Study Outcomes
SECONDARY
Self-reported uptake of SIV measured at month 6 was the primary outcome. This outcome was validated by requesting participants to upload an image of their SIV receipt, blocking personal identification, via the messaging application account used in this trial. No incentive was offered for validation.The secondary outcome was SOC measured at both baseline and month 6. Measurements and definitions of SOC were the same as those used by the intervention system. At each intervention session of participants in the intervention group, the SOC was retrieved from the chat history stored in the intervention system. The number of intervention sessions completed by all participants was also documented.