Concurrency and other sexual partnership patterns reported in a survey of young people in rural Northern Tanzania.

African adolescents and young adults remain at substantial risk of infection with HIV and other sexually transmitted infections (STIs), and AIDS is the leading cause of death among African adolescents (10-19 years). Sexual partnership patterns influence transmission risk of sexually transmitted infections. We describe patterns reported by youth (15-30y) in a community-based survey in Tanzania. Among participants reporting multiple partners, we investigated factors associated with reported concurrency. Female (N = 6513) and male (N = 7301) participants had median ages of 21 and 22 years, respectively. Most participants (92%) reported having previously been sexually active, of whom 15% of males and <1% of females reported ≥4 partners in the past year. The point prevalence of concurrency was 2.3% (95%CI 1.9-2.9) for females and 10.6% (95%CI 9.3-12.1) for males. High levels of multiple and concurrent partnerships were reported by those previously married. Females were more likely than males to report having spousal/regular partners and longer partnership lengths. Compared to males, the partnerships reported by females were less likely to be new partnerships, and more likely to be defined by the respondent as still 'ongoing'. Females reporting younger sexual debut were more likely to report concurrent sexual partners. Far fewer young women reported multiple and concurrent partnerships, but we cannot definitively conclude that concurrency was uncommon for women, because stigma towards women's multiple sexual partnerships might contribute to substantial under-reporting, as was found in extensive qualitative research in the study population. This study provides one of the most comprehensive quantitative descriptions of partnership patterns of young people in an African setting. Interventions addressing sexual risk among youth should involve male partners, empower women to protect themselves within different types of partnerships, and encourage a greater openness about young people's sexual relationships.

A systematic review of individual and contextual factors affecting ART initiation, adherence, and retention for HIV-infected pregnant and postpartum women.

BACKGROUND: Despite progress reducing maternal mortality, HIV-related maternal deaths remain high, accounting, for example, for up to 24 percent of all pregnancy-related deaths in sub-Saharan Africa. Antiretroviral therapy (ART) is effective in improving outcomes among HIV-infected pregnant and postpartum women, yet rates of initiation, adherence, and retention remain low. This systematic literature review synthesized evidence about individual and contextual factors affecting ART use among HIV-infected pregnant and postpartum women. METHODS: Searches were conducted for studies addressing the population (HIV-infected pregnant and postpartum women), intervention (ART), and outcomes of interest (initiation, adherence, and retention). Quantitative and qualitative studies published in English since January 2008 were included. Individual and contextual enablers and barriers to ART use were extracted and organized thematically within a framework of individual, interpersonal, community, and structural categories. RESULTS: Thirty-four studies were included in the review. Individual-level factors included both those within and outside a woman's awareness and control (e.g., commitment to child's health or age). Individual-level barriers included poor understanding of HIV, ART, and prevention of mother-to-child transmission, and difficulty managing practical demands of ART. At an interpersonal level, disclosure to a spouse and spousal involvement in treatment were associated with improved initiation, adherence, and retention. Fear of negative consequences was a barrier to disclosure. At a community level, stigma was a major barrier. Key structural barriers and enablers were related to health system use and engagement, including access to services and health worker attitudes. CONCLUSIONS: To be successful, programs seeking to expand access to and continued use of ART by integrating maternal health and HIV services must identify and address the relevant barriers and enablers in their own context that are described in this review. Further research on this population, including those who drop out of or never access health services, is needed to inform effective implementation.

The sexual behaviour of adolescents in sub-Saharan Africa: patterns and trends from national surveys.

OBJECTIVES: To describe the sexual and reproductive behaviour of adolescents in sub-Saharan Africa, particularly 15- to 19-year-olds. METHODS: Using DHS/AIS data (2000-2010), nine indicators of adolescent behaviour and one of adult attitudes towards condom education for adolescents were described for 24 countries. Indicators were disaggregated by gender, urban/rural residency and educational status, and time trends were described. RESULTS: Up to 25% of 15- to 19-year-olds reported sex before age 15; this proportion shrank over time in many countries. In most countries, ≥5% of females reported marriage before age 15, and >20% had commenced childbearing. Early sexual debut and childbearing were more common among the least educated and/or rural females. Reporting of multiple sexual partnerships was more common among males than among females, but decreases over time were more common among males. Urban males and females, and females with higher education, were more likely to report multiple partnerships. Urban youth and those with higher education also reported more condom use. Adult support for condom education for 12- to 14-year-olds has increased over time to 60-65%. CONCLUSIONS: Many 15- to 19-year-olds are at risk of HIV/STIs and unplanned pregnancies because of multiple partnerships and insufficient condom and other contraceptive use. In many countries, trends are moving in a favourable direction. To better inform prevention programmes in this important area, we recommend routine collection of sexual and reproductive behaviour data for adolescents aged <15 years, expanding the data collected for 15- to 19-year-olds to include detailed information on sexual behaviour within partnerships, and disaggregating data according to sociodemographic variables.

