Mortality among methadone maintenance clients in China: a six-year cohort study

To assess the overall mortality of methadone maintenance treatment (MMT) clients in China and its associated factors. A total of 1,511 MMT clients, all of whom enrolled in China's first eight MMT clinics between March and December 2004, were included in this cohort study and followed for approx...

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Veröffentlicht in:PloS one 2013-12, Vol.8 (12), p.e82476
Hauptverfasser: Cao, Xiaobin, Wu, Zunyou, Li, Li, Pang, Lin, Rou, Keming, Wang, Changhe, Luo, Wei, Yin, Wenyuan, Li, Jianhua, McGoogan, Jennifer M
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creator Cao, Xiaobin
Wu, Zunyou
Li, Li
Pang, Lin
Rou, Keming
Wang, Changhe
Luo, Wei
Yin, Wenyuan
Li, Jianhua
McGoogan, Jennifer M
description To assess the overall mortality of methadone maintenance treatment (MMT) clients in China and its associated factors. A total of 1,511 MMT clients, all of whom enrolled in China's first eight MMT clinics between March and December 2004, were included in this cohort study and followed for approximately six years, until June 2010. Mortality and its predictors were examined using Cox proportional hazards regression models. A total of 154 deaths were observed within 5,391 person-years (PY) of follow-up for an all-cause mortality rate of 28.6 per 1,000 PY. The leading causes of death were drug overdose (33.8%), HIV/AIDS-unrelated disease (21.4%), and HIV/AIDS (16.9%). The all-cause mortality rate of clients engaged in MMT for one year or less was roughly three times that of clients who stayed in MMT for four years or more (14.0 vs. 4.6, p
doi_str_mv 10.1371/journal.pone.0082476
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A total of 1,511 MMT clients, all of whom enrolled in China's first eight MMT clinics between March and December 2004, were included in this cohort study and followed for approximately six years, until June 2010. Mortality and its predictors were examined using Cox proportional hazards regression models. A total of 154 deaths were observed within 5,391 person-years (PY) of follow-up for an all-cause mortality rate of 28.6 per 1,000 PY. The leading causes of death were drug overdose (33.8%), HIV/AIDS-unrelated disease (21.4%), and HIV/AIDS (16.9%). The all-cause mortality rate of clients engaged in MMT for one year or less was roughly three times that of clients who stayed in MMT for four years or more (14.0 vs. 4.6, p<0.0001), HIV-positive subjects was nearly four times mortality rate than that of HIV-negative individuals (28.1 vs.6.8, p<0.0001). ART-naive HIV-positive subjects had approximately two times higher mortality rate than those receiving ART (31.2 vs. 17.3, <0.0001). After adjusting for confounding variables, we found that being male (HR = 1.63, CI: 1.03-2.57, p = 0.0355) and being HIV-positive (HR = 5.16, CI: 3.70-7.10, p<0.0001) were both associated with higher risk of death whereas increased durations of methadone treatment were associated with a lower risk of death (HR = 0.26, CI: 0.18-0.38, p<0.0001 for two to three years, HR = 0.08, CI: 0.05-0.14, p<0.0001 for four or more years). Overall mortality was high among MMT clients in China. Specific interventions aimed at decreasing mortality among MMT clients are needed. Our study supports the need for keeping client at MMT longer and for expanding ART coverage and suggests the potential benefits of integrated MMT and ART services for drug users in China.]]