Table 3.

Association between BMI, WC and WHR status and multimorbidity in young-old (n=4884) and old-old (n=609) adults

	Unadjusted		Covariates*
	OR (95% CI)	P value	OR (95% CI)	P value
Young-old
BMI
Normal	Ref		Ref
Underweight	0.71 (0.50 to 1.03)	0.071	0.70 (0.48 to 1.02)	0.060
Overweight	1.55 (1.36 to 1.75)	<0.001	1.48 (1.30 to 1.68)	<0.001
Obesity	2.22 (1.78 to 2.76)	<0.001	2.08 (1.66 to 2.60)	<0.001
WC
Normal	Ref		Ref
Central obesity	1.61 (1.43 to 1.82)	<0.001	1.60 (1.42 to 1.81)	<0.001
WHR
Normal	Ref		Ref
Central obesity	1.50 (1.26 to 1.77)	0.001	1.31 (1.10 to 1.56)	0.003
Old-old
BMI
Normal	Ref		Ref
Underweight	1.28 (0.62 to 2.62)	0.502	1.46 (0.69 to 3.08)	0.320
Overweight	1.28 (0.85 to 1.93)	0.233	1.23 (0.81 to 1.88)	0.335
Obesity	2.08 (0.98 to 4.40)	0.056	2.10 (0.96 to 4.57)	0.063
WC
Normal	Ref		Ref
Central obesity	1.82 (1.27 to 2.61)	0.001	1.75 (1.21 to 2.54)	0.003
WHR
Normal	Ref		Ref
Central obesity	2.09 (1.18 to 3.69)	0.012	2.15 (1.18 to 3.93)	0.013

*BMI, WC and WHR each separately adjusted for gender, residence, marital status, education, employment, income, smoking, drinking, number of weekly exercise times.

BMI, body mass index; WC, waist circumference; WHR, waist-to-hip ratio.