Impact of the MEMA kwa Vijana adolescent sexual and reproductive health interventions on use of health services by young people in rural Mwanza, Tanzania: results of a cluster randomized trial.

PURPOSE: To assess the impact of an adolescent sexual health intervention on the use of health services by young people in Tanzania. METHODS: Twenty communities, including 39 health facilities, were randomly allocated to the intervention or comparison arm. Health workers from the intervention arm were trained in the provision of youth-friendly health services, as part of a package of interventions. Independent process evaluations were conducted in health facilities, and simulated patients visited clinics using sexual and reproductive health problem scenarios. The impact on health facility attendances were assessed in 1998 (baseline) and 1999-2001. Reported sexually transmitted infection (STI) symptoms and use of health services were evaluated in young people in the trial cohort. RESULTS: The mean monthly attendance for STI symptoms per health facility, per month was .5 for young males and 1.0 for young females at baseline. Attendance by young males was greater in the intervention communities in 1999-2000 after adjustment for baseline differences (p = .005), and this difference increased over time (p-trend = .022). The mean difference in attendance was however relatively modest, at 1.1 per month in 2001 after adjustment for baseline (95% CI: .5, 1.7). There was weaker evidence of an intervention effect on attendance by young women (p = .087). Few condoms were distributed, although a greater number were distributed in intervention facilities (p = .008). Generally, intervention health workers tended to be less judgmental and provided more comprehensive information. CONCLUSIONS: Training staff to provide more youth-friendly health services can increase the utilization of health services for suspected STIs by young people, especially among young men.

Long-term biological and behavioural impact of an adolescent sexual health intervention in Tanzania: follow-up survey of the community-based MEMA kwa Vijana Trial.

BACKGROUND: The ability of specific behaviour-change interventions to reduce HIV infection in young people remains questionable. Since January 1999, an adolescent sexual and reproductive health (SRH) intervention has been implemented in ten randomly chosen intervention communities in rural Tanzania, within a community randomised trial (see below; NCT00248469). The intervention consisted of teacher-led, peer-assisted in-school education, youth-friendly health services, community activities, and youth condom promotion and distribution. Process evaluation in 1999-2002 showed high intervention quality and coverage. A 2001/2 intervention impact evaluation showed no impact on the primary outcomes of HIV seroincidence and herpes simplex virus type 2 (HSV-2) seroprevalence but found substantial improvements in SRH knowledge, reported attitudes, and some reported sexual behaviours. It was postulated that the impact on "upstream" knowledge, attitude, and reported behaviour outcomes seen at the 3-year follow-up would, in the longer term, lead to a reduction in HIV and HSV-2 infection rates and other biological outcomes. A further impact evaluation survey in 2007/8 ( approximately 9 years post-intervention) tested this hypothesis. METHODS AND FINDINGS: This is a cross-sectional survey (June 2007 through July 2008) of 13,814 young people aged 15-30 y who had attended trial schools during the first phase of the MEMA kwa Vijana intervention trial (1999-2002). Prevalences of the primary outcomes HIV and HSV-2 were 1.8% and 25.9% in males and 4.0% and 41.4% in females, respectively. The intervention did not significantly reduce risk of HIV (males adjusted prevalence ratio [aPR] 0.91, 95%CI 0.50-1.65; females aPR 1.07, 95%CI 0.68-1.67) or HSV-2 (males aPR 0.94, 95%CI 0.77-1.15; females aPR 0.96, 95%CI 0.87-1.06). The intervention was associated with a reduction in the proportion of males reporting more than four sexual partners in their lifetime (aPR 0.87, 95%CI 0.78-0.97) and an increase in reported condom use at last sex with a non-regular partner among females (aPR 1.34, 95%CI 1.07-1.69). There was a clear and consistent beneficial impact on knowledge, but no significant impact on reported attitudes to sexual risk, reported pregnancies, or other reported sexual behaviours. The study population was likely to have been, on average, at lower risk of HIV and other sexually transmitted infections compared to other rural populations, as only youth who had reached year five of primary school were eligible. CONCLUSIONS: SRH knowledge can be improved and retained long-term, but this intervention had only a limited effect on reported behaviour and no significant effect on HIV/STI prevalence. Youth interventions integrated within intensive, community-wide risk reduction programmes may be more successful and should be evaluated. TRIAL REGISTRATION: ClinicalTrials.gov NCT00248469

