Relationship between β-amyloid protein 1-42, thyroid hormone levels and the risk of cognitive impairment after ischemic stroke

Table 5 Association between β-amyloid protein 1-42, triiodothyronine levels and post stroke cognitive impairment stratified by age, gender and education levels

Variable	Aβ1-42			T3
	RR1	95%CI	P value	RR1	95%CI	P value
Age in yr
< 70	0.982	0.437-2.188	0.173	0.371	0.208-0.663	0.001
≥ 70	0.416	0.290-0.612	< 0.001	0.319	0.139-0.731	0.007
Gender
Male	0.794	0.328-1.901	0.075	0.618	0.249-1.527	0.298
Female	0.537	0.352-0.846	0.028	0.472	0.270-0.794	0.005
Education levels
Illiterate	0.682	0.511-0.853	0.034	0.151	0.056-0.403	< 0.001
Primary school	0.945	0.875-0.998	0.047	0.786	0.414-1.495	0.464
Postsecondary school	0.853	0.640-1.066	0.089	0.937	0.625-1.403	0.256

¹These statistical results were adjusted for age, gender, body mass index, education levels, smoking, drinking, history of disease, National Institutes of Health Stroke Scale, low-density lipoprotein and triglyceride. Aβ1-42: β-amyloid protein1-42; T₃: Triiodothyronine; RR: Relative risk; CI: Confidence interval.