Table 3.

Decomposition analysis of socioeconomic inequalities in cognitive impairment among Chinese older adults

Variable	Elasticity	C	Contribution to the C
			Contribution	%	Summed percentage
Demographic factors
Sex					17.25
Female (ref.)
Male	−0.0918	0.0855	−0.0078	17.25
Age (years)					133.61
≥ 85 (ref.)
75 ~ 84	−0.4813	0.1100	−0.0529	116.36
65 ~ 74	−0.6230	0.0126	− 0.0078	17.25
Marital status					85.68
Currently married and living with a spouse (ref.)
Separated/divorced/widowed/never married	0.1922	−0.2028	−0.0390	85.68
Residential area					−0.07
Rural (ref.)
Urban/Town	0.0020	0.0163	0.0000	−0.07
Socioeconomic status
Education level					−39.73
Middle school or more (ref.)
Primary school	−0.1744	−0.0691	0.0120	−26.48
No schooling	−0.0872	−0.0691	0.0060	−13.25
Occupation					21.24
white-collar (ref.)
non-white-collar	0.2416	−0.0400	−0.0097	21.24
Economic status (quintile)					−1.02
5 (richest) (ref.)
4	0.0521	0.0078	0.0004	−0.89
3	0.0613	0.0017	0.0001	−0.23
2	0.0719	−0.0002	0.0000	0.03
1 (poorest)	0.0987	−0.0003	0.0000	0.07
Social support
Emotional support					84.85
Spouse (ref.)
Children	0.2219	−0.1735	−0.0385	84.60
Relatives/friends/neighbors and others	−0.0110	0.0093	−0.0001	0.23
Nobody	0.0275	−0.0005	0.0000	0.03
Financial support					−4.19
Yes (ref.)
No	0.0859	0.0222	0.0019	−4.19
Living arrangement					0.88
With household member(s) (ref.)
In an institution	0.0097	−0.0539	−0.0005	1.15
Alone	−0.1110	−0.0011	0.0001	−0.27
Social participation
Organized activities					0.18
Yes (ref.)
No	−0.0486	0.0017	−0.0001	0.18
Informal activities					0.30
Yes (ref.)
No	0.0462	−0.0030	−0.0001	0.30