Suchergebnisse

Of the estimated 10 million youths living with HIV worldwide, 63 percent live in sub-Saharan Africa. This article focuses on migration as a risk factor of HIV infection among the youths in sub-Saharan Africa. The study is based on multilevel modeling, applied to the youth sample of the Demographic and Health Surveys (DHS), conducted from 2003 to 2008 in nineteen countries. The analysis takes into account country-level and regional-level variations. The results suggest that across countries in sub-Saharan Africa, migrants have on average about 50 percent higher odds of HIV infection than nonmigrants. The higher risk among migrants is to a large extent explained by differences in demographic and socioeconomic factors. In particular, migrants are more likely to be older, to have been married, or to live in urban areas, all of which are associated with higher risks of HIV infection. The higher risk among youths who have been married is particularly pronounced among young female migrants.

SummaryThis paper examines the effect of orphanhood and HIV status of adults in a household on onset of sexual activity among adolescent girls and boys aged 15–17 years in sub-Saharan Africa. Multilevel logistic regression models were applied to pooled Demographic and Health Surveys data from nineteen countries of sub-Saharan Africa where HIV test data were collected during 2003–2008 from nationally representative samples of men and women of reproductive age. The results highlight increased vulnerability among adolescent boys and girls living in households where an adult is infected with HIV, and adolescent boys who are paternal orphans. On average, adolescent boys and girls living in households where at least one adult is HIV-positive have about 25% higher odds of having initiated sexual activity compared with their counterparts of similar characteristics in households where no adult is HIV-positive. Furthermore, adolescent boys who are paternal orphans have about 25% higher odds of having initiated sexual activity than their non-orphan counterparts of similar individual characteristics. Further analysis reveals that household circumstances relating to living arrangements and poverty are important pathways through which household HIV/AIDS status is linked to adolescent sexual debut. The findings underscore the importance of international efforts in the sub-Saharan Africa region to address the plight of other children in HIV/AIDS-affected households, beyond orphans.

SummaryThe timing of transitions to sexual activity, marriage and childbearing in sub-Saharan Africa is undergoing profound changes. This study investigates the determinants of adolescent transitions in South Nyanza, a socioeconomically deprived setting in Kenya where adolescent reproductive health is a particular concern. The analysis is based on Cox regression of timing of first sexual intercourse, first marriage and first pregnancy, using data from a survey of 1247 females aged 12–19 years. The results show that higher household socioeconomic status and educational attainment are associated with delayed onset of all three transition events. Furthermore, mother's higher educational attainment is protective for initiation of sexual intercourse while rural residence is protective for pregnancy experience. Other protective factors include communication with parents or with fellow girlfriends. However, discussing sexual matters with boyfriends, high internal locus of control, and gender bias are associated with early onset of the three transition events.

This study uses data from the 1989, 1993, and 1998 Kenya Demographic and Health Surveys to examine trends and determinants of contraceptive method choice in Kenya. The analysis, based on two‐level multinomial regression models, shows that, over time, the use of modern contraceptive methods, especially long‐term methods, is higher in urban than in rural areas, whereas the pattern is reversed for traditional methods. Use of barrier methods among unmarried women is steadily rising, but the levels remain disappointingly low, particularly in view of the HIV/AIDS epidemic in Kenya. One striking result from this analysis is the dramatic rise in the use of injectables. Of particular program relevance is the notably higher levels of use of injectables among rural women, women whose partners disapprove of family planning, uneducated women, and those less frequently exposed to family planning media messages, compared with their counterparts who have better access to services and greater exposure to family planning information.

SummaryThis study contributes to the dialogue on the
prevention of mother-to-child HIV transmission
(PMTCT) through the use of HIV and antenatal care
(ANC) integrated services. The determinants of
antenatal HIV testing in Zimbabwe were explored.
Multilevel logistic regression models were applied
to data for 8471 women from 406 clusters who gave
birth in the 5 years preceding Zimbabwe Demographic
and Health Surveys conducted in 2005/6 and 2010/11.
The uptake of antenatal HIV testing was found to be
determined by a wide range of individual-level
factors relating to women's economic and demographic
status, as well as HIV-related factors, including
HIV awareness and stigma within the community.
Important individual-level enabling and perceived
need factors included high socioeconomic status, not
having observed HIV-related stigma and knowledge of
HIV status (based on a previous HIV test), such that
these groups of individuals had a significantly
higher likelihood of being tested for HIV during
pregnancy than their counterparts of lower
socioeconomic status, and who had observed
HIV-related stigma or did not know their HIV status.
The results further revealed that community HIV
awareness is important for improving antenatal HIV
testing, while stigma is associated with reduced
testing uptake. Most contextual community-level
factors were not found to have much effect on the
uptake of antenatal HIV testing. Therefore, policies
should focus on individual-level predisposing and
enabling factors to improve the uptake of antenatal
HIV testing in Zimbabwe.

