SMS messaging to improve retention and viral suppression in prevention of mother-to-child HIV transmission (PMTCT) programs in Kenya: A 3-arm randomized clinical trial

John Kinuthia, Keshet Ronen, Jennifer A Unger, Wenwen Jiang, Daniel Matemo, Trevor Perrier, Lusi Osborn, Bhavna H Chohan, Alison L Drake, Barbra A Richardson, Grace John-Stewart, John Kinuthia, Keshet Ronen, Jennifer A Unger, Wenwen Jiang, Daniel Matemo, Trevor Perrier, Lusi Osborn, Bhavna H Chohan, Alison L Drake, Barbra A Richardson, Grace John-Stewart

Abstract

Background: Pregnant and postpartum women living with HIV (WLWH) need support for HIV and maternal child health (MCH) care, which could be provided using short message service (SMS).

Methods and findings: We compared 2-way (interactive) and 1-way SMS messaging to no SMS in a 3-arm randomized trial in 6 MCH clinics in Kenya. Messages were developed using the Health Belief Model and Social Cognitive Theory; HIV messages were integrated into an existing MCH SMS platform. Intervention participants received visit reminders and prespecified weekly SMS on antiretroviral therapy (ART) adherence and MCH, tailored to their characteristics and timing. Two-way participants could message nurses as needed. Clinic attendance, viral load (VL), and infant HIV results were abstracted from program records. Primary outcomes were viral nonsuppression (VL ≥1,000 c/ml), on-time clinic attendance, loss to follow-up from clinical care, and infant HIV-free survival. Among 824 pregnant women randomized between November 2015 and May 2017, median age was 27 years, gestational age was 24.3 weeks, and time since initiation of ART was 1.0 year. During follow-up to 2 years postpartum, 9.8% of 3,150 VL assessments and 19.6% of women were ever nonsuppressed, with no significant difference in 1-way versus control (11.2% versus 9.6%, adjusted risk ratio (aRR) 1.02 [95% confidence interval (CI) 0.67 to 1.54], p = 0.94) or 2-way versus control (8.5% versus 9.6%, aRR 0.80 [95% CI 0.52 to 1.23], p = 0.31). Median ART adherence and incident ART resistance did not significantly differ by arm. Overall, 88.9% (95% CI 76.5 to 95.7) of visits were on time, with no significant differences between arms (88.2% in control versus 88.6% in 1-way and 88.8% in 2-way). Incidence of infant HIV or death was 3.01/100 person-years (py), with no significant difference between arms; risk of infant HIV infection was 0.94%. Time to postpartum contraception was significantly shorter in the 2-way arm than control. Study limitations include limited ability to detect improvement due to high viral suppression and visit attendance and imperfect synchronization of SMS reminders to clinic visits.

Conclusions: Integrated HIV/MCH messaging did not improve HIV outcomes but was associated with improved initiation of postpartum contraception. In programs where most women are virally suppressed, targeted SMS informed by VL data may improve effectiveness. Rigorous evaluation remains important to optimize mobile health (mHealth) interventions.

Trial registration: ClinicalTrials.gov number NCT02400671.

Conflict of interest statement

I have read the journal’s policy and the authors of this manuscript have the following competing interests: BR has been on a DSMB and mock FDA advisory panel for Gilead; and GJS reports financial support from NIH. All other authors declare no competing interests.

Figures

Fig 1. Participant flowchart. MCH, maternal child…
Fig 1. Participant flowchart. MCH, maternal child health; SMS, short message service; VL, viral load.
Fig 2. Effect of Mobile WACh-X on…
Fig 2. Effect of Mobile WACh-X on viral nonsuppression, loss to follow-up, infant HIV-free survival, and ART resistance.
aHR, adjusted hazard ratio; ART, antiretroviral therapy; SMS, short message service.

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