HIV Risk Perception and Risky Behavior Among People Who Inject Drugs in Kermanshah, Western Iran

Predictors of COVID-19 vaccine uptake among people who use substances: a case study in Tehran

BACKGROUND

Vaccination is one of the most effective ways to manage infectious disease epidemics such as Covid-19. However, the low rates of vaccination in populations at risk including people using illicit substances, hinders the effectiveness of preventive vaccines in reducing transmission. The aim of this study was to investigate the rate of Covid-19 vaccination and its related factors among people who use substances in Tehran, Iran.

METHODS

Between July and December 2022, 386 people who use substances aged ≥ 18 years old were recruited by convenience street-based sampling in Tehran. The outcome variable in this study was self-reported completion of at least two doses of the Covid-19 vaccine. Logistic regression was used to investigate the factors related to Covid-19 vaccination. Data were analyzed using SPSS software version 20 at the 0.05 level of significance. As a measure of risk, 95% Confidence interval (CI) was used. The level of significance was considered at 0.05.

RESULTS

Almost three-quarters (n = 286) of the participants reported receiving at least two doses of the Covid-19 vaccine (95% CI, 70.2-79.3). Those participants with high school diplomas were 1.17 times more likely than less educated participants to report having had 2 vaccinations (OR of 1.17, CI 95%: 1.03-1.81). Participants with a higher mean score of having a positive attitude towards Covid-19 vaccination were more likely to have received a vaccination (OR of 1.12, CI 95%: 1.08-1.17). Ethnicity was also an influential variable, people with non-Fars ethnicity were less likely to be vaccinated than those of Fars ethnicity (OR of 0.33, CI 95%: 0.13-0.81). People with higher-than-average monthly income were more likely to report vaccination than those with low monthly incomes (OR of 1.27, CI 95%: 1.09-1.8). Also, participants reporting less access to vaccination centers had a lower chance of reporting having been vaccinated than those who reported high access to vaccination centers (OR of .17, CI 95%: .08-.36).

CONCLUSIONS

Covid-19 vaccine uptake was found to be relatively high among people using illicit substances in this study. Higher levels of education, Fars ethnicity, higher income levels, having a positive attitude towards vaccination and access to vaccination centers were the most important predictors of Covid-19 vaccination in this study.

Prevalence of mental health conditions among people living with HIV during the COVID-19 pandemic: A rapid systematic review and meta-analysis

Background

The COVID‐19 pandemic has generated many mental health problems worldwide. People living with HIV (henceforth known as PLHIV) bear a higher mental health burden in comparison with the general population. Therefore, their risk of mental health problems may be elevated during the pandemic.

Methods

We conducted a systematic review and meta‐analysis to assess the prevalence of depression, anxiety, psychological stress, insomnia and loneliness among PLHIV during the COVID‐19 pandemic. Observational studies in four databases published from 1 January 2020 to 30 April 2021 investigating the prevalence of mental health conditions during the COVID‐19 pandemic were searched, and 197 articles were retrieved. After the processes of duplication removal, eligibility screening and full‐text assessment, 10 articles were included in the systematic review and six articles for meta‐analyses. A random‐effects model was applied to derive the pooled prevalence of mental health conditions. The risk of bias was assessed using the STROBE checklist.

Results

Overall, the pooled prevalence rates of (moderate‐to‐severe) depression and anxiety among PLHIV were 16.9% [95% confidence interval (CI): 3.8%–30.0%] and 23.0% (95% CI: 12.0%–34.0%), respectively.

Conclusions

More research is needed to investigate the mechanism by which the pandemic affects the mental health of PLHIV. Support and programmes are needed to ameliorate the mental health problems in this marginalized population.

HIV testing and its associated factors among street-based female sex workers in Iran: results of a national rapid assessment and response survey

Background

Female sex workers (FSWs) are at a disproportionate risk of sexually transmitted infections and they may face significant barriers to HIV testing. This study aimed to examine HIV testing prevalence and its associated factors among street-based FSWs in Iran.