Introduction Zimbabwe is still burdened with HIV epidemic and the government has an ambitious aim in the post-2015 era to end the AIDS epidemic by 2030. To achieve this, the government has set up the 90-90-90 strategic milestones to be achieved by 2020. It is daunting task to increase HIV testing uptake from current estimate of 56%to 90% to meet these targets. The current government's initiative requires an understanding of determinants of HIV testing. Objectives The specific objectives of this study are to: (i) identify the individual and community-level determinants of HIV testing, focussing on predisposing, enabling and perceived need factors (PREP); and (ii) establish gender differences. Material and Methods We applied multilevel logistic regression models to nationally-representative samples of 17,797women and 14,587 men from the 2005/6 and 2010/11 Zimbabwe Demographic and Health Surveys to examine the determinants of HIV testing. Results HIV testing uptake increased significantly between 2005/6 and 2010/11, especially for women (females OR=5.60; males OR=2.57). Most PREP factors associated with HIV testing are largely consistent with patterns in Southern Africa (e.g. higher uptake by women and those who are wealthier), but unique patterns have also emerged. In particular, results reveal important gender differences: rural residence is associated with lower uptake of HIV testing for women (OR=0.74) but higher for men (OR=1.16); community wealth is a more important factor in enabling HIV testing than household wealth for women, but the converse is true for men; and individual-level, rather than community-level stigma is important for women, while for men, it is community-level stigma that is important. Conclusion Observed gender disparities in determinants of HIV testing calls for gender specific response. Couple-oriented HIV counselling and testing services where men accompany their spouse to HIV screening during pregnancy may help increase HIV testing uptake for males and reduce gender disparities.

SummaryA number of authors have identified multiple concurrent sexual partnerships by both men and women to lie at the root of the HIV/AIDS epidemic in sub-Saharan Africa. This study applies multilevel models to Demographic and Health Survey data collected during 2003–2008 in 20 sub-Saharan African countries to examine the influence of social and cultural context on involvement with multiple sexual partnerships in the region, above and beyond the effects of individual characteristics. The findings provide support for the ecological argument that health behaviours are shaped and determined by societal conditions, in addition to the effects of individual and household characteristics. Involvement with multiple sex partners is most prevalent in societies in which sexual norms are widely permissive and where polygyny is common. Individual autonomy is substantial and attitudes towards sexuality are more liberal among men and women who live in communities in which sexual norms are widely permissive. Men and women who are most likely to have multiple sex partners in the sub-Saharan region are those who initiated sexual activity earlier and those who have the individual attributes (e.g. young age, urban residence, education, media exposure and working for cash and away from home) that bring to them more rights and/or decision-making autonomy, but not necessarily more financial resources and economic security (mostly among women). On the other hand, involvement with multiple partners is determined by cultural norms (i.e. permissive sexual norms) and social change (i.e. mass education, expansion of cash employment). The findings suggest a number of opportunities for more effective policy and programmatic responses to curb the prevalence of multiple partnerships in sub-Saharan Africa.

This paper examines the association of the sociodemographic characteristics of women and the unobserved hospital factors with maternal mortality in Kenya using multilevel logistic regression. The data analysed comprise hospital records for 58,151 obstetric admissions in sixteen public hospitals, consisting of 182 maternal deaths. The results show that the probability of maternal mortality depends on both observed factors that are associated with a particular woman and unobserved factors peculiar to the admitting hospital. The individual characteristics observed to have a significant association with maternal mortality include maternal age, antenatal clinic attendance and educational attainment. The hospital variation is observed to be stronger for women with least favourable sociodemographic characteristics. For example, the risk of maternal death at high-risk hospitals for women aged 35 years and above, who had low levels of education, and did not attend antenatal care is about 280 deaths per 1000 admissions. The risk for similar women at low-risk hospitals is about 4 deaths per 1000. To complement results from the analysis of individual patient records, the paper includes findings from hospital staff reports regarding the maternal mortality situation at the hospitals.