A qualitative study of participant adherence in a randomized controlled trial of herpes suppressive therapy for HIV prevention in Tanzania.

Poor participant adherence to treatment may contribute to lack of impact in some biomedical HIV prevention trials. This qualitative study explored adherence in a randomized controlled trial of herpes suppressive therapy to reduce HIV acquisition and infectivity among 1305 Tanzanian women. The trial found participants completed 72% of visits on treatment; 52-56% of women on treatment had > or = 90% adherence by pill count estimate; and between six and nine months 30/86 (35%) of urine samples from acyclovir recipients tested acyclovir negative, and 7/86 (8%) from placebo recipients tested acyclovir positive. Twenty in-depth interviews (IDIs) were conducted after 30 months with respondents randomly selected from "acyclovir negative" acyclovir recipients and "acyclovir positive" placebo recipients, or by preliminary pill count adherence categories ("under users," "good users," and "over users"). Almost all respondents reported appropriate adherence and positive trial attitudes, e.g., trusting staff, appreciating services, perceiving pills as beneficial. Fourteen understood placebo use, and six understood the trial purpose. Notably, 5/9 acyclovir recipients and 1/11 placebo recipients believed their pills had treated pre-existing sexually transmitted infections. Limited understanding did not negatively affect reported adherence. Reported adherence problems usually related to illness, travel, and/or family obligations (e.g., husband's disapproval). "Acyclovir positive" placebo recipients denied taking other participants' pills. The IDIs also did not resolve discrepant reports of pill loss or theft. Biomedical HIV interventions often have strong behavioral components that require close attention during intervention development, trial design, and process and impact evaluation. This study identified topics which warrant further consideration, including: information reinforcement and comprehension assessment throughout a trial for long-term participant understanding; involving partners in adherence promotion activities; strategizing with participants to maintain adherence during familial illnesses or other crises; and close monitoring, identification, and follow-up of (1) individuals with discrepant biological tests, and (2) other sources of the treatment in the trial area. Methodological research is also needed to improve adherence measures.

Circumcision among adolescent boys in rural northwestern Tanzania.

OBJECTIVE: Male circumcision reduces risk of HIV among heterosexual men by about 60%. Modelling the impact of circumcision on HIV transmission, and planning service expansion, relies on self-reported circumcision status. We investigated the validity of self-reported status. METHODS: Survey and in-depth interview (IDI) data from adolescents enrolled in a community randomized sexual health intervention trial in rural Mwanza, Tanzania were analysed. RESULTS: The 5354 male school attenders (median age 15.5 years) were recruited in 1998 and followed for 3 years. At baseline, circumcision prevalence was 13.7% by self-report and 11.8% by clinical examination, rising to 17.3% by clinical examination at final survey. Only 61.5% of Muslim males were circumcised at the final survey. Of 506 participants who reported being circumcised at baseline, only 78.9% reported this at interim. Similarly, only 84.2% of participants clinically assessed as circumcised at baseline were also assessed as circumcised at interim. At both baseline and interim surveys, about 80% of participants who reported being circumcised were also found to be so at clinical examination. There was a high tolerance and respect for circumcision among male IDI respondents, with widespread belief that it was beneficial for penile hygiene and disease prevention. The majority of female IDI respondents said that they did not know what male circumcision was. DISCUSSION: Attitudes to male circumcision were positive in this population despite its low prevalence. There were substantial inconsistencies in both self-reported and clinically assessed circumcision status. Methods are needed to improve self-report and training of clinicians in this setting.

Children of the sug: a study of the daily lives of street children in Khartoum, Sudan, with intervention recommendations.