Method

A total of 898 FSWs were recruited from 414 venues across 19 major cities in Iran between October 2016 and March 2017. Eligible FSWs were women aged 18 years of age who had at least one commercial sexual intercourse in the previous year. HIV testing was defined as having tested for HIV in the lifetime. Bivariable and multivariable logistic regression were used to examine the correlates of HIV testing. We report adjusted odds ratios (aOR) and their 95% confidence intervals (CI).

Result

Overall, 57.8% (95%CI: 20.0, 88.0) of participants reported having tested for HIV, and HIV prevalence among FSWs who tested for HIV was 10.3% (95%CI: 7.5, 13.0). The multivariable model showed that unstable housing (aOR: 8.86, 95%CI: 2.68, 29.32) and drug use (aOR: 3.47, 95%CI: 1.33, 9.06) were associated with increased likelihood of HIV testing. However, FSWs with a higher level of income were less likely to be tested for HIV (aOR: 0.09, 95%CI: 0.02, 0.43).

Conclusion

Almost one in ten street-based FSWs had never tested for HIV. These findings suggest the need for evidence-based strategies such as outreach support and HIV self-testing to improve HIV testing in this marginalized population.

Drug injection and associated factors among the elderly living with HIV/AIDS in Tehran, Iran

Background: Injection of drugs is one of the most serious health problems among Iranian living with HIV/AIDS. The injection of drugs, accounting for the transmission of more than two-thirds of HIV infections. HIV remains a major concern around the world and is expected to be the third leading cause of mortality worldwide. Thus, the aim of this study was to explore the predictors of injection drug use in the elderly patients living with HIV/AIDS. Methods: This was a cross-sectional study executed in Tehran City, Iran, in 2018. A total of 160 individuals aged 60 years and older with HIV from different counseling centers were selected by convenience sampling. Data were collected using questionnaires including a positive state of mind, coping, social support, and a checklist of demographical variables. Bivariate analysis and multiple logistic regression using SPSS software version 21.0 were employed to determine factors associated with drug injection. The statistical tests were performed with a significance level of 5% (p≥0.05). Results: The study participants' mean(SD) age was 65.6(±6.6) years. In total, 33 people (20.6%) of the samples reported injection drug use. The frequency of injection drug use was greater among men (AOR: 2.28, 95% CI 2.2-22.8; p=0.010), those reporting a monthly income of ≥30000000 Rials (AOR: 31.56, 95% CI 2.95-338; p=0.004), subjects with past experience of drug use (AOR: 7.11, 95% CI 2.18-23.2; p=0.001), those with ≥2 years past from their HIV diagnosis (AOR: 4.04, 95% CI 1.12-14.58; p=0.033), and those living with more than two people in one residential place (Household size AOR: 5.9, 95% CI 1.64-21.24; p=0.007). Conclusion: It seems that the design and implementation of harm reduction programs among the elderly with HIV/AIDS who inject drugs are essential and should be considered as an agenda of policymakers and health professionals.

Investigating the contributing factors to HIV/AIDS infection from the perspective of HIV-infected patients

Background

People with HIV have always faced stigma and discrimination. Given the numerous papers that have addressed the psychological and social risk factors in spreading HIV, a pressing question is whether individuals’ mere careless and behavioural flaws can still account for the spread of HIV. Barriers and opposing politic made a hard position for HIV and sex education in Iran.

Methods

The present study investigated the causes of contracting HIV/AIDS from the perspective of HIV-infected patients. To accomplish this, 150 patients referring to the voluntary counseling and testing Center, Shiraz were convenient selected based on the convenient sampling method and responded to a researcher-made questionnaire From June to August 2019. The data were analyzed through descriptive statistics (mean, SD, frequency tables) and inferential statistics (chi-square).

