Blar i Bergen Open Research Archive på forfatter "de Vries, Hein"
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Effect of the PREPARE intervention on sexual initiation and condom use among adolescents aged 12-14: A cluster randomised controlled trial in Dar es Salaam, Tanzania
Mmbaga, Elia John; Kajula, Lusajo; Aarø, Leif Edvard; Kilonzo, Mrema; Wubs, Annegreet Gera; Eggers, Sander Matthijs; de Vries, Hein; Kaaya, Sylvia (Peer reviewed; Journal article, 2017-04-17)Background: Unsafe sexual practices continue to put adolescents at risk for a number of negative health outcomes in Tanzania. While there are some effective theory-based intervention packages with positive impact on important ... -
Predicting Primary and Secondary Abstinence Among Adolescent Boys and Girls in the Western Cape, South Africa
Eggers, Sander M.; Mathews, Catherine; Aarø, Leif Edvard; McClinton-Appollis, Tracy; Bos, Arjan E.R.; de Vries, Hein (Peer reviewed; Journal article, 2017-05)Two of the most effective health behaviours with regard to HIV prevention are condom use and sexual abstinence. While determinants of condom use among sub-Saharan African adolescents have been studied extensively, factors ... -
Promoting sexual and reproductive health among adolescents in southern and eastern Africa (PREPARE): project design and conceptual framework
Aarø, Leif Edvard; Mathews, Catherine; Kaaya, Sylvia; Katahoire, Anne Ruhweza; Onya, Hans E.; Abraham, Charles; Klepp, Knut-Inge; Wubs, Annegreet; Eggers, Sander Matthijs; de Vries, Hein (Peer reviewed; Journal article, 2014-01-18)Background: Young people in sub-Saharan Africa are affected by the HIV pandemic to a greater extent than young people elsewhere and effective HIV-preventive intervention programmes are urgently needed. The present article ... -
Reaching the hard to reach: longitudinal investigation of adolescents' attendance at an after-school sexual and reproductive health programme in Western Cape, South Africa
Mathews, Catherine; Eggers, Sander Matthijs; de Vries, Petrus; Mason-Jones, Amanda; Townsend, Loraine; Aarø, Leif Edvard; de Vries, Hein (Peer reviewed; Journal article, 2015-07-04)Background: Adolescents need access to effective sexual and reproductive health (SRH) interventions, but face barriers accessing them through traditional health systems. School-based approaches might provide accessible, ... -
Sociocognitive Predictors of Condom Use and Intentions Among Adolescents in Three Sub-Saharan Sites
Eggers, Sander M.; Aarø, Leif Edvard; Bos, Arjan E.R.; Mathews, Catherine; Kaaya, Sylvia; Onya, Hans; de Vries, Hein (Peer reviewed; Journal article, 2015-04-30)Many HIV intervention programs in sub-Saharan Africa have applied social cognitive theories such as the theory of planned behavior. However, a recent sub-Saharan African review was unable to show increased effectiveness ...