></description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0082476</identifier><identifier>PMID: 24349294</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Acquired immune deficiency syndrome ; Adolescent ; Adult ; AIDS ; Analysis ; Antiretroviral drugs ; Antiretroviral therapy ; Cause of Death ; Central nervous system depressants ; China - epidemiology ; Clients ; Cohort analysis ; Cohort Studies ; Death ; Drug abuse ; Drug use ; Female ; Follow-Up Studies ; Hazards ; Health aspects ; HIV ; Human immunodeficiency virus ; Humans ; Male ; Medical screening ; Methadone ; Mortality ; National Health Programs ; Opiate Substitution Treatment ; Opioid-Related Disorders - epidemiology ; Opioid-Related Disorders - mortality ; Opioid-Related Disorders - rehabilitation ; Overdose ; Regression analysis ; Regression models ; Risk Factors ; Sex Factors ; Young Adult</subject><ispartof>PloS one, 2013-12, Vol.8 (12), p.e82476</ispartof><rights>COPYRIGHT 2013 Public Library of Science</rights><rights>2013 Cao et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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A total of 1,511 MMT clients, all of whom enrolled in China's first eight MMT clinics between March and December 2004, were included in this cohort study and followed for approximately six years, until June 2010. Mortality and its predictors were examined using Cox proportional hazards regression models. A total of 154 deaths were observed within 5,391 person-years (PY) of follow-up for an all-cause mortality rate of 28.6 per 1,000 PY. The leading causes of death were drug overdose (33.8%), HIV/AIDS-unrelated disease (21.4%), and HIV/AIDS (16.9%). The all-cause mortality rate of clients engaged in MMT for one year or less was roughly three times that of clients who stayed in MMT for four years or more (14.0 vs. 4.6, p<0.0001), HIV-positive subjects was nearly four times mortality rate than that of HIV-negative individuals (28.1 vs.6.8, p<0.0001). ART-naive HIV-positive subjects had approximately two times higher mortality rate than those receiving ART (31.2 vs. 17.3, <0.0001). After adjusting for confounding variables, we found that being male (HR = 1.63, CI: 1.03-2.57, p = 0.0355) and being HIV-positive (HR = 5.16, CI: 3.70-7.10, p<0.0001) were both associated with higher risk of death whereas increased durations of methadone treatment were associated with a lower risk of death (HR = 0.26, CI: 0.18-0.38, p<0.0001 for two to three years, HR = 0.08, CI: 0.05-0.14, p<0.0001 for four or more years). Overall mortality was high among MMT clients in China. Specific interventions aimed at decreasing mortality among MMT clients are needed. Our study supports the need for keeping client at MMT longer and for expanding ART coverage and suggests the potential benefits of integrated MMT and ART services for drug users in China.]]></description><subject>Acquired immune deficiency syndrome</subject><subject>Adolescent</subject><subject>Adult</subject><subject>AIDS</subject><subject>Analysis</subject><subject>Antiretroviral drugs</subject><subject>Antiretroviral therapy</subject><subject>Cause of Death</subject><subject>Central nervous system depressants</subject><subject>China - epidemiology</subject><subject>Clients</subject><subject>Cohort analysis</subject><subject>Cohort Studies</subject><subject>Death</subject><subject>Drug abuse</subject><subject>Drug use</subject><subject>Female</subject><subject>Follow-Up Studies</subject><subject>Hazards</subject><subject>Health aspects</subject><subject>HIV</subject><subject>Human immunodeficiency virus</subject><subject>Humans</subject><subject>Male</subject><subject>Medical screening</subject><subject>Methadone</subject><subject>Mortality</subject><subject>National Health Programs</subject><subject>Opiate Substitution Treatment</subject><subject>Opioid-Related Disorders - epidemiology</subject><subject>Opioid-Related Disorders - mortality</subject><subject>Opioid-Related Disorders - rehabilitation</subject><subject>Overdose</subject><subject>Regression analysis</subject><subject>Regression models</subject><subject>Risk Factors</subject><subject>Sex Factors</subject><subject>Young