. Author manuscript; available in PMC: 2023 Sep 1.

Published in final edited form as: Popul Dev Rev. 2022 Jun 24;48(3):829–862. doi: 10.1111/padr.12506

Table 1.

Hypothetical Example of Population Loneliness and Population Aging

	Trends in aging (% oldest old)		Age curve of loneliness (% lonely by age)		Expected loneliness (% lonely by time)
	Time 1	Time 2	Younger older adults	Oldest old adults	Time 1	Time 2
Country A	20%	50%	30%	60%	36%	45%
Country B	40%	60%	10%	20%	14%	16%
Country C	60%	70%	25%	50%	40%	43%

Notation/Calculation	$T_{1}$	$T_{2}$	$L_{y}$	$L_{o}$	$(1 - T_{1}) L_{y} + T_{1} L_{o}$	$(1 - T_{2}) L_{y} + T_{2} L_{o}$