Table 5.

Financial proxies for each sentiment.

Factors in which digital peer support users experience a reduction	Financial proxy	Cost
Sadness	Average unit cost of treating someone with depression (National Institutes of Health)	PPPYa: US $10,074 (SD $25,694) PPPMb,c: US $839.50
Loneliness and isolation	Average unit cost of treating someone with objective isolation and loneliness (National Institutes of Health)	PPPY: US $1643 in Medicare spending (objective isolation) PPPM: US $136.92
Stress (eg, generalized anxiety)	Average unit cost of treating someone with stress	PPPY: US $6475 PPPM: US $539.58

^aPPPY: per person per year.

^bPPPM: per person per month.

^cPPPM calculations were made by dividing the PPPY value by 12 months.