Studies addressing factors associated with adverse birth outcomes have almost exclusively been based on hospital statistics. This is a serious limitation in developing countries where the majority of births do not occur within health facilities. This paper examines factors associated with premature deliveries, small baby's size at birth and Caesarean section deliveries in Kenya based on the 1993 Kenya Demographic and Health Survey data. Due to the hierarchical nature of the data, the analysis uses multilevel logistic regression models to take into account the family and community effects. The results show that the odds of unfavourable birth outcomes are significantly higher for first births than for higher order births. Furthermore, antenatal care (measured by frequency of antenatal care visits and tetanus toxoid injection) is observed to have a negative association with the incidence of premature births. For the baby's size at birth, maternal nutritional status is observed to be a predominant factor. Short maternal stature is confirmed as a significant risk factor for Caesarean section deliveries. The observed higher odds of Caesarean section deliveries among women from households of high socioeconomic status are attributed to the expected association between socioeconomic status and the use of appropriate maternal health care services. The odds of unfavourable birth outcomes vary significantly between women. In addition, the odds of Caesarean section deliveries vary between districts, after taking into account the individual-level characteristics of the woman.

Summary.This paper uses DHS data from 20 countries in sub-Saharan Africa, collected in the late 1990s and early 2000s, to examine perceived size of newborn and Caesarean section deliveries among teenagers in the region. A comparison between teenagers and older women, based on logistic regression analyses for individual countries, as well as multilevel logistic analyses applied to pooled data across countries, and controlling for the effects of important socioeconomic and demographic factors, shows that in general, births to teenagers are more likely to be small in size but are less likely to be delivered by Caesarean section compared with births among older women. An examination of the country-level variations shows significant differences in perceived size of newborn and Caesarean section deliveries between countries. However, the observed pattern by maternal age does not vary significantly between countries, suggesting that these patterns are generalizable for the region. For teenagers with characteristics associated with higher odds of Caesarean section, being in a country with an overall higher rate particularly amplifies their individual probability.

This paper explores the pathways of the determinants of unfavourable birth outcomes, such as premature birth, the size of the baby at birth, and Caesarean section deliveries, in Kenya using graphical log-linear chain models. The results show that a number of factors that do not have direct associations with unfavourable birth outcomes contribute to these outcomes indirectly through intermediate factors. Marital status, the desirability of a pregnancy, the use of family planning and access to health facilities have no direct associations with poor birth outcomes, such as premature births and the small size of the baby at birth, but are linked to these outcomes through antenatal care. Antenatal care is identified as a central link between various sociodemographic or reproductive factors and birth outcomes.

AbstractThis paper reports findings of a pilot survey of adolescent sexual and reproductive health (ASRH) knowledge and behaviour in Homabay County of western Kenya. The study was based on a cross-sectional survey of 523 male and female adolescents aged 10–19 years from 32 Community Health Units (CHUs). Bivariate analysis of gender differences and associations between ASRH knowledge and behaviour was followed with two-level logistic regression analysis of predictors of ASRH behaviour (sexual activity, unprotected sex, HIV testing), taking individual adolescents as level-1 and CHUs as level-2. The findings reveal important gender differences in ASRH knowledge and behaviour. While male adolescents reported higher sexual activity (ever had sex, unprotected last sex), female adolescents reported higher HIV testing. Despite having lower HIV/AIDS knowledge, female adolescents were more likely to translate their SRH knowledge into appropriate behaviour. Education emerged as an important predictor of ASRH behaviour. Out-of-school adolescents had significantly higher odds of having ever had sex (aOR=3.3) or unprotected last sex (aOR=3.2) than their in-school counterparts of the same age, gender and ASRH knowledge, while those with at least secondary education had lower odds of unprotected sex (aOR=0.52) and higher odds of HIV testing (aOR=5.49) than their counterparts of the same age, gender and SRH knowledge who had primary education or lower. However, being out of school was associated with higher HIV testing (aOR=2.3); and there was no evidence of significant differences between younger (aged 10–14) and older (aged 15–19) adolescents in SRH knowledge and behaviour. Besides individual-level predictors, there were significant community variations in ASRH knowledge and behaviour, with relatively more-deprived CHUs being associated with poorer indicators. The overall findings have important policy/programme implications. There is a need for a comprehensive approach that engages schools, health providers, peers, parents/adults and the wider community in developing age-appropriate ASRH interventions for both in-school and out-of-school adolescents in western Kenya.