Results

Results revealed that the main cause of HIV infection amongst males was the injection of narcotics, and in the females it was sexual intercourse with an infected individual. Meanwhile, 57% of the females and 66% of the males blamed themselves for contracting and transmitting the disease. The patients stated that if they could return to pre-infection period, they would use one of the following ways to prevent the disease: (a) they would pay attention to hygienic/sanitary principles; (b) they would not get married; and (c) they would prevent drug addiction. Also only 44% of the individuals had successful siblings (those who were neither addicts nor HIV/AIDS-infected individuals), which was an observation that emphasizes on the epidemic of high-risk behaviors in the patients’ families.

Conclusions

According to participants' statements collected in our study, weakness in governmental public health education, along with family-related and individual factors, are important causes of HIV spread

Harm reduction program and hepatitis C prevalence in people who inject drugs (PWID) in Iran: an updated systematic review and cumulative meta-analysis

BACKGROUND

Prevalence of hepatitis C virus (HCV) infection among people who inject drugs (PWID) in Iran is high. Since 2005, the Iranian government has implemented a harm reduction program to control HCV. We aimed to describe the prevalence of HCV antibody (Ab) in Iranian PWID before and after the implementation of harm reduction with cumulative meta-analysis.

METHODS

Following PRISMA guidelines, we conducted a systematic review and meta-analysis of studies published on the seroprevalence of HCV among PWID. We systematically reviewed the literature to identify eligible studies up to December 2018 in international and national databases. Pooled prevalence and 95% confidence intervals were calculated using Der Simonian and Laird method, taking into account conceptual heterogeneity. Subgroup analyses were performed by harm reduction implementation and studies' characteristics to assess the sources of heterogeneity. We used Cochran-Armitage test for the linear trend of the prevalence of HCV Ab among PWID.

RESULTS

We reviewed 5966 papers and reports and extracted data from 62 eligible records. The pooled HCV Ab prevalence among PWID in Iran was 46.5% (95% confidence interval [95% CI] 41.1-52.0%). Overall, the Cochran-Armitage test for trend indicated a significant decreasing trend of HCV Ab prevalence (P = 0.04). The cumulative meta-analysis showed a slight decline in the prevalence of HCV Ab between the years 2005 and 2018.

CONCLUSIONS

The HCV Ab prevalence among PWID in Iran is high, with a considerable geographical variation. The prevalence of HCV Ab among PWID in Iran slightly decreased after 2005 which could be, at least to some extent, related to the implementation of extensive harm reduction programs in the country.

Methamphetamine use and HIV risk behavior among men who inject drugs: causal inference using coarsened exact matching

BACKGROUND

Understanding the association between methamphetamine (MA) use and HIV risk behavior among people who inject drugs (PWID) will assist policy-makers and program managers to sharpen the focus of HIV prevention interventions. This study examines the relationship between MA use and HIV risk behavior among men who inject drugs (MWID) in Tehran, Iran, using coarsened exact matching (CEM).

METHODS

Data for these analyses were derived from a cross-sectional study conducted between June and July 2016. We assessed three outcomes of interest-all treated as binary variables, including distributive and receptive needle and syringe (NS) sharing and condomless sex during the month before interview. Our primary exposure of interest was whether study participants reported any MA use in the month prior to the interview. Firstly, we report the descriptive statistics for the pooled samples and matched sub-samples using CEM. The pooled and matched estimates of the associations and their 95% CI were estimated using a logistic regression model.

RESULTS

Overall, 500 MWID aged between 18 and 63 years (mean = 28.44, SD = 7.22) were recruited. Imbalances in the measured demographic characteristics and risk behaviors between MA users and non-users were attenuated using matching. In the matched samples, the regression models showed participants who reported MA use were 1.82 times more likely to report condomless sex (OR = 1.82 95% CI 1.51, 4.10; P = 0.031), and 1.35 times more likely to report distributive NS sharing in the past 30 days, as compared to MA non-users (OR = 1.35 95% CI 1.15-1.81). Finally, there was a statistically significant relationship between MA use and receptive NS sharing in the past month. People who use MA in the last month had higher odds of receptive NS sharing when compared to MA non-users (OR = 4.2 95% CI 2.7, 7.5; P = 0.013).