Adult</subject><issn>1932-6203</issn><issn>1932-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><sourceid>DOA</sourceid><recordid>eNqNkl2L1DAUhoso7rr6D0QLguDFjPlq0nohLIMfAysDft2GND2dZmiT2SSVnX9v1ukuU1CQXCQkz3nP4c2bZc8xWmIq8NudG71V_XLvLCwRKgkT_EF2jitKFpwg-vDkfJY9CWGHUEFLzh9nZ4RRVpGKnWebL85H1Zt4yNXg7DYfIHaqSZr5oIyNYJXVkOvegI0hNzZfdcaqd7nKg7lZHED5XLsuieQhjs3hafaoVX2AZ9N-kf34-OH76vPiavNpvbq8WmhekbjQGoC2TGloGK9qIQhQKKHQoiKibkkhEGsbgVGl61Y0raparAjlleYalbygF9nLo-6-d0FOXgSJGRdclJjjRKyPROPUTu69GZQ_SKeM_HPh_FYqH43uQQIpNKpLVgFFjFJWp8EKUReiYiw1E0nr_dRtrAdodPLCq34mOn-xppNb90smvzFDNAm8mgS8ux4hxH-MPFFblaYytnVJTA8maHnJREkxEqxM1PIvVFoNDEann2tNup8VvJkVJCbCTdyqMQS5_vb1_9nNzzn7-oTtQPWxC64fo3E2zEF2BLV3IXho753DSN6G-c4NeRtmOYU5lb04df2-6C699DdU0u8F</recordid><startdate>20131212</startdate><enddate>20131212</enddate><creator>Cao, Xiaobin</creator><creator>Wu, Zunyou</creator><creator>Li, Li</creator><creator>Pang, Lin</creator><creator>Rou, Keming</creator><creator>Wang, Changhe</creator><creator>Luo, Wei</creator><creator>Yin, Wenyuan</creator><creator>Li, Jianhua</creator><creator>McGoogan, Jennifer M</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>IOV</scope><scope>ISR</scope><scope>3V.</scope><scope>7QG</scope><scope>7QL</scope><scope>7QO</scope><scope>7RV</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TG</scope><scope>7TM</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>KB0</scope><scope>KL.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>M7S</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>RC3</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20131212</creationdate><title>Mortality among methadone maintenance clients in China: a six-year cohort study</title><author>Cao, Xiaobin ; 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A total of 1,511 MMT clients, all of whom enrolled in China's first eight MMT clinics between March and December 2004, were included in this cohort study and followed for approximately six years, until June 2010. Mortality and its predictors were examined using Cox proportional hazards regression models. A total of 154 deaths were observed within 5,391 person-years (PY) of follow-up for an all-cause mortality rate of 28.6 per 1,000 PY. The leading causes of death were drug overdose (33.8%), HIV/AIDS-unrelated disease (21.4%), and HIV/AIDS (16.9%). The all-cause mortality rate of clients engaged in MMT for one year or less was roughly three times that of clients who stayed in MMT for four years or more (14.0 vs. 4.6, p<0.0001), HIV-positive subjects was nearly four times mortality rate than that of HIV-negative individuals (28.1 vs.6.8, p<0.0001). ART-naive HIV-positive subjects had approximately two times higher mortality rate than those receiving ART (31.2 vs. 17.3, <0.0001). After adjusting for confounding variables, we found that being male (HR = 1.63, CI: 1.03-2.57, p = 0.0355) and being HIV-positive (HR = 5.16, CI: 3.70-7.10, p<0.0001) were both associated with higher risk of death whereas increased durations of methadone treatment were associated with a lower risk of death (HR = 0.26, CI: 0.18-0.38, p<0.0001 for two to three years, HR = 0.08, CI: 0.05-0.14, p<0.0001 for four or more years). Overall mortality was high among MMT clients in China. Specific interventions aimed at decreasing mortality among MMT clients are needed. Our study supports the need for keeping client at MMT longer and for expanding ART coverage and suggests the potential benefits of integrated MMT and ART services for drug users in China.]]></abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24349294</pmid><doi>10.1371/journal.pone.0082476</doi><tpages>e82476</tpages><oa>free_for_read</oa></addata></record>
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subjects Acquired immune deficiency syndrome
Adolescent
Adult
AIDS
Analysis
Antiretroviral drugs
Antiretroviral therapy
Cause of Death
Central nervous system depressants
China - epidemiology
Clients
Cohort analysis
Cohort Studies
Death
Drug abuse
Drug use
Female
Follow-Up Studies
Hazards
Health aspects
HIV
Human immunodeficiency virus
Humans
Male
Medical screening
Methadone
Mortality
National Health Programs
Opiate Substitution Treatment
Opioid-Related Disorders - epidemiology
Opioid-Related Disorders - mortality
Opioid-Related Disorders - rehabilitation
Overdose
Regression analysis
Regression models
Risk Factors
Sex Factors
Young Adult
title Mortality among methadone maintenance clients in China: a six-year cohort study
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