OBJECTIVES: The study examines street children's daily lives in Khartoum, Sudan to recommend ways to improve their conditions and to successfully assist them off the streets. METHODS: In 2000-2001, eight researchers conducted participant observation for 7 weeks; 20 groups of children engaged in role-plays and drawing activities; over 500 children participated in qualitative group and individual interviews; and 872 current and former street children were surveyed. RESULTS: Approximately half of children were 14 years old or younger. Daily life focused on eating, sucking glue-soaked rags, obtaining money, and sometimes movies or games; many children valued their freedom and relatively abundant food on the streets. Boys engaged in odd jobs, and sometimes theft, begging, or sex work. Girls had fewer work opportunities and primarily obtained money through begging and sex work. Almost half of children saw their families weekly. Children belonged to same-sex groups of common geographic origin, which shared food, shelter, and care when sick; boys' group leaders could be both protectors and aggressors. Most girls had a boyfriend who financially assisted and protected her. Girls frequently were raped by street boys, police, or other men. Children feared routine capture, beating and incarceration by authorities. Former street children were housed in large camps where abuse was common, or costly small residencies. CONCLUSIONS: Street-based services to improve children's health and safety are urgently needed. Re-integration programs may help large numbers of children voluntarily and permanently leave the streets. Advocacy campaigns and collaborative efforts with the police, judiciary and legislature should be intensified. PRACTICE IMPLICATIONS: The paper highlights important challenges facing street children in Khartoum, and provides specific recommendations for how they might be better assisted while on the streets and successfully helped off of the streets through community re-integration, rather than current (1) large-scale beating and incarceration by government authorities, or (2) small-scale and costly residential housing by NGOs. The findings have already been used in a sustained advocacy campaign that has resulted in a number of positive legislative changes for street children, such as parliamentary endorsement of a new bill that improves street children's legal status.

Aborting and suspending pregnancy in rural Tanzania: an ethnography of young people's beliefs and practices.

The World Health Organization estimates that 3.1 percent of East African women aged 15-44 have undergone unsafe abortions. This study presents findings regarding abortion practices and beliefs among adolescents and young adults in Tanzania, where abortion is illegal. From 1999 to 2002, six researchers carried out participant observation in nine villages and conducted group discussions and interviews in three others. Most informants opposed abortion as illegal, immoral, dangerous, or unacceptable without the man's consent, and many reported that ancestral spirits killed women who aborted clan descendants. Nonetheless, abortion was widely, if infrequently, attempted, by ingestion of laundry detergent, chloroquine, ashes, and specific herbs. Most women who attempted abortion were young, single, and desperate. Some succeeded, but they experienced opposition from sexual partners, sexual exploitation by practitioners, serious health problems, social ostracism, and quasi-legal sanctions. Many informants reported the belief that inopportune pregnancies could be suspended for months or years using traditional medicine. We conclude that improved reproductive health education and services are urgently needed in rural Tanzania.

Biological and behavioural impact of an adolescent sexual health intervention in Tanzania: a community-randomized trial.

OBJECTIVE: The impact of a multicomponent intervention programme on the sexual health of adolescents was assessed in rural Tanzania. DESIGN: A community-randomized trial. METHODS: Twenty communities were randomly allocated to receive either a specially designed programme of interventions (intervention group) or standard activities (comparison group). The intervention had four components: community activities; teacher-led, peer-assisted sexual health education in years 5-7 of primary school; training and supervision of health workers to provide 'youth-friendly' sexual health services; and peer condom social marketing. Impacts on HIV incidence, herpes simplex virus 2 (HSV2) and other sexual health outcomes were evaluated over approximately 3 years in 9645 adolescents recruited in late 1998 before entering years 5, 6 or 7 of primary school. RESULTS: The intervention had a significant impact on knowledge and reported attitudes, reported sexually transmitted infection symptoms, and several behavioural outcomes. Only five HIV seroconversions occurred in boys, whereas in girls the adjusted rate ratio (intervention versus comparison) was 0.75 [95% confidence interval (CI) 0.34, 1.66]. Overall HSV2 prevalences at follow-up were 11.9% in male and 21.1% in female participants, with adjusted prevalence ratios of 0.92 (CI 0.69, 1.22) and 1.05 (CI 0.83, 1.32), respectively. There was no consistent beneficial or adverse impact on other biological outcomes. The beneficial impact on knowledge and reported attitudes was confirmed by results of a school examination in a separate group of students in mid-2002. CONCLUSION: The intervention substantially improved knowledge, reported attitudes and some reported sexual behaviours, especially in boys, but had no consistent impact on biological outcomes within the 3-year trial period.

