Table 2 Risk of incident cognitive impairment according to the changing trend of RLLC^a.

	Changing trend of RLLC
	Stable healthy^d	Positively adjusted^e	Negatively adjusted^f	Stable unhealthy^g
Incident cognitive impairment
No. of cases	103	6	282	156
Person-years	1189	191	783	654
Cases per 1000 person-years	86.63	31.41	360.15	238.53
Minimally adjusted model^b
HR (95% CI)	0.45 (0.34, 0.61)	0.16 (0.07, 0.35)	1.55 (1.27, 1.89)	1 [Reference]
P value	<0.001	<0.001	<0.001
Fully adjusted model^c
HR (95% CI)	0.46 (0.34, 0.62)	0.16 (0.07, 0.35)	1.55 (1.27, 1.90)	1 [Reference]
P value	<0.001	<0.001	<0.001

RLLC risk level of lifestyle behaviors for cognition, HR hazard ratio.
^aThe sample size for this analysis is 1391.
^bAdjusted for age, sex, education level and residence location.
^cAdjusted for age, sex, education level, residence location and chronic diseases (hypertension, diabetes, hyperlipemia, coronary heart disease and cerebrovascular disease).
^dBoth baseline RLLC and follow-up RLLC are low.
^eIntermediate (baseline) to low (follow-up); high (baseline) to low (follow-up); high (baseline) to intermediate (follow-up).
^fLow (baseline) to intermediate (follow-up); low (baseline) to high (follow-up); intermediate (baseline) to high (follow-up).
^gIntermediate (baseline) to intermediate (follow-up); high (baseline) to high (follow-up).

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