CONCLUSIONS

Our results show a significant relationship between MA use and HIV risk behavior among MWID in Tehran, Iran. MA use was related with increased NS sharing, which is associated with higher risk for HIV exposure and transmission.

Development and evidence of validity of the HIV risk perception scale for young adults in a Hispanic-American context

HIV/AIDS is a public health problem that is transmitted through risky sexual behavior. The literature suggests that the perception of HIV risk is a motivator for the prevention of risky sexual behaviors. There is no culturally adapted scale to assess HIV risk perception in the Hispanic-American population. The aim of this research was to develop a scale to assess HIV risk perception in Hispanic-American young adults. A cross-sectional instrumental design was used, with a sample of students from the Chilean city with the highest HIV rates. Participants (n = 524) were between 18 and 33 years old, of whom 51% were women, 84.4% said they were heterosexual and 43.7% said they had not been tested for HIV/AIDS. The final scale has 9 items and 2 dimensions: (1) perceived risk susceptibility and (2) perceived risk severity. The results showed that the identified structure provided adequate levels of reliability (ω > .8) and presented evidence of validity, based on the internal structure of the test (i.e., using ESEM) and on the relationship with other variables (i.e., the sexual risk behaviors scale). In addition, the results showed strong invariance between the scores for men and women. It is concluded that the HIV risk perception scale has adequate psychometric properties to assess HIV risk perception in equivalent samples.

Dental caries and periodontal disease among people who use drugs: a systematic review and meta-analysis

BACKGROUND

The aim of our study was to perform a systematic review of the literature and meta-analysis in order to investigate relationship between drug use and oral health.

METHODS

We searched for studies in English published before July 1, 2019 on PsycINFO, PubMed, SciELO, Scopus, and Web of Science. We assessed the relationship between drug use (methamphetamines, heroin; opiates; crack, cocaine and cannabis as dependent variables) and reported tooth loss, periodontal disease, or decayed, missing, and filled teeth index as an independent variable. The data were analyzed using Stata 12.0 software.

RESULTS

We initially identified 1836 potential articles (with 1100 duplicates) and screened the remaining 736 titles and abstracts, comprising 54 studies. In the next step, we evaluated the full-texts; 44 studies were excluded, accordingly. In total, we included 10 publications in the meta-analysis. Drug type was associated with periodontal disease (OR 1.44; 95% CI 0.8-2.6) and pooled estimates showed that type of drug used increased the odds of the number of decayed, missed and filled teeth (DMFT) (OR 4.11; 95% CI 2.07-8.15) respectively.

CONCLUSIONS

The analytical challenges of segregating the impact of individual drug types on oral health diseases mean that investigations on the direct relationship between oral health status and drug use are limited. Developing programs to improve potential confounding with various substances and addressing the dental health needs of people who use drugs is vital if we are to improve their overall quality of life.

HIV and drug related stigma and risk-taking behaviors among people who inject drugs: a systematic review and meta-analysis

The impact of HIV-related stigma on people living with HIV has been well documented, but there have been few studies examining how drug-related stigma impacts risk-taking in the lives of people who inject drugs (PWID). This meta-analysis aimed to determine HIV and drug-related stigma and the association it has with risk-taking behaviors among PWID. We searched PubMed, Science Direct, Web of Science, and Cochrane electronic databases independently in March 2019. After reviewing for any study duplicates the full-text of selected articles were assessed for eligibility using Population, Intervention, Comparator, Outcomes (PICO) criteria. We used fixed and random-effects meta-analysis models to estimate the pooled prevalence, pooled odds ratio (OR) and 95% confidence intervals. After a detailed assessment, a total of 14 studies containing 13,689 participants met the eligibility criteria. Among the potential risk factors: employment status, depression and sharing injecting paraphernalia had a significant relationship with HIV and drug stigma among PWIDs respectively (OR = 0.78, 95%CI = 0.62-0.98), (OR = 1.84, 95%CI = 1.45-2.33) and (OR = 2.20, 95%CI = 1.84-1.63). Illicit drug use related stigma was found to be associated with several concurrent effects. The impact of stigma should be considered in the development of drug use prevention strategies. Perceived stigma is correlated with numerous negative consequences in other populations including people living with HIV/AIDS. These data suggest this could also be generalized to people who inject drugs because it seems that individuals with internalized stigma experience drug dependence, reduced comfort in seeking help from services and higher rates of depression.

