Influencing factors, gender differences and the decomposition of inequalities in cognitive function in Chinese older adults: a population-based cohort study

Table 3 Results of gender-differentiated RIF-OLS regression of ICFCOA

Gender grouping	Model 1^a: No controls		Model 2^b: No controls + IPW		Model 3^c: Controls		Model 4^d: Controls + IPW
Gender grouping	OTE 1	P-value	OTE 2	P-value	OTE 3	P-value	OTE 4	P-value
Mean	1.278^**	≤ 0.001	1.013^**	≤ 0.001	0.750^**	≤ 0.001	0.887^**	≤ 0.001
10th quantile	1.893^**	≤ 0.001	0.919^*	0.015	1.192^**	≤ 0.001	0.900^**	0.005
90th quantile	0.326^**	0.009	0.275	0.341	0.063	0.693	0.245	0.295
90-10th IQ range	-1.566^**	≤ 0.001	-0.640	0.187	-1.128^**	≤ 0.001	-0.650	0.104
90-10th IQ ratio	-0.797^**	≤ 0.001	-0.346	0.100	-0.505^**	≤ 0.001	-0.341^*	0.040
Gini	-0.054^**	≤ 0.001	-0.041^**	≤ 0.001	-0.035^**	≤ 0.001	-0.037^**	≤ 0.001
CV	-0.088^**	≤ 0.001	-0.070^**	≤ 0.001	-0.059^**	≤ 0.001	-0.063^**	≤ 0.001
Observations	4868		4868		4868		4868

ICFCOA, inequalities in cognitive function in Chinese older adults; IQ range, the 90-10th interquartile range; IQ ratio, the 90-10th interquartile ratio; Gini, the Gini coefficient; CV, the coefficient of variation; RIF, recentered influence function; OLS, ordinary least squares; OTE, overall treatment effect.
^a In Model 1, adding no control variables.
^b In Model 2, adding no controls but using the reweighting adjustment (IPW).
^c In Model 3, adding controls as in Tables 1 and 2, but without the reweighting adjustment.
^d In Model 4, adding both controls and the reweighting adjustment.
Standard errors and P-values for all models were obtained using bootstrap methods with 500 replications.
^*P < 0.05, ^**P < 0.01.

ISSN: 1471-2318