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Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk
Thesis (MSc)--Stellenbosch University, 2018.
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2018
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| _version_ | 1867613762964422656 |
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| access_status_str | Open Access |
| author | Dominic, Emanuel |
| author2 | Delva, Wim |
| author_browse | Delva, Wim Dominic, Emanuel |
| author_facet | Delva, Wim Dominic, Emanuel |
| author_sort | Dominic, Emanuel |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MSc)--Stellenbosch University, 2018. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/105216 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:41:18.607Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/105216 Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk Dominic, Emanuel Delva, Wim Stellenbosch University. Faculty of Science. Dept. of Mathematical Sciences. HIV infections -- Transmission -- Eswatini Young women -- Health risk assessment -- Eswatini Young women -- Sexual behavior Men -- Sexual behavior -- Eswatini Man-woman relationships -- Age differences Age-mixing -- Sexual behavior UCTD Thesis (MSc)--Stellenbosch University, 2018. ENGLISH ABSTRACT: Age-mixing has been hypothesized to affect HIV transmission dynamics and has been used to partially explain the high HIV incidence rate among adolescent girls and young women in Sub-Saharan Africa. However, evidence in the literature is mixed. We undertook this study to quantify the age-mixing patterns among men in Eswatini and to investigate the effect of partner age difference on risky sexual behaviours that affect HIV transmission risk. We used nationwide data collected by the Swaziland HIV Incidence Measurement Survey (2010–2011) and fitted linear mixed models with partner age as the response and participant age as the only predictor. To investigate the effect of part-ner age difference on condom use, sex frequency and partner type, we fitted cumulative logistic mixed models to the data. A stratified Cox model was used to explore the effect of partner age difference on relationship duration. In these analyses, we adjusted for participant age and the total number of partners in the past six months. We found that a yearly increase in male participant age resulted in an increase in partner age difference by 0.63 years on average. Men in this study population had large within-individual variation in partner ages that increased with age. We also found that similar aged relationships were associated with high frequency of using condoms whereas relationships with large partner age differences were associated with low condom use. Sex frequency decreased as the partner age difference increased until age difference of 10 years when it plateaued. Large partner age differences were associated with a low likelihood of a partner being a casual partner. However, there was no sufficient evidence that partner age difference had an effect on relationship duration. An age-mixing pattern characterised by older men having large partner age differences, high variability in partner ages and low condom use indicates that they can act as intermediaries through which HIV can be transmitted from one age group to another. AFRIKAANSE OPSOMMING: Die hipotese dat die dinamika van MIV-oordrag beïnvloed word deur menging tus-sen ouderdomsgroepe in seksuele verhoudings, word gebruik om gedeeltelik die hoë MIV- voorkomskoers onder tiener meisies en jong vroue in Afrika suid van die Sahara te verduidelik. Bewyse hiervoor is egter gemengd. In hierdie studie onderneem ons om ouderdomsmengpatrone onder mans in Eswatini te kwantifiseer en om die effek van ouderdomsverskil in verhoudings op riskante seksuele gedrag wat MIV-oordrag risiko beïnvloed, te ondersoek. Ons het landwye data gebruik, ingesamel deur die Swaziland MIV-voorkomsmetingsopname (2010-2011) en lineêre modelle toegepas om die men-ging tussen ouderdomsgroepe te kwantifiseer. Om die effek van ouderdomsverskil in verhoudings op kondoomgebuik, seksfrekwensie en maat tipe te ondersoek, het ons ku-mulatiewe logistieke gemengde modelle op die data toegepas. ‘n Gestratifiseerde Cox-model is gebruik om die effek van ouderdomsverskille in verhoudings op verhoudings-duur te ondersoek. Ons het gevind dat ‘n toename van een jaar in die ouderdom van manlike deelnemers gelei het tot ‘n toename in ouderdomsverskil van 0.63 jare. Mans in hierdie studiepopulasie het groot intra-individuele variasie in ouderdomsverskille in verhoudings gehad en die variasie het toegeneem met ouderdom. Ons het ook bevind dat soortgelyke bejaardes verhoudings met hoë frekwensie verband hou met kondome gebruik, terwyl verhoudings met groot vennoot ouderdom verskille geassosieer met lae kondoom gebruik. Seksfrekwensie het afgeneem aangesien die ouderdomsverskil van die vennoot toegeneem het tot ’n ouderdomsverskil van 10 jaar toe dit plataf was. Groot vennoot ouderdom verskille was geassosieer met ’n lae waarskynlikheid dat ’n vennoot ’n toevallige vennoot is. Daar was egter nie voldoende bewyse dat die ouderdomsver-skil van die vennoot ’n uitwerking op die duur van die verhouding gehad het nie. ’n Ouderdomsmengpatroon wat gekenmerk word deur ouer mans met groot vennoot ou-derdom verskille, hoë variasies in ouderdom verskille en lae kondoom gebruik stel voor dat hulle kan gesien word as tussengangers waardeur MIV van een ouderdomsgroep na ’n ander oorgedra word. Masters 2018-11-22T10:04:33Z 2018-12-10T06:36:56Z 2018-11-22T10:04:33Z 2018-12-10T06:36:56Z 2018-12 Thesis http://hdl.handle.net/10019.1/105216 en Stellenbosch University xiv, 69 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | HIV infections -- Transmission -- Eswatini Young women -- Health risk assessment -- Eswatini Young women -- Sexual behavior Men -- Sexual behavior -- Eswatini Man-woman relationships -- Age differences Age-mixing -- Sexual behavior UCTD Dominic, Emanuel Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title | Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title_full | Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title_fullStr | Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title_full_unstemmed | Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title_short | Age-mixing patterns and associations between partner age differences and relationship characteristics that affect HIV transmission risk |
| title_sort | age mixing patterns and associations between partner age differences and relationship characteristics that affect hiv transmission risk |
| topic | HIV infections -- Transmission -- Eswatini Young women -- Health risk assessment -- Eswatini Young women -- Sexual behavior Men -- Sexual behavior -- Eswatini Man-woman relationships -- Age differences Age-mixing -- Sexual behavior UCTD |
| url | http://hdl.handle.net/10019.1/105216 |
| work_keys_str_mv | AT dominicemanuel agemixingpatternsandassociationsbetweenpartneragedifferencesandrelationshipcharacteristicsthataffecthivtransmissionrisk |