Are schools a good setting for adolescent sexual health promotion in rural Africa? A qualitative assessment from Tanzania.

African adolescents are at high risk of poor sexual health. School-based interventions could reach many adolescents in a sustainable and replicable way, if enrolment, funding and infrastructure are adequate. This study examined pupils', recent school leavers', parents' and teachers' views and experiences of rural Tanzanian primary schools, focusing on the implications for potential sexual health programmes. From 1999 to 2002, participant observation was conducted in nine villages for 158 person-weeks. Half of Year 7 pupils were 15-17 years old, and few went on to secondary school, suggesting that primary schools may be a good venue for such programmes. However, serious challenges include low enrolment and attendance rates, limited teacher training, little access to teaching resources and official and unofficial practices that may alienate pupils and their parents, e.g. corporal punishment, pupils being made to do unpaid work, forced pregnancy examinations, and some teachers' alcohol or sexual abuse. At a national level, improved teacher training and supervision are critical, as well as policies that better prevent, identify and correct undesired practices. At a programme level, intervention developers need to simplify the subject matter, introduce alternative teaching methods, help improve teacher-pupil and teacher-community relationships, and closely supervise and appropriately respond to undesired practices.

A process evaluation of a school-based adolescent sexual health intervention in rural Tanzania: the MEMA kwa Vijana programme.

This study is a process evaluation of the school component of the adolescent sexual health programme MEMA kwa Vijana (MkV), which was implemented in 62 primary schools in rural Mwanza, Tanzania from 1999 to 2001. The MkV curriculum was a teacher-led and peer-assisted programme based on the Social Learning Theory. Process evaluation included observation of training sessions, monitoring and supervision, annual surveys of implementers, group discussions and 158 person-weeks of participant observation. Most teachers taught curriculum content well, but sometimes had difficulty adopting new teaching styles. Peer educators performed scripted dramas well, but were limited as informal educators and behavioural models. The intervention appeared successful in addressing some cognitions, e.g. knowledge of risks and benefits of behaviours, but not others, e.g. perceived susceptibility to risk. MkV shared the characteristics of other African school-based programmes found to be successful, and similarly found significant improvements in self-reported behaviour in surveys. However, a substantial proportion of MkV survey self-reports were inconsistent, there was no consistent impact on biological markers and extensive process evaluation found little impact on several key theoretical determinants of behaviour. Improvements in self-reported survey data alone may provide only a very limited-and perhaps invalid-indication of adolescent sexual health programme success.

'The man who believed he had AIDS was cured': AIDS and sexually-transmitted infection treatment-seeking behaviour in rural Mwanza, Tanzania.

Most people living with AIDS in sub-Saharan Africa have had neither a biomedical diagnosis nor antiretroviral medication, leading to the question of how individuals understand and treat AIDS. This study examined general illness, sexually-transmitted infection (STI) and AIDS treatment-seeking behaviour in rural Mwanza, Tanzania. From 1999-2002, participant observation was carried out in nine villages for a total of 158 person-weeks. Treatments were pluralistic and opportunistic, usually beginning with home remedies (western or traditional), followed by visits to traditional healers (THs) and/or health facilities (HFs). THs were sometimes preferred over HFs because of familiarity, trust, accessibility, expense, payment plans, and the perceived cause, nature and severity of the illness, e.g. only THs were believed to successfully treat bewitchment. Some people, particularly young girls, delayed or avoided seeking treatment for STIs for fear of stigma. Most STIs were attributed to natural causes, but AIDS was sometimes attributed to witchcraft. Locally available biomedical care of people with AIDS-like symptoms consisted of basic treatment of opportunistic infections. Most such individuals repeatedly visited THs and HFs, but many stopped attending HFs because they came to believe they could not be cured there. Some THs claimed to cure witchcraft-induced, AIDS-like illnesses. There is an urgent need for improved biomedical services, and TH interventions could be important in future HIV/AIDS education and care.

Farming with your hoe in a sack: condom attitudes, access, and use in rural Tanzania.

