Richard Rawson, Ph.D. Valerie Pearce, M.P.H. Rachel Gonzales, Ph.D. Julie Brummer, B.A. UCLA Integrated Substance Abuse Programs May 8, 2007 Treatment.

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Presentation transcript:

Richard Rawson, Ph.D. Valerie Pearce, M.P.H. Rachel Gonzales, Ph.D. Julie Brummer, B.A. UCLA Integrated Substance Abuse Programs May 8, 2007 Treatment Impact on HIV Risk Behavior Among Methamphetamine Users

Does treatment reduce HIV risk behavior? (injection and unsafe sexual practices) Research Question Changes from Baseline to Treatment-End

The Methamphetamine Treatment Project (MTP) - AIDS Risk Assessment (TCU/ARU) Methamphetamine Clinical Trials Group (MCTG) - HIV Risk Behavior Scale (HRBS) Treatment Data

Study Designs MTP: Multisite 1-year clinical trial (N=978): 16 week treatments (Matrix vs. Treatment-as-usual) in 8 treatment programs within Montana, Hawaii, and California funded by SAMHSA/CSAT. MCTG: Multisite study includes two MA pharmacotherapy trials (N=320) within Texas, Missouri, Iowa, Honolulu, and California (Ondansetron and Bupropion) funded by NIDA. Length of treatment varied per protocol (8 weeks and 12 weeks)

Baseline Demographics MTP (N=784) MCTG (N=320) % Female51.1%34.4% Average Age32.8 (18-60)36.0 (18-59) Mean Years Education12.2 (sd=1.7)12.0 % White65.5%73.3% Mean Years of MA use7.5 (sd=6.0)11.2 (sd=7.7) Sample Demographics

BaselineTx-end MTP: # of people injected in past 30 days* 128 (13.1%) 54 (5.4%) MCTG: # of people injected in past 30 days* 68 (21.2%) 24 (10.3%) Change in Injection Use *p<.05

Repeated measures on 193 injectors Past 30 days BaselineTx-end Mean # times inject** Mean # times dirty needles** Mean # times share cooker, cotton, etc.** MTP: Change in Injection Practices **p<.01

Repeated measures on 44 injectors Past 30 days Baseline (N=44) Tx-end (N=24) Number of injectors who used needles after someone 7(16%)0 (0%) Number of injectors who reused needles 22 (50%)9 (38%) Number of injectors who reused needles AND cleaned with bleach every time 3/22 (14%) 3/9 (33%) MCTG: Change in Injection Practices

Repeated measures on 784 MA users Past 30 days BaselineTx-end Mean times had sex w/out condoms Mean # times sex w/out condom w/IV user * Mean # times sex w/out condom w/ MA user** Mean times sex while high*** Mean risk composite (# of times engaged in risky behavior)** MTP: Change in Risky Sexual Practices *p<.05 **p<.01 ; ***p<.001

Repeated measures on 199 MA users Past 30 days BaselineTx-end Unsafe sexual behavior mean composite score* MCTG: Change in Risky Sexual Practices *p<.05

Significant reduction in mean # of risky behaviors from baseline to 3 year follow-up among 574 MA users from MTP. MTP: Long-Term Change Risk Behavior

MTP: Treatment Impact on Risky Behavior Longer treatment retention is significantly associated with less risky behavior (based on sex risk score) among MA users (B=-.043, p<.001). Treatment completion is significantly related to less risky sexual behavior among MA users (B=-.565, p<.001). Significant reduction in injection behavior for completers than non-completers (p<.05).

MCTG: Treatment Impact on Risky Behavior Paired samples t-tests show that treatment completion had a statistically significant impact on reducing high sex risk behavior compared to those who did not complete treatment (p<.01 ). Treatment completion was significantly associated with reducing injection use (p<.05): Over half of the injectors who completed treatment reported no current injection use at discharge compared to no reduction in injection for non- completers.

My Sexual Performance is Improved by the use of: (Rawson et al., 2002)

Methamphetamine in RSA* The use of methamphetamine (‘tik’) and methcathinone is on the increase in South Africa, especially in Cape Town. In treatment centres in Capetown, treatment admission rates for MA have increased from 3% in 2002 to 32.4% in Most of the patients (92%) were Coloured, 7% were White, 0.5 Indian/Asian and 0.5% were Black/African. Almost 50% of the patients were younger than 20 years of age (see Figure 2). The ages ranged from 12 to 53 years. 90+% report smoking methamphetamine as the preferred route of administration. 41% report daily use. *Parry et al 2005

Study Implications MA treatment is associated with substantial reductions in HIV risk behaviors. Retention and treatment completion play a critical role in preventing the escalation of HIV risk behaviors.

Acknowledgements Investigators of the NIDA Methamphetamine Clinical Trials Group and the CSAT Methamphetamine Treatment Project Funding from NIDA and SAMHSA