Table 3.

Association of waist-to-hip ratio (per 0.1 increase) with cognitive impairment under different body mass index groups

	Quartiles of body mass index, kg/m2
	12.1–20.8	>20.8–22.9	>22.9–25.3	>25.3–42.8
Subjects (n)	2244	2266	2311	2266
Waist-to-hip ratio
Range	0.61–1.26	0.46–1.29	0.49–1.49	0.58–1.38
Mean	0.87±0.07	0.89±0.06	0.91±0.06	0.93±0.06
Model 1*	1.13 (0.98–1.31)	1.12 (0.93–1.35)	1.38 (1.14–1.65)	1.39 (1.13–1.70)
Model 2†	1.01 (0.86–1.18)	0.93 (0.75–1.13)	1.13 (0.94–1.41)	1.36 (1.10–1.69)
Model 3‡	0.99 (0.83–1.17)	0.92 (0.75–1.13)	1.14 (0.93–1.40)	1.37 (1.10–1.71)

*Adjusted for body mass index.

†Based on model 1, model 2 was further adjusted for age, sex, nation, education, marital status and family economics.

‡Based on model 2, model 3 was further adjusted for smoking, drinking, physical exercise, hypertension, stroke and depression.