This study examines condom knowledge, attitudes, access, and practices in rural Mwanza, Tanzania. From 1999-2002, six researchers carried out participant observation in nine villagesfor a total of 158 person-weeks. Many villagers perceived condoms negatively for multiple reasons, for example, the method's association with infection or promiscuity, reduced male sexual pleasure, and cultural understandings of meaningful sex. Men controlled the terms of sexual encounters and reported that they would use condoms only with risky partners, but few perceived their partners as such. Use of condoms appeared to be very low, primarily as a result of limited demand, although barriers to access also existed. These qualitative findings contrast with inconsistent survey reports of relatively high condom use in the same population. Intervention efforts should address the tradeoff between possible short- and long-term consequences of condom use, particularly for men, for example, reduced pleasure versus reduced HIV risk. If possible, surveys should assess the validity of reported condom use through comparison with other data, including qualitative findings and distribution/sales records.

'She was bewitched and caught an illness similar to AIDS': AIDS and sexually transmitted infection causation beliefs in rural northern Tanzania.

HIV/AIDS programmes and interventions are more likely to succeed if they engage with local people's beliefs about AIDS causation. This study examined beliefs about general illness, sexually-transmitted infection (STI) and AIDS aetiology in rural Mwanza, Tanzania. From 1999-2002, participant observation was carried out in nine villages for a total of 158 person-weeks. Beliefs about general illness causation included God's will, chance, natural/biological, ancestral spirits, and witchcraft. STIs were generally attributed to natural causes, but beliefs about AIDS causation were more complex. Few villagers had heard of HIV, but most had heard of AIDS and understood that AIDS could be contracted through sex. A small proportion of villagers knew that such an infected person might appear healthy, but they generally believed the asymptomatic period to last only a few months after exposure; if healthy beyond that, the person was not believed to have been infected. Many people in all villages reported belief in both a 'real' (natural) AIDS, which leads to certain death, and a similar illness caused by witchcraft, which can be cured using traditional medicine. Punishment of accused witches occurs officially and informally, and this may increase with increasing AIDS deaths. There is an urgent need for culturally appropriate interventions to address HIV/AIDS causation beliefs in the region.

Contradictory sexual norms and expectations for young people in rural Northern Tanzania.

There has been a long-running debate as to whether sexual cultures in sub-Saharan Africa are permissive or characterised by restrictive rules, rituals and self-restraint. This paper, based on participant observation data, outlines the main features of sexual culture in rural northern Tanzania and highlights both permissive and restrictive norms and expectations for young people. It also illustrates how sexual beliefs are socially constructed and subject to social change. Sexual activity is constrained by clear norms of school pupil abstinence, female sexual respectability and taboos around the discussion of sex. However, these norms are incompatible with several widely held expectations: that sexual activity is inevitable unless prevented, sex is a female resource to be exploited, restrictions on sexual activity are relaxed at festivals, and masculine esteem is boosted through sexual experience. Differential commitment to these norms and expectations reflects conflicts between generations and genders. Young people appear to manage the contradictions in these norms by concealing their sexual relationships. This almost certainly contributes to their short duration and the high levels of partner change, since relationships are not reinforced through social recognition and there is little scope to develop intimacy through non-sexual contacts.

The MEMA kwa Vijana project: design of a community randomised trial of an innovative adolescent sexual health intervention in rural Tanzania.

BACKGROUND: Effective interventions to reduce the incidence of HIV, other sexually transmitted infections (STIs) and unwanted pregnancy among adolescents in sub-Saharan Africa are urgently needed. This paper describes the rationale and design of a randomised trial of the impact of an innovative sexual health intervention among adolescents in rural Mwanza Region, Tanzania. METHODS: The MEMA kwa Vijana intervention comprises a teacher-led, peer-assisted sexual health education programme for students in the last 3 years of primary school, training and supervision of health workers in the provision of youth-friendly health services, peer condom promotion and distribution, and wider community activities. Detailed process evaluation was conducted and the impact of the intervention was evaluated through a community-randomised trial in which a cohort of 9645 adolescents was followed up for 3 years. Both process and impact evaluation used multiple assessment methods. Impact measures included incidence and prevalence of HIV and other STIs, pregnancy rates, knowledge and reported attitudes and sexual behaviour, as well as qualitative assessments. RESULTS: Results of the baseline survey of the cohort have been presented previously. The outcome of the trial will be reported separately. CONCLUSIONS: Behaviour change interventions among adolescents have been widely advocated, but there have been few rigorously designed trials of their effectiveness, particularly in developing countries, and measurement of sexual behaviour is particularly problematic in this age group. The MEMA kwa Vijana trial was undertaken to address these problems and to collect rigorous evidence on the effectiveness of an innovative intervention, designed to be implemented on a very large scale.

