Table 2.

Basic sample characteristics and estimated numbers in the NRW old age population

	NRW80+ wave 1 sample (N = 1863)	Population by 31 December 2016 (N = 1,077,296)
	N %	N
Gender (male)	676 36.3	390,702
Female	1187 63.7	686,594
Age group (80–84 years)	1012 54.3	585,050
85–89 years	573 30.7	331,145
90 years or older	278 15.0	161,102
Living situation (private)	1604 86.1	927,713
Living in institution	259 13.9	149,583
Informant (self-report)	1698 91.2	982,011
Proxy report	165 8.8	95,285
Levels of care demand (none)	1210 66.8	699,907
Level 1	58 3.2	33,304
Level 2	214 11.8	123,767
Level 3	193 10.6	111,500
Level 4	95 5.3	55,052
Level 5	43 2.4	24,849
Education (ISCED, low)	534 30.0	308,969
Medium (upper/post-secondary)	914 51.3	528,280
High (tertiary)	332 18.6	191,701

Weighted data

ISCED International Standard Classification of Education