Table 3.

Association of body mass index with cognitive impairment

Adjustment	OR	95% CI	P-value
Model 1 (kg/m2)
18.5–23.9	1
<18.5	1.005	0.584–1.731	0.985
24.0–27.9	0.439	0.291–0.664	<0.001
≥28.0	0.704	0.398–1.244	0.227
Model 2 (kg/m2)
18.5–23.9	1
<18.5	0.877	0.501–1.535	0.645
24.0–27.9	0.450	0.296–0.685	,0.001
≥28.0	0.740	0.414–1.321	0.308
Model 3 (kg/m2)
18.5–23.9	1
<18.5	0.857	0.486–1.510	0.592
24.0–27.9	0.458	0.300–0.698	<0.001
≥28.0	0.708	0.394–1.270	0.247
Model 4 (kg/m2)
18.5–23.9	1
<18.5	1.033	0.595–1.793	0.907
24.0–27.9	0.439	0.289–0.667	<0.001
≥28.0	0.732	0.412–1.301	0.288
Model 5 (kg/m2)
18.5–23.9	1
<18.5	0.876	0.493–1.556	0.651
24.0–27.9	0.458	0.298–0.703	<0.001
≥28.0	0.758	0.419–1.370	0.359

Notes: Model 1: no adjustment; model 2: adjust for age, gender; model 3: adjust for age, gender, drinking, smoking, education level; model 4: adjust for hypercholesterolemia, hypertension, diabetes; model 5: adjust for age, gender, smoking, drinking, education level, hypercholesterolemia, hypertension, diabetes.