Table 1.

Components of mobile app and volunteer interventions focusing on reducing TB^a and PB^b.

IPTSc components			TB			PB
Aims of intervention			Reduce sense of loneliness and increase social connectedness			Reduce self-hate and enhance self-assurance
Programmed
	Mobile app	Self-awareness of daily mood states Reduction in loneliness through automatic reminders on participants’ own support network contacts; for example, direct dial function with social network (friends and family, social and health care resources) Appointment reminders for health care/psychosocial services Positive message of the day			Push message: participants’ prewritten positive messages of self-encouragement Knowledge bank on mental health Stress/mood management skills through various practices
Personalized
	Volunteer support (at least 2 contacts per month made by volunteers for each assigned participant)	Emotional support, active listening, and encouragement to comply with treatment			Provision of positive feedback to and assisting participants in self-assurance through positive messages
Personalized additional components as a safety measure
	Suicide risk screening through simple questions (ie, ask and refer) report crisis to the research team	N/Ad		N/A

^aPB: perceived burdensomeness.

^bTB: thwarted belongingness.

^cIPTS: interpersonal-psychological theory of suicide.

^dN/A: not applicable.