HIV risk perception and sexual behaviors among female sex workers in Tehran, Iran

Background: An adequate perception of the degree to which one is at risk of having or contracting HIV is necessary for behavioural change and the adoption of safe behaviours. There are limited data regarding HIV risk perceptions among female sex workers in Iran. This study aimed to determine the HIV risk perception status and its association with sexual behaviours among female sex workers in Tehran. Methods: A cross sectional study was conducted among 170 female sex workers in Tehran. Participants were recruited using a combination of snowball, purposeful, and convenience sampling methods. Multiple logistic regression was used to identify adjusted associations between background factors, sexual behaviours, and HIV risk perception. The analysis was conducted by the "logistf" package in the R statistical system. P-value less than .05 was considered as statistically significant. Results: Among the participants, 122 (77%) reported high HIV risk perception. Most female sex workers with high HIV risk perception reported that they did not consistently use condoms (n=120, 98%. Female sex workers with a higher frequency of sex work (AOR=1.18, 95% CI: 1.08, 1.31), inconsistent condom use (AOR=0.15, 95% CI: 0.02, 0.66), a history of HIV testing (AOR=5.1, 95% CI: 1.2, 26.0), and low HIV knowledge (AOR=0.97, 95% CI=0.95, 0.996) were more likely to report high HIV risk perception. Conclusion: Most female sex workers with risky sexual behaviours had a high HIV risk perception. Effective educational programs are suggested to enable female sex workers to correctly assess their own HIV risk and change risk behaviors based on self-assessment of actual risk.

Needle and Syringe Programs and HIV-Related Risk Behaviors Among Men Who Inject Drugs: A Multilevel Analysis of Two Cities in Iran

BACKGROUND

Many studies have found significant differences in HIV risk at the community and socioeconomic levels. However, few have considered variations in needle and syringe program (Jin et al., Oral Dis. 1;22(7):609-19) coverage and other community characteristics on HIV risk behaviors among people who inject drugs (PWIDs). Our objective was to study the relationship between individual factors and city-level characteristics (such as the city's coverage of harm reduction programs) on HIV risk behavior among PWID residing in two cities in Iran.

METHODS

The study was conducted from March to August 2016 in Tehran and Kermanshah provinces. One thousand PWID were recruited by a convenience sampling recruitment at local NSP Drop-in Centers (DIC) and through "snowball sampling" (i.e., using peers to refer participants to the study). We first examined associations between individual-level variables and HIV risk behaviors in bivariate analysis using the chi-square or Fisher's exact tests, as appropriate. Next, multi-level models were constructed to determine the amount of variability in HIV risk behavior that could be accounted for by individual- and community-level characteristics. Variables with p value < 0.2 were included in the multiple logistic regression model.

RESULTS

The results of the multilevel modeling showed that 32% of the variability in HIV risk behaviors among PWID could be explained by factors that differed between the two cities. When individual factors including higher HIV knowledge, access to NSP, higher HIV risk perception, and methamphetamine use were all included in the final model, 22% of the variability in HIV risk behaviors could be explained to city-level variables.

CONCLUSION

Findings suggest that expanding the accessibility (i.e., hours and venues) and community-level coverage of NSP services by establishing programs where PWID congregate might reduce HIV risk behavior among PWID.

Comparing Injecting Risk Behaviors of Long-Term Injectors with New Injectors in Tehran, Iran

BACKGROUND

Global estimates suggest there are 15.6 million people who inject drugs (PWID) of whom 17.8% are living with HIV.Few studies have characterized newly-onset injectors with long-term injectors and its association with injecting risk behaviors.

