Mobile phone access and implications for digital health interventions among adolescents and young people in Zimbabwe: A cross-sectional survey (Preprint)
BACKGROUND Mobile phones may help young people (YP) access health information and support health service engagement. However, in low-income settings there is limited knowledge on YP’s phone and internet access to inform the feasibility of implementing digital health interventions. OBJECTIVE We investigated YP’s access to technology to inform the development of mobile interventions for HIV self-testing and mental health counselling within a trial of community-based health interventions for YP (CHIEDZA) in Zimbabwe. METHODS A cross-sectional population-based survey was conducted from October to December 2018 among YP aged 13-24 years in five CHIEDZA communities in urban and peri-urban Harare and Mashonaland East, Zimbabwe. Consenting YP completed a short self-completed tablet-based questionnaire on mobile phone ownership and use, and use of the internet. The primary outcome was the proportion who reported owning a mobile phone. Multiple logistic regression was used to investigate factors associated with mobile phone ownership and with internet access, with adjustment for the one-stage cluster sampling design. A priori exploratory variables were age, sex, marital status, and urban/peri-urban residence. RESULTS A total of 634/719 (88.2%) eligible YP, mean age 18.0 years (SD 3.3) and 62.6% female, participated. Of the YP interviewed, 62.6% (95%CI 58.5, 66.5) reported owning a phone and a further 4.3% reported having access to a shared phone. Phone ownership increased with age: 27.0% of 13-15-year olds, 61.0% of 16-17-year olds, 71.5% of 18-19 year olds and 84.7% of 20-24 year olds (OR 1.4 (1.3, 1.5) per year increase). Ownership was similar among females and males (61.2% (95%CI 55.8, 66.3) vs. 64.8% (95%CI 57.8, 71.2); age-adjusted OR 0.7 (0.5, 1.1)), and similar across other socio-demographic factors. YP reported that 85.3% of phones, either owned or shared, were smartphones. The most commonly used phone application was WhatsApp (71%), and 16.4% of phone owners reported having ever used their phone to track their health. A total of 407/631 (64.5% (95%CI 60.3, 68.5)) currently had access to the internet (used in last 3 months on any device) with access increasing with age (OR 1.2 (1.2, 1.3) per year increase). In age adjusted analysis, internet access was higher among males, the unmarried, those with a higher level of education, phone owners, and those who had lived in the community for more than one year. The aspect of the Internet that YP most disliked was unwanted sexual (27%) and violent (13%) content. CONCLUSIONS Mobile phone-based interventions may be feasible in this population; however, such interventions could increase inequity especially if they require access to the internet. Internet-based interventions should consider potential risks for participants and incorporate skill-building on safe internet and phone use.