retrospective cohort study",

abstract = "Objective: This study explores the trends and associated factors of HIV, hepatitis C virus (HCV) and syphilis seroconversion among Chinese methadone maintenance treatment (MMT) clients over a follow-up period of up to 7 years. Design: Drug users from 14 MMT clinics in Guangdong Province were recruited during 2006-2014. Participants were seronegative with at least one HIV, HCV or syphilis infection at baseline and had completed at least one follow-up test during the study period. We estimated HIV, HCV and syphilis seroconversion rates in follow-up years and identified the underlying predictors using a multivariate Cox regression model. Results: Among 9240 participants, the overall HIV seroconversion rate was 0.20 (0.13 to 0.28)/100 person-years (pys), 20.54 (18.62 to 22.46)/100 pys for HCV and 0.77 (0.62 to 0.93)/100 pys for syphilis, over the study period. HIV seroconversion rate showed a moderate but non-significant annual decline of 13.34% (.42.48% to 30.56%) (χ2 trend test; p=0.369), whereas the decline of HCV seroconversion was 16.12% (5.53% to 25.52%) per annum (p",

author = "Xia Zou and Li Ling and Lei Zhang",

year = "2015",

month = jul,

doi = "10.1136/bmjopen-2015-008162",

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T1 - Trends and risk factors for HIV, HCV and syphilis seroconversion among drug users in a methadone maintenance treatment programme in China

T2 - a 7-year retrospective cohort study

AU - Zou, Xia

AU - Ling, Li

AU - Zhang, Lei

PY - 2015/7

Y1 - 2015/7

N2 - Objective: This study explores the trends and associated factors of HIV, hepatitis C virus (HCV) and syphilis seroconversion among Chinese methadone maintenance treatment (MMT) clients over a follow-up period of up to 7 years. Design: Drug users from 14 MMT clinics in Guangdong Province were recruited during 2006-2014. Participants were seronegative with at least one HIV, HCV or syphilis infection at baseline and had completed at least one follow-up test during the study period. We estimated HIV, HCV and syphilis seroconversion rates in follow-up years and identified the underlying predictors using a multivariate Cox regression model. Results: Among 9240 participants, the overall HIV seroconversion rate was 0.20 (0.13 to 0.28)/100 person-years (pys), 20.54 (18.62 to 22.46)/100 pys for HCV and 0.77 (0.62 to 0.93)/100 pys for syphilis, over the study period. HIV seroconversion rate showed a moderate but non-significant annual decline of 13.34% (.42.48% to 30.56%) (χ2 trend test; p=0.369), whereas the decline of HCV seroconversion was 16.12% (5.53% to 25.52%) per annum (p

AB - Objective: This study explores the trends and associated factors of HIV, hepatitis C virus (HCV) and syphilis seroconversion among Chinese methadone maintenance treatment (MMT) clients over a follow-up period of up to 7 years. Design: Drug users from 14 MMT clinics in Guangdong Province were recruited during 2006-2014. Participants were seronegative with at least one HIV, HCV or syphilis infection at baseline and had completed at least one follow-up test during the study period. We estimated HIV, HCV and syphilis seroconversion rates in follow-up years and identified the underlying predictors using a multivariate Cox regression model. Results: Among 9240 participants, the overall HIV seroconversion rate was 0.20 (0.13 to 0.28)/100 person-years (pys), 20.54 (18.62 to 22.46)/100 pys for HCV and 0.77 (0.62 to 0.93)/100 pys for syphilis, over the study period. HIV seroconversion rate showed a moderate but non-significant annual decline of 13.34% (.42.48% to 30.56%) (χ2 trend test; p=0.369), whereas the decline of HCV seroconversion was 16.12% (5.53% to 25.52%) per annum (p

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DO - 10.1136/bmjopen-2015-008162

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Trends and risk factors for HIV, HCV and syphilis seroconversion among drug users in a methadone maintenance treatment programme in China: a 7-year retrospective cohort study

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