OBJECTIVES

We examined the relationship between length of injection and risk behaviors among people who inject drugs (PWID) in Tehran, Iran.

METHODS

A cross-sectional study was conducted among PWID, from March to August 2016 in Tehran, Iran. PWID were recruited by convenience and snowball sampling from five Drop-in Centers (DIC) located in the south of Tehran. Our primary independent variable was length of injecting career, defined as the number of months since injecting initiation. Those defined as new injectors (were injecting for less than 18 months), and long-term injectors (as injecting drugs for more than 18 months). We reported the adjusted odds ratio (aOR) point estimate and 95% confidence interval (CI95%) as the effect measure. The level of significance used in multiple logistic regression model was 0.05. We used STATA v. 11 for all analyzes.

RESULTS

The analytical sample comprised of 500 participants (100% male). Mean (±SD) age of PWID with a length of injection history was 31.2 ± 7.2 years. Overall, 270 (54%) (CI95%: 49.6%, 58.4%) of participants were long-term injectors. The average age of drug use initiation among long-term injectors group was lower as compared to new injectors group (31.2 vs. 29.4, p < 0.001). The odds of distributive syringe sharing among new injectors were two times higher than long-term injectors (AOR = 2.1, 95% CI 1.4-4.7). The odds of receptive syringe sharing were lower among new injectors group (AOR = 0.7, CI95% 0.2-0.87), compared to long-term injectors. New injectors had higher odds of reusing their own syringes (OR = 2.8, 95% CI: 1.4-5.7; p = 0.01).

CONCLUSIONS

Improvements in harm reduction service provision can occur through taregted risk reduction education for new injectors focusing on reducing distributive syringe sharing among them.

Decomposition of Economic Inequality in Needle and Syringe Programs Utilization to its Determinants among Men Who Inject Drugs in Tehran using Blinder-Oaxaca Decomposition Method

BACKGROUND

According to latest available data there are more of 300,000 people injects drug users (PWID) in Iran.

OBJECTIVES

In this study, we used a Blinder-Oaxaca (BO) decomposition to explore the relative contributions of inequality in utilization of NSPs and to decompose it to its determinants in Teheran.

METHODS

We used data from a cross-sectional survey using snowball sampling to recruit 500 PWID from June to July 2016 in Tehran. Participants were reported injecting drug use in the past month, were able to speak and comprehend Farsi enough to respond to survey questions, and were able to provide informed consent to complete the interview. We used a BO method to decompose the role of economic inequality on utilization of needle and syringe programs.

RESULTS

A total 520 of clients participated in the study of which data was fully complete for 500. The selected predictor variables (age, education level, marital status, homelessness, HIV risk perception, and HIV knowledge) together explain 54% (8.5% out of 16%) of total inequality in utilization of needle and syringe programs and the remaining 46% constitute the unexplained residual. HIV risk perception status contributed about 38% (3.3% out of 8.5%) to the total health inequality, followed by HIV knowledge (26%) and education level were contributed 20% each, respectively.

CONCLUSION

The results showed that contribution of economic inequalities in utilization of NSPs was primarily explained by the differential effects of HIV risk perception and HIV knowledge among PWID. Reducing HIV risk perception and increasing HIV knowledge might be essential to efforts to eliminate inequalities in access to NSPs among PWID.

Prevalence and risk factors for injection site skin infections among people who inject drugs (PWID) in Tehran

BACKGROUND/OBJECTIVES

Injection drug use is one of the major public health problems in Iran. Injection drug use is associated with numerous negative health outcomes, such as blood-borne infections (HIV, HCV) and injection site skin infections (abscesses, cellulitis). The aim of this study was to determine prevalence of injection site skin infections and its associated risk factors among people who inject drugs (PWID) in Tehran, Iran.

METHODS

The cross-sectional study was conducted from March to August 2016 in Tehran province. A total of 500 PWID were recruited by convenience and snowball sampling from Drop-in Centers (DIC) in the South of Tehran. Our primary outcomes were self-report of ever having injection sites skin infections and receiving treatment for them. We first examined associations between individual variables and lifetime history of having injection site infections in bivariate analysis using the chi-square or Fisher's exact tests, as appropriate. Variables with P-value <.2 were included in a multiple logistic regression model.

