Visceral fat area is the measure of obesity best associated with mobility disability in community dwelling oldest-old Chinese adults

Table 4 Associations between the four definitions of obesity and odds of mobility disability

	N (%)	Model 1 ^a	Model 2 ^b	Model 3 ^c
		OR (95% CI)	OR (95% CI)	OR (95% CI)
Obesity defined by visceral fat area
Not obese	303 (51.4%)	Ref.	Ref.	Ref.
Obese	286 (48.6%)	2.38 (1.68, 3.38)	2.36 (1.61, 3.47)	2.04 (1.10, 3.77)
Obesity defined by body mass index
Not obese	505 (85.7%)	Ref.	Ref.	Ref.
Obese	84 (14.3%)	2.22 (1.33, 3.72)	2.57 (1.38, 4.79)	1.43 (0.70, 2.94)
Obesity defined by waist circumference
Not obese	218 (37.0%)	Ref.	Ref.	Ref.
Obese	371 (63.0%)	1.85 (1.27, 2.68)	1.61 (1.06, 2.44)	0.96 (0.56, 1.62)
Obesity defined by percent body fat
Not obese	257 (43.6%)	Ref.	Ref.	Ref.
Obese	332 (56.4%)	2.07 (1.45, 2.94)	2.13 (1.44, 3.13)	1.29 (0.69, 2.40)

OR odds ratio, CI confidence interval
^a Model 1: adjusted for age, sex, level of education
^b Model 2: adjusted for Model 1 and diabetes, stroke, heart diseases, arthritis, osteoporosis/hip fracture, cognitive impairment, sarcopenia
^c Model 3: adjusted for Model 2 and body mass index, waist circumference, percent body fat, visceral fat area

ISSN: 1471-2318