Table 2.

Overall characteristics of the 26 included reports

Characteristics		Number of reports	References
Data source
Self-reports		19	[1, 2, 21, 24, 34, 36–48, 51]
Registers		7	[4–6, 30, 49, 50, 52]
Gender stratification
Only men		2	[36, 37]
Only women		1	[44]
Gender stratification		20	[1, 2, 4–6, 30, 34, 38–43, 45–50, 52]
No gender stratification		3	[21, 24, 51]
WLE (definition)
Economic activity expectancy (employed or unemployed)		8	[1, 2, 36, 37, 41, 43, 44, 52]
Employment expectancy		13	[4–6, 21, 30, 34, 38, 40, 45–48, 51]
Productive work expectancy		2	[49, 50]
HWLE (definition)		5
Years being healthy and employed		3	[21, 39, 51]
Years employed without disability		1	[24]
Years being economically active without functional limitations		1	[1]
Working years lost		13
Retirement		6	[5, 6, 34, 36, 37, 46]
Disability		6	[5, 6, 36, 37, 47, 50]
Unemployment		6	[4–6, 42, 46, 50]
Economically inactive/outside of the labour market		10	[4–6, 34, 42, 44, 46, 47, 50]
Involuntary exit (unemployment, disability)		1	[30]
Voluntary exit (retirement, inactive)		1	[30]
Socioeconomic indicator
Level of education		21	[1, 2, 6, 21, 24, 30, 34, 36–44, 46–49, 52]
Social or occupational class		7	[4, 5, 21, 45, 48–50]
Approach for calculation of WLE
Prevalence-based		5	[1, 2, 5, 46, 48]
Incidence-based		21	[4, 6, 21, 24, 30, 34, 36–45, 47, 49–52]
Type of life Tablea
Period		21	[1, 2, 4–6, 21, 30, 34, 38–47, 49–52]
Cohort		6	[5, 24, 36, 37, 48, 50]
Interval-censoringb
No interval censoring		1	[50]
Less than one year		4	[6, 30, 42, 49]
One year or more		16	[4, 21, 24, 34, 36–41, 43–45, 47, 49–52]
Censoring by age
Around retirement age		10	[1, 2, 6, 24, 30, 42, 48–50, 52]
No age censoring		16	[4, 5, 21, 34, 36–41, 43–47, 51]

^aIn study by Leinonen and co-authors (2018) both types of life table were used

^bOnly for studies that used incidence-based approach for estimation of WLE or related indicators