RESULTS

Overall, 40% (CI95%: 30.3%, 52.2%) of participants reported ever having an injection site infection. In the multivariable model, those with low socioeconomic status (AOR = 2.4, P = .03), self-reported as HIV positive (AOR =1.6, P = .01), reporting more than 3 injections per day (AOR = 4.1, P = .03) and reuse of their own syringes (AOR = 8.5, P = .03) were more likely to have injection sites skin infections. PWID who used needle and syringe program (NSP) services were less likely to report injection site infections (AOR = 0.5, P = .04).

CONCLUSION

We have identified several risk factors for injection sites infections among PWID, including frequency of injection per day, reuse of their own syringes, not using NSP services, HIV status, socioeconomic status with skin infections in PWID. Prevention strategies to reduce skin infections should focus on high-risk injection behaviors and improving access to NSP services.

Factors associated with time between using a drug and injection initiation among people who inject drugs in Kermanshah, Iran

Background The transition from non-injection to injection drug use dramatically increases the risk of transmitting HIV and other blood borne infections including hepatitis B virus (HBV) and hepatitis C virus (HCV). The aim of this study was to explore factors associated with the transition from first illicit drug use to first injection among drug users. Methods Using snowball sampling and convenience sampling through needle and syringe programmes (NSPs), we recruited 500 people who inject drugs (PWID) in Kermanshah, between September and December 2014. Trained interviewers collected data on socio-demographic characteristics, HIV testing and drug-related risk behaviors over the last month prior to interview using a structured questionnaire. Our main outcome variable was first illicit drug use to first injection (TIJ). TIJ was calculated by subtracting age at first drug injection from age of first illicit drug use. Results Overall, the average age at first drug use and injection were 21.4 [standard deviation (SD 5.6)] and 22.8 (SD 8.9), respectively. The average duration of injection was 6.0 (SD 4.6) years. Overall, the mean of TIJ for participants was 1.4 (IQR = 2, 4) years. Age of first injecting drug use negatively correlated with TIJ (R2 = 0.219, p = 0.001). Education level and socioeconomic status (SES), and negatively correlated with TIJ. Conclusion Some demographic factors and drug use characteristics including educational level, SES, knowledge of HIV status, age of initiating drug use, being a poly drug user and using methamphetamine were predictors of the time to transition.

Decomposing economic disparities in risky sexual behaviors among people who inject drugs in Tehran: Blinder-Oaxaca decomposition analysis

OBJECTIVES

To our knowledge, no previous study has systematically assessed the role of economic status in risky sexual behavior among people who inject drugs (PWID) in Iran. In this study, we used Blinder-Oaxaca (BO) decomposition to explore the contribution of economic status to inequality in unprotected sex among PWID in Tehran and to decompose it into its determinants.

METHODS

Behavioral surveys among PWID were conducted in Tehran, the capital city of Iran, from November 2016 to April 2017. We employed a cross-sectional design and snowball sampling methodology. We constructed the asset index (weighted by the first principal component analysis factor) using socioeconomic data and then divided the variable into 3 tertiles. We used the BO method to decompose the economic inequality in unprotected sex.

RESULTS

Of the 520 recruited individuals, 20 were missing data for variables used to define their economic status, and were therefore excluded from the analysis. Not having access to harm reduction programs was the largest factor contributing to the economic disparity in unprotected sex, accounting for 5.5 percentage points of the 21.4% discrepancy. Of the unadjusted total economic disparity in unprotected sex, 52% was unexplained by observable characteristics included in the regression model. The difference in the prevalence of unprotected sex between the high-income and low-income groups was 25%.

CONCLUSIONS

Increasing needle syringe program coverage and improving human immunodeficiency virus (HIV) knowledge are essential for efforts to eliminate inequalities in HIV risk behaviors among PWID.