A typology of groups at risk of HIV/STI in a gold mining town in north-western Tanzania.

Mining communities with migrant populations are high-risk locations for human immunodeficiency virus (HIV)/sexually transmitted infection transmission in Sub-Saharan Africa. Interventions presupposing certain groups to be at high risk, such as those working exclusively as commercial sex workers, may divert attention from other high-risk groups. Qualitative research was conducted in a small town adjacent to a large-scale commercial gold mine in north-western Tanzania. Objectives were to identify populations at high risk of HIV and suggest suitable behavioural interventions by gaining an understanding of sexual behaviour patterns in the town. Rapid assessment procedures were employed comprising participant observation, informal questioning and in-depth interviews. Epidemiological categories of "core", "bridging" and "general" populations may not be adequate to the understanding of risk. Many types of women were found to receive payment for sex, distinguished by permanency of residence, age, relationship status, accommodation and income-earning activity. Paying for sex and having multiple partners was common among most men. The town was a high-risk environment as a result of the economic opportunities available there (in contrast to the poverty of surrounding areas), which were often accessed by offering sex in exchange for money or gifts. In this environment, the potential for spread of HIV infection between sub-populations was high and identification of distinct high- and low-risk groups not possible. However, the methodology enabled the identification of different social circumstances of risk, such as residential arrangements, employment status and venues for recreation, associated with different types of people. Targeted interventions may be oriented to specific circumstances in order to address risk practices in a culturally appropriate manner. It is useful to think of risk environments rather than attributing risk to types of people, and to target interventions to these environments. The methodology also enabled an approach to interventions sensitive to different circumstances associated with risk within the town while identifying structural factors affecting risk at the level of the town as a whole.

Asking semi-literate adolescents about sexual behaviour: the validity of assisted self-completion questionnaire (ASCQ) data in rural Tanzania.

OBJECTIVES: To develop and test a sexual behaviour survey method for semi-literate populations, combining the privacy of a self-completion questionnaire (SCQ) with the clarity of a face-to-face questionnaire (FFQ). METHODS: In 1998, 6079 Tanzanian primary school students (mean age 15.1 years) were surveyed using an innovative assisted self-completion questionnaire (ASCQ). The format of the questionnaire was simple, all responses were closed, and conceptually complex questions such as those involving ranking or multiple answers were avoided. The ASCQ was administered to groups of 20 by a research assistant who read questions and answers aloud in two languages so pupils could tick or write responses independently. A total of 4958 of respondents from the 1998 ASCQ Cohort also participated in a 1998 FFQ interview and, in 2000, 4424 again completed an ASCQ. RESULTS: In the 1998 ASCQ survey, 55.0% of males and 21.1% of females reported they had had vaginal intercourse, of whom 71.5% and 66.0%, respectively reported their first sexual relationship lasted for a week or less, and 49.5% and 59.6%, respectively reported they had had sex in the last 4 weeks. After adjustment for age, reported sex was associated with alcohol use in both males (OR = 1.57) and females (OR = 1.69), earning money for males (OR = 1.32) and not living with a mother for females (OR = 0.77). The vast majority of respondents did not appear to have difficulty completing the ASCQ, but 7.4% of 1998 respondents and 2.9% of 2000 respondents selected all first or all last answers in a section for which this was inconsistent. This bias was associated with female, less educated and more geographically remote respondents. Of those respondents who reported sex in the 1998 ASCQ survey, 32.1% reported fewer total partners in the 2000 ASCQ survey, 25.2% reported having had sex fewer times than originally reported, and 61.9% of those who reported having used a condom in 1998 reported never having used one in 2000. While the proportions reporting sex were very similar in the 1998 ASCQ and FFQ surveys, 37.9% of males and 59.2% of females reporting sex only did so on one of the two questionnaires. Higher proportions of respondents reported sensitive information in the ASCQ than the FFQ, although in some cases this may have related to answer order bias. CONCLUSION: The results suggest that an ASCQ may be useful in assessing sexual behaviour in African adolescents, particularly for older, male and/or educated respondents. However, triangulation with data from other surveys raises questions about the validity of self-reported sexual behaviour in general.