Table 2.

Multivariable associations of body mass index, waist circumference, and waist-hip ratio with mobility and survival status among women with total hip replacement for osteoarthritis^*

	Survived to age 85 with mobility limitation		Died before age 85
	No. survived to 85 with mobility limitation/total (%)	Multivariable-adjusted† OR (95% CI)	No. died before 85/total (%)	Multivariable-adjusted† OR (95% CI)
Body mass index‡, kg/m2
Normal (≤24.9)	125/335 (37.3)	1 [Ref]	54/335 (16.1)	1 [Ref]
Overweight (25.0–29.9)	151/329 (45.9)	1.53 (1.04–2.25)	63/329 (19.2)	1.40 (0.83–2.37)
Obese I (30.0–34.9)	108/189 (57.1)	2.40 (1.49–3.85)	36/189 (19.1)	1.40 (0.72–2.72)
Obese II (≥35.0)	45/87 (51.7)	4.37 (1.96–9.74)	32/87 (36.8)	6.08 (2.39–15.49)
Waist circumference§, cm
≤88	238/570 (41.8)	1 [Ref]	99/570 (17.4)	1 [Ref]
>88	192/372 (51.6)	1.65 (1.17–2.33)	86/372 (23.1)	1.48 (0.93–2.35)
Waist-hip ratio¶
≤0.85	287/643 (44.6)	1 [Ref]	120/643 (18.7)	1 [Ref]
>0.85	143/299 (47.8)	1.11 (0.78–1.58)	65/299 (21.7)	1.10 (0.69–1.77)

CI = confidence interval; OR = odds ratio.

^*Reference group is survived to age 85 with intact mobility.

^†Adjusted for age at first total hip replacement, study membership, education, race/ethnicity, baseline marital status, baseline alcohol consumption, baseline smoking status, baseline total physical activity, total number of chronic diseases, hormone therapy use, baseline depression, second total hip replacement, and total knee replacement.

^‡P for interaction with age at first total hip replacement = 0.77. P for trend (survived to age 85 with mobility limitation) = <0.001. P for trend (died before 85) = <0.001.

^§P for interaction with age at first total hip replacement = 0.51. P for trend (survived to age 85 with mobility limitation) = <0.001. P for trend (died before 85) = 0.002.

^¶P for interaction with age at first